Minimal Mold Plate Out & Surface Bloom Unfilled, Flame-Retardant Polypropylene Description: Comments: Testing and measurements were performed at 73 ± 3°F and 50± 5% relative humidity unless otherwise noted. Hot Wire Ignition (HWI): 53 seconds as per UL 94 (Melt through with ignition). California Furniture Testing: Passed as per TB 133. Material Pre-dry: Normally it is not necessary to pre-dry this material. However, if conditions dictate drying to optimize material properties and part appearance then dry in a desiccant dryer at 180°F for 2-3 hours or 160°F for >4 hours. Manifolds: Maintain manifolds, runners and tips 10 to 20°F above the front one temperature to allow easier filling. (Gate drool is best eliminated using screw decompression rather than reducing tip temperature.) Back Pressure (Range): 50-100 psi. Injection Speed: medium to slow > depending on surface appearance. Screw Speed: medium. Injection Pressure: Adjust to just above a short shot. Injection Time: Adjust to just above a short shot. Cushion (Range): 0.2-0.5 in. Nozzle Type: Free flowing/Standard. Some conditions may have to be altered to obtain acceptable parts. Please do not run too cold, molded in stress and rough surface may become a problem. If you must run below melt or temperatures recommended for dimensional precision you may compromise impact and esthetics. Retest parts to confirm performance. Data provided by Ferro Corporation - Specialty Plastics Group. A. Schulman has acquired the Ferro specialty plastics business. |