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Rulon Bearings

A. Schulman Gapex® FPP20GQ12HB 20% Fiberglass/Mineral Reinforced, Chemically-Coupled, Impact-Modified Polypropylene
Categories: Polymer; Thermoplastic; Polypropylene (PP); Polypropylene with 20% Glass Fiber Filler

Material Notes: 20% Fiberglass/Mineral Reinforced, Chemically-Coupled, Impact-Modified Polypropylene

Description: Black

Comments:
Testing and measurements were performed at 73 ± 3°F and 50± 5% relative humidity unless otherwise noted.
Filler Content: 19.5%; ASTM D2584
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): 20-50 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- Weigh pars for consistent packing. Cushion (Range): 0.2-0.5 in. Nozzle Type: Free flowing/Standard.
Some conditions may have to be altered to obtain acceptable parts. back pressure must be minimized to retain fiber length and optimize performance. Please do not run too cold, molded in stress & rough surface may become a problem. If you must run below melt or temperature 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.

Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesMetricEnglishComments
Density 1.04 g/cc0.0376 lb/in³ASTM D792
Linear Mold Shrinkage 0.0080 - 0.011 cm/cm0.0080 - 0.011 in/inASTM D955
Melt Flow 9.5 g/10 min
@Load 2.16 kg,
Temperature 230 °C
9.5 g/10 min
@Load 4.76 lb,
Temperature 446 °F
ASTM D1238
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Ultimate 31.0 MPa4500 psiASTM D638
Elongation at Break 4.0 %4.0 %ASTM D638
Flexural Yield Strength 61.4 MPa8900 psiASTM D790
Flexural Modulus 1.90 GPa275 ksiTangent; ASTM D790
Flexural Modulus, 1% Secant 1780 MPa258000 psiASTM D790
Izod Impact, Notched 0.801 J/cm1.50 ft-lb/inASTM D256
Izod Impact, Unnotched 2.94 J/cm5.50 ft-lb/inASTM D4812
Gardner Impact 2.09 J
@Temperature 23.0 °C
1.54 ft-lb
@Temperature 73.4 °F
M.F.E.; ASTM D5420
 
Thermal PropertiesMetricEnglishComments
Deflection Temperature at 0.46 MPa (66 psi) 127 °C260 °FASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 96.1 °C205 °FASTM D648
 
Processing PropertiesMetricEnglishComments
Rear Barrel Temperature 216 - 232 °C420 - 450 °F
Middle Barrel Temperature 216 - 232 °C420 - 450 °F
Front Barrel Temperature 221 - 243 °C430 - 470 °F
Nozzle Temperature 54.4 - 243 °C130 - 470 °F
Mold Temperature 37.8 - 48.9 °C100 - 120 °FCore. Cooler temperatures may be needed to maintain dimensions or eliminate sinks in thick sections.
 43.3 - 54.4 °C110 - 130 °FCavity
Drying Temperature 82.2 °C180 °F2-3 hrs at 180°F or 4+ hours at 160°F.
Dry Time 2 - 3 hour2 - 3 hour
 
Descriptive Properties
ColorBlack

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