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Rulon Bearings

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A. Schulman Ferrex® GPP20CC56HB 20% Calcium Carbonate Filled, High-Gloss Homopolymer Polypropylene
Categories: Polymer; Thermoplastic; Polypropylene (PP); Polypropylene with 20% Calcium Carbonate (CaCO3) Filler

Material Notes: 20% Calcium Carbonate Filled, High-Gloss Homopolymer Polypropylene

Description: Blue

Comments:
Testing and measurements were performed at 73 ± 3°F and 50± 5% relative humidity unless otherwise noted.
Filler Content: 21%; 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): 50-100 psi. Injection Speed: medium. 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. 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.

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 PropertiesOriginal ValueComments
Density 1.04 g/ccASTM D792
Linear Mold Shrinkage 0.016 - 0.019 cm/cmASTM D955
Melt Flow 9.5 g/10 min
@Load 2.16 kg,
Temperature 230 °C
ASTM D1238
 
Mechanical PropertiesOriginal ValueComments
Tensile Strength, Ultimate 4400 psiASTM D638
Elongation at Break 25 %ASTM D638
Flexural Yield Strength 7400 psiASTM D790
Flexural Modulus 340000 psiTangent; ASTM D790
Flexural Modulus, 1% Secant 315000 psiASTM D790
Izod Impact, Notched 1.00 ft-lb/inASTM D256
Izod Impact, Unnotched 18.5 ft-lb/inASTM D4812
Gardner Impact 35.0 in-lb
@Temperature 23.0 °C
M.F.E.; ASTM D5420
 
Thermal PropertiesOriginal ValueComments
Deflection Temperature at 0.46 MPa (66 psi) 245 °FASTM D648
Deflection Temperature at 1.8 MPa (264 psi) 185 °FASTM D648
 
Processing PropertiesOriginal ValueComments
Rear Barrel Temperature 400 - 410 °F
Middle Barrel Temperature 405 - 415 °F
Front Barrel Temperature 415 - 420 °F
Nozzle Temperature 420 - 430 °F
Mold Temperature 100 - 120 °FCore. Hot mold plates and correct temperature profile are essential to attaining high gloss.
 110 - 130 °FCavity
Drying Temperature 180 °F2-3 hrs at 180°F or 4+ hours at 160°F.
Dry Time 2 - 3 hour
 
Descriptive Properties
ColorBlue

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