Ultra-low density polypropylene plastic compound

An injection moldable composite material for use in a structural component comprising:

• a polypropylene blend comprising:
• a homopolymer polypropylene having a minimum ASTM D638 tensile strength of 4,000 psi in an amount between 40 wt. % and 70 wt. %;
• a high crystallinity homopolymer polypropylene having a minimum ASTM D638 tensile strength of 6,000 psi in an amount between 5 wt. % and 30 wt. %;
• and
• an impact copolymer having a rubber content greater than zero and less than 30 wt. % in an amount between 2 wt. % and 10 wt. %;
• a structural filler comprising glass fibers in the amount of 5.0 wt. % and hollow glass spheres in the amount of 4.0 wt. %;
• and
• at least one additive.

An injection moldable composite material for use in a structural component comprising:

• a polypropylene blend comprising:
• a homopolymer polypropylene having a minimum ASTM D638 tensile strength of 4,000 psi in an amount between 40 wt. % and 70 wt. %;
• a high crystallinity homopolymer polypropylene having a minimum ASTM D638 tensile strength of 6,000 psi in an amount between 5 wt. % and 30 wt. %;
• and
• an impact copolymer having a rubber content greater than zero and less than 30 wt. %, the impact copolymer being in an amount between 5.0 wt. % and 12.0 wt. %;
• chopped glass fibers in an amount between 1.0 and 10.0 wt. % and hollow glass spheres in an amount between 1.0 and 10.0 wt. %
• a coupling agent in an amount between 1.5 wt. % and 3 wt. %,
• a viscosity agent in an amount between 0.15 wt. % and 0.50 wt. %;
• an antioxidant in an amount between 0.1 wt. % and 0.5 wt. %;
• a UV stabilizer in an amount between 0.1 wt. % and 1.5 wt. %;
• and
• color additive in an amount between 1.0 wt. % and 3.0 wt. %.