SRPP (Glass-Filled Polypropylene)

SRPP is a glass-filled polypropylene sheet material commonly used in FRC, often supplied or popularized through vendors like West Coast Products.

What It Is

SRPP is a reinforced plastic made from:

• Polypropylene base material
• Glass fiber reinforcement

This combination makes it significantly stronger and stiffer than standard plastic sheet.

Why FRC Teams Use SRPP

SRPP is used because it:

• Is lightweight compared to aluminum
• Has good stiffness for a plastic material
• Is impact resistant and durable
• Does not crack as easily as brittle plastics
• Is easy to cut and machine

Common Applications

• Robot structural plates
• Mounting plates and brackets
• Intake side plates
• Lightweight gearbox or mechanism plates
• Non-metal structural components

Manufacturing Notes

• Don't cut it with the CNC, use the laser cutter instead.
• Drills cleanly with proper speed and sharp bits if you heat up the edges with the flamethrower afterwards.
  
• Works well with bolts and rivets if you use large washers

Limitations

• Not as strong as aluminum in high-load structural areas
• Can flex under heavy drivetrain loads
• Edge quality matters for strength (avoid rough cuts)

Key Idea

SRPP is a lightweight, glass-filled plastic sheet material used in FRC as a strong alternative to aluminum plates in lower-to-medium load applications, especially where weight savings matter.