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.