PP (Polypropylene) is a lightweight thermoplastic with good mechanical strength, high chemical resistance, and heat resistance. It has moderate impact strength, is waterproof, and is easy to process. Due to its stability and recyclability, PP is widely used in packaging, automotive parts, medical devices, household goods, and piping.
Characteristics and Features:
Good Chemical Resistance: Resistant to many acids, bases, and solvents.
Good Mechanical Strength and Stiffness: Harder than PE but still has some flexibility.
Good Heat Resistance: Can withstand higher temperatures than PE, typically up to around 100°C.
Good Electrical Insulation: An electrical insulator.
Low Coefficient of Friction: Smooth surface.
Good Fatigue Resistance: Can withstand repeated bending and twisting.
Lightweight: Low specific gravity.
Low Cost: A type of plastic with low production costs.
Corresponding CNC Technologies:
CNC Milling: Commonly used for machining PP. Sharp cutting tools are needed for a good cutting surface and to avoid burrs.
CNC Turning: Cylindrical parts can be turned from PP.
CNC Cutting: Suitable for cutting PP sheets into various shapes.
Notes:
PP has a relatively large coefficient of thermal expansion, which needs to be considered when machining high-precision parts.
Due to its flexibility, thin parts may vibrate during machining.
The adhesive bonding ability of PP is not as good as some other plastics.
Conclusion: PP is commonly CNC machined to create parts for the chemical, food, medical, and other industrial applications due to its chemical resistance and good durability.
