PP Polypropylene Machining Service

Get high precision and consistency machined polypropylene (PP) with strong chemical resistance and low moisture absorption.

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We Offer Polypropylene Machining Services Specific to Your Needs!

PP (polypropylene) is lightweight, chemical resistance, and easy to work with. We can machined PP material from fluid-handing components to simple structural parts. It's not the toughest plastic out there, but if your application doesn't demand high strength, PP offers great value and performance.

Rapid prototyping and low-volume production
Tight-tolerance machining down to ±0.05mm
Post-processing: tapping, threading, polishing
Custom surface finishes and inserts
Fast turnaround and responsive engineering support

What is Machined Polypropylene

Machined polypropylene is a soft, flexible thermoplastics, it is easy to machined but need careful handling to avoid string or surface roughness. Machined PP parts doesn’t need expensive tooling, it is a good choice for small batches, prototypes, or custom designs.

Machined PP Grades We Work With

We work with seveal types of polypropylene that are suitable for CNC machining. Each one has slightly different properties depending on its formulation. Here are the main types we offer.

Homopolymer PP: This is commonly used for general-purpose parts, it offers slightly higher strength and stiffness.
Copolymer PP: It is a bit softer and more impact-resistant than homopolymer. We use it for parts that need to flex without breaking.
Glass-filled PP: The reinforced with glass fibers improves stiffness and demensional stability. We use this type to machine parts that require tighter tolerances or added strength.
Food-grade PP: It is safe for food contact. We machine this type for clients mostly in food processing.

Types of PP Machining We Offer

Machined Polypropylene Properties

Here are the key machined polypropylene properties, the data shall change based on PP grade and the adding filler.

Item	Value
Density	0.90 – 0.91g/cm³
Tensile Strength	30 – 40MPa
Flexural Modulus	1,000 – 1,500MPa
Izod Impact (Notched)	50 – 150J/m
Elongation at Break	200 – 600%
Melting Point	160 – 170°C
Water Absorption (24h)	< 0.01%

Key Benefits of Polypropylene Machining
With excellent chemical resistance, PP is resitance to wide range of acids, alkalis, and solvents.
PP has low moisture absorption, it can resistance to water and humidity which make it suitable for outdoor or high-humidity environments
PP is one of the lightest thermoplastics, meanwhile, it maintains impact resistance and flexibility under stress.
It is suible for non-conductive componets as PP has high dielectric strength and excellent electrical insulating properties.
Compared to other engineering plastics, PP has relatively low material cost.

Shortcomings of Polypropylene Machining
PP has a relatively high thermal expansion rate and low stiffness, so it has poor dimensional stability for tight tolerances.
It scratches and dents more easily than harder plastics like acetal or nylon as PP has low surface hardness.
PP softens quickly under sustained heat, so it is not suitable for high-temperature applications.
PP is difficult to bond or paint without surface treatment, it is not suitable for bonded featured products.