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As a China provider of polypropylene CNC machining services, we can customize precision PP plastic parts for many industries. From prototyping to manufacturing precision CNC machined polypropylene components, we can produce a wide variety of products for the convenience of our consumers. With our machining services, you can also machine other plastic materials like polycarbonate, polyethylene, PEEK, and POM. Contact us today to get started on your project!
Polypropylene (PP) is an economical material that offers a combination of outstanding physical, chemical, mechanical, thermal, and electrical properties not found in any other thermoplastic. At Anpllocnc, we’re your number one source for polypropylene machining, creating a wide variety of parts for your needs within any system. To handle your requests, we operate highly capable CNC machines, perfect for handling very precise polypropylene milling. Compared to low or high density polyethylene, polypropylene has a lower impact strength, superior working temperature, and greater tensile strength. Polypropylene has excellent chemical resistance in corrosive environments where there are organic solvents, degreasing agents, or electrolytic attack, but poor resistance to aromatic, aliphatic and chlorinated solvents. It is lightweight, non-staining, and exhibits a low moisture absorption rate. It’s ideal for the transfer of hot liquids and gases, and in vacuum system atmospheres with high heat and pressure. Polypropylene Material Properties Chart When handling polypropylene machining, you’ll find two different types are available for use: Homopolymer or Copolymer. Although similar, each exhibits distinct differences in both appearance and performance.
| Processes | Lead Time | Colors | Tolerance | Price | Applications |
| CNC Mill CNC Lathe | As fast as 3 days | White (semi-clear or opaque) | With drawing: as low as +/- 0.005 mm No drawing: ISO 2768 medium | $ | Containers, laboratory equipment |
Polypropylene, or PP for short refers to a family of semi-rigid thermoplastics that are white and odorless. Polypropylene (PP) is a BPA-free, lightweight plastic with exceptional fatigue resistance and toughness. They also possess excellent physical properties such as high strength at low temperature, good resistance against chemical exposure withstanding heat up to 200℃ (392 °F). Polymers made from these materials have been rapidly adopted by sectors including automotive manufacturing,packing,machinery, automobiles, electronic appliances, construction, textiles, agriculture, due their combination set of desirable performance characteristics .
The chemical formula is (C3H6)n,
density is 0.89~0.91g/cm3,
flammable, melting point 189℃,
softening at 155℃,
use temperature range is -30~140℃.
It can resist the corrosion of acid, alkali, salt liquid, and many kinds of organic solvents below 80℃, and can decompose under the effect of high temperature and oxidation.
Polypropylene is widely used in the production of garments, blankets, and other fiber products, medical equipment, automobiles, bicycles, parts, conveying pipes, chemical containers, etc. It is also used in food and drug packaging.
And our CNC milling and turning capabilities enable us to produce complex shapes and designs for polypropylene parts with high accuracy and precision.Whether it’s a small or large batch, we can handle orders of any size. And we ensure that every component undergoes rigorous quality control procedures to meet your specifications and standards.We also offer injection molding services for PP parts. Our Injection molding machines can easily handle parts of varying sizes and shapes.
Our staff will work with you from your initial inquiry through delivery of your finished part to ensure that your part meets or exceeds your specifications.
PP’s main advantage is its outstanding processing performance. It can be injection molding or CNC machined, such as PP capsules.PP is always CNC machined from sheet material. CNC machining could make prototypes and small batch PP parts with high precision tolerances.Polypropylene (PP) more suitable for CNC machining, turning, milling or drilling. CNC machining method could makes Polypropylene (PP) with very tight tolerances.Blow are some characteristics for Polypropylene (PP) in CNC machining:
Chemical resistance: PP will not react in any acids,so it could make liquids. Elasticity and toughness:
PP is generally considered to be a tough material because it can withstand deformation within certain limits and does not break apart when stressed.
Fatigue resistance: PP retains its shape after a lot of twisting and bending test. This feature is particularly valuable for making living hinges.
Insulation: PP material is a high resistance and insulating material.
Polypropylene components have an inherent off-white hue and are not conducive to surface treatments like painting. Additionally, due to its hydrophobic properties, PP is extremely resistant to dyeing.
1. As Machined: Leaving the part in an as-machined state is the most common surface finishing option for those employing CNC machining in polypropylene.
2. Bead Blast: Polypropylene can leave burrs on part edges during CNC machining, and the material is prone to melting when in contact with the cutting tool. This often results in a surface finish that is not up to par, requiring additional sanding with coarse sandpaper or media.
3.Polypropylene is a semi-clear white color by default, but can also come in opaque white on request.
| Min Wall Thickness | Min End Mill Size | Min Drill Size | Max Part Size | Undercuts | Radii : Depth |
| 0.5 mm | 0.8 mm (0.03 in) | 0.5 mm (0.02 in) | 1200 x 500 x 152 mm [x,y,z] (mill) 152 x 394 mm [d,h] (lathe) | Square profile, full radius, dovetail profiles | Depth must not exceed 12x drill bit diameter. For end mills, depth must not exceed 10x tool diameter. |
Polyethylene is available as a Homopolymer (PPH) and Copolymer (PPC). Material selection may depend on application and desired properties although the attributes are very similar and they are largely interchangable materials. Here is a brief overview of each.
Homopolymer Polypropylene
PPH is the more widely used general-purpose grade of Polypropylene. It has improved chemical resistance and stiffness and also has a higher working temperature than the PPC variation (0-100°C). It is slightly more expensive than PPC although still relatively inexpensive.
Copolymer Polypropylene
Although PPC has a relatively lower chemical resistance than PPH, it is still considered to be very good. Its operating temperature range is not as high (up to 80°C) but it has improved impact strength at lower temperatures (down to -20°C).
It also has lower susceptibility to stress cracking. Whilst both are suitable for use with food, the copolymer is more commonly selected for food-related applications. PPC is more transparent than PPH and generally used where more flexibility is required.
PPC can be further divided into random and block copolymers, produced by the polymerizing of propene and ethane.
Random Copolymers
Random copolymers features up to 6% Ethene which is randomly dispersed. They are flexible and optically clear.
Block Copolymers
Block copolymers feature between 5 and 15% ethane and the co-monomer units are arranged in a regular pattern, making it tougher and less brittle.
Anpllocnc Company are the plastic machining experts. Our CNC milling, CNC routing, and CNC turning capabilities enable us to produce custom machined polypropylene parts and components that match your exact designs.
Request a quote today or contact us to discuss your project.
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