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Introduction to Polypropylene


Polypropylene (PP) is a material that is typically white and translucent and is resistant to corrosion while also possessing good toughness. Its most notable characteristic is its versatility, as it is suitable for use in a variety of processing methods and applications. The material's value and versatility can be attributed to its outstanding chemical resistance, being the bulk thermoplastic with the lowest density and highest melting point, and its moderate cost. To enhance its blow molding and thermoforming properties, high melt strength grades of PP have been created.

Information of Polypropylene

Polypropylene is a common materials for parts machining and manufacturing,below is some common information about Polypropylene.




ProcessCNC machining, injection molding

With drawing: as low as +/- 0.005 mm No drawing: ISO 2768 medium


Containers, laboratory equipment



Material Properties

There are common Subtypes of Polypropylene.


Tensile Strength

Yield Strength

Elongation at Break


Maximum Temp


23 – 33 MPa

30 – 32 MPa

8 – 12 %

65 – 102 HRR

80 – 130 °C


68 – 85 MPa

2.1 – 3.4 %

110 HRC

100 °C

Surface Finishes for Your Choosing

NOBLE has more than ten years of experience in surface treatment and excellent engineers, who are proficient in surface treatment of plastics, metals, and composite materials, and can turn your dream prototype or parts into reality.

Name Description
As Machined

As Machined

Coming out of the machine after machining, our parts are cleaned of any sharp edges and burrs while retaining marks. Without any added material, the part had a surface roughness of 3.2 μm (126 μin).

Band Blasting

Band Blasting

Band blasting cleans the surface of any impurities and peels coating through the propelling of blast media streams over the parts.



To increase surface hardness and dissipate heat, we use anodizing techniques to enhance the look of parts and blend well for painting and priming.



Electroplating reduces metal cations in the electrolyte solution, producing a metallic coating on a metal surface. This process can be used for purposes of corrosion and wear resistance, as well as for decorative purposes.



Working on metal and hard plastics, our polishing uses highly efficient machinery to get our parts between Ra 0.8~Ra0.1 for a cleaner surface.

Powder coating

Powder coating

We apply a thin layer of protective polymer with the corona discharge phenomenon to give our part a lasting finish that protects from impacts and prevents wearing down.



Our brushing technique uses abrasive belts over the material to create diverse patterns that match the parts’ structure and color.



Painting involves Spray droplets can be dispersed uniformly or in fine amounts to cover a wide surface area and bring out greater color to the part.

Black Anodized

Black Anodized

Adding layers to metallic surfaces like steel, our black anodized technique improves appearance while maintaining durability.



We use chromate conversion coating or alodine to protect aluminum and other materials from corrosive elements, usually done before priming and painting parts.

Laser Carving

Laser Carving

Helpful in brand recognition or parts organization, we use laser carving that applies various printing methods during full-scale production to quickly embed barcodes, lettering and logos on the parts.

Gallery of Parts