Figure 4 FLEX-BLK 20 is a durable, flexible material. It is great for enclosures and high impact applications.

Fatigue Resistant Black Plastic, with the Look and Feel of Production Polypropylene

Figure 4® FLEX-BLK 20 is a flexible, high impact-resistant material for extremely durable black parts with the look and feel of production polypropylene. Great for functional prototypes, enclosures and assemblies, as well as short-run production parts, this fatigue resistant material provides outstanding flexibility and accuracy, enabling many applications.

  • Applications

    • Functional assemblies and prototypes
      • Automotive styling parts
      • Consumer goods and electronic components
      • Containers and enclosures
      • Product design
    • Master patterns for RTV/silicone molding
    • Concept and marketing models

  • Benefits

    • Reliable and robust functional prototypes
    • Excellent mechanical properties and accuracy
    • Beautiful black parts with look and feel of molded black polypropylene
    • Improved environmental stability of mechanical and performance properties over time

  • Features

    • High elongation at break and notched impact strength
    • Lower tensile modulus
    • Engineered for long term environmental stability
    • Easy to clean

  • Key Material Properties

    The full suite of mechanical properties are given per ASTM and ISO standards where applicable. All parts are conditioned per ASTM recommended standards for a minimum of 40 hours at 23 °C, 50% RH. Material properties include physical and mechanical properties, as well as thermal, UL flammability, and electrical (dielectric strength, dielectric constant, dissipation factor, and volume resistivity).

  • Isotropic properties

    Figure 4 technology prints parts that are isotropic in mechanical properties meaning the parts printed along either the XYZ axis will give similar results. Parts do not need to be oriented to get the highest mechanical properties, further improving the degree of freedom for part orientation for mechanical properties.

Long term environmental stability

Figure 4 FLEX-BLK 20 is engineered to give long term environmental UV and humidity stability. This means the material is tested for the ability to retain a high percent of the initial mechanical properties over a given period of time. This provides real design conditions to consider for the application or part. 

Below is a sampling of the dataset. The full datasheet includes Indoor and Outdoor Stability data for Tensile Strength, Elongation at Break, Tensile Modulus and Impact Strength. Actual data value is on Y-axis, and data points are % of initial value.

  • Indoor Stability

    Tested per ASTM D4329 standard method.

    Figure 4 FLEX-BLK 20 indoor elongation at break chart

  • Outdoor Stability

    Tested per ASTM G154 standard method.

    Figure 4 PRO-BLK 10 outdoor tensile strength chart

Chemical and automotive fluid compatibility

The compatibility of a material with hydrocarbons and cleaning chemicals is critical to part application. Figure 4 PRO-BLK 10 parts were tested for sealed and surface contact compatibility per ASTM D543 test conditions and per USCAR2 test conditions.  Tensile Strength (MPa) is shown below. The full datasheet includes additional data tables for Tensile Modulus, Elongation at Break and Notched Impact Strength.

  • Automotive Fluid Compatibility

    Figure 4 FLEX-BLK 20 automotive fluid tensile strength chart

  • Chemical Compatibility

    Figure 4 FLEX-BLK 20 chemical compatibility tensile strength chart

* Note: Not all products and materials are available in all countries – please consult your local sales representative for availability.

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Technical Specifications

  • Key Mechanical Properties

    • Elongation at break: 86%
    • Tensile modulus: 840 MPa
    • Impact strength (notched Izod): 91 J/m
    • Heat Deflection Temperature @ 0.455 MPa: 41°C

    Download the material technical specifications:

    Figure 4 FLEX-BLK 20 tech specs
    Figure 4 FLEX-BLK 20 tech specs A4
  • 3D Systems Figure 4 Flex BLK 20 door mechanism enclosure

    Fatigue resistant window clip in Figure 4 FLEX-BLK 20 for long-term performance.

  • Uncover the Power of an Advanced Materials Portfolio

    Download our Plastics material guide now and explore the range of advanced materials that exist to help you take advantage of a range of characteristics.

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