Multi Jet Fusion Polypropylene For Chemical-Resistant, Weldable Parts

Mechanical performance

Mechanical properties

Read this group as a balance of stiffness and give. Tensile modulus shows how firmly a part resists bending: polypropylene is less stiff than PA12, so clips and thin walls deflect with less force, and load-bearing brackets need thicker sections than the same design in PA12. Tensile strength and stiffness are the same in XY and Z, so a part resists static load the same way whichever way it is built.

Elongation at break is higher in XY than in Z, so lay flexing features such as clips and latches in the XY plane. Notched impact strength shows how the material handles a sharp notch, so radius the roots of clips and bosses on parts that will be knocked.

Material makeup

Physical properties

Low density is the signature of polypropylene: parts weigh less than the same part in PA12 and are lighter than water, which keeps worn, handheld and moving parts light.

Powder values describe the HP 3D High Reusability PP feedstock. HP also publishes the melt flow index of the powder, which helps compare it with the moulding grade when printed parts are welded to moulded PP.

Heat performance

Thermal properties

Heat deflection temperature shows how warm a loaded part can run before it bends. Polypropylene holds its shape under light load well above room temperature, but its deflection temperature drops sharply under higher load, so size loaded parts that run warm from the 1.82 MPa value.

Compatibility data

Chemical properties

HP judges chemical resistance by mechanical property retention, dimensional stability and weight change after immersion, and publishes one overall result across the four chemical classes it tested, not a rating per class or per chemical.

HP names no individual fluids, so treat the result as screening guidance and confirm resistance with application-specific testing in the actual fluid, concentration and temperature before production release, especially for fuels and aromatic or chlorinated solvents.

Medical readiness

Biocompatibility and compliance profile

Each status comes from HP's regulatory summary for HP 3D High Reusability PP. A third-party laboratory tested parts printed on the Jet Fusion 5200/5210 from 80% reused powder with HP's agents, then sand blasted, soaked in isopropanol for 30 minutes and rinsed in deionized water, to ISO 10993-5, -10 and -11 and the USP pyrogen test, and HP expects similar parts to suit FDA and ISO 10993 guidance for intact-skin devices; each device maker tests its own device.

HP tested printed parts for RoHS substances, PAHs, phthalates, bisphenol A and soluble heavy metals under the ASTM F963 toy standard, and declares REACH registration and no intentionally added GADSL substances. HP states that no HP 3D material is approved for food contact, and it publishes no UL 94 rating for this grade.