Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources3 documents: LyondellBasell, Formlabs, INEOS Olefins & Polymers USA
Plastic Polypropylene
LyondellBasell Moplen HP501H polypropylene homopolymer (general purpose), typical ISO values
SLA Resin Tough 2000
Formlabs Tough 2000 Resin V2 (FLTO2002), TDS Rev. 01 10/06/2025; printed on Form 4 at 100 µm, washed in Form Wash V2 10+5 min in >=99% IPA, post-cured 70 °C for 12 min in Form Cure V2. Orientation not stated.
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Moplen HP501H Product DataLyondellBasellPlastic Polypropylene · Yield strength: typical, tensile stress at yield ISO 527Plastic Polypropylene · Young's modulus (stiffness): typical, tensile modulus ISO 527Plastic Polypropylene · Density: typical, 23 °C ISO 1183-1Plastic Polypropylene · Max service temperature: HDT 0.45 MPa (ISO 75B), unannealed
Typical Engineering Properties of PolypropyleneINEOS Olefins & Polymers USAarchived copyPlastic Polypropylene · Poisson's ratio: base material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)Plastic Polypropylene · Thermal conductivity: base material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)Plastic Polypropylene · Thermal expansion: base material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
SLA Resin Tough 2000 is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Mechanical
Is Plastic Polypropylene stronger than SLA Resin Tough 2000?
SLA Resin Tough 2000 is stronger: its yield strength is 40.4 MPa against 33 MPa for Plastic Polypropylene (22%).
Which is lighter, Plastic Polypropylene or SLA Resin Tough 2000?
Plastic Polypropylene is lighter: 900 kg/m³ against 1,090 kg/m³ for SLA Resin Tough 2000.
Which is stiffer, Plastic Polypropylene or SLA Resin Tough 2000?
SLA Resin Tough 2000 is stiffer: Young's modulus 1.8 GPa against 1.45 GPa for Plastic Polypropylene, so the same part in SLA Resin Tough 2000 deflects less under the same load.
Which is lighter for the same job, Plastic Polypropylene or SLA Resin Tough 2000?
For the same stiffness or strength: Plastic Polypropylene is lighter for a stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; SLA Resin Tough 2000 is lighter for a stiff rod or tie (tension), strong rod or tie.
Part that must be
Plastic Polypropylene
SLA Resin Tough 2000
Stiff rod or tie (tension)
2% heavier
lighter
Stiff beam (bending)
lighter
9% heavier
Stiff panel or plate
lighter
13% heavier
Strong rod or tie
1% heavier
lighter
Strong beam
lighter
6% heavier
Strong panel or plate
lighter
9% heavier
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Thermal
Which expands less with temperature?
Plastic Polypropylene expands less: 90 µm/m·K against 134 µm/m·K for SLA Resin Tough 2000.