PU-FR-V0
PU-FR-V0 is a flame-retardant polyurethane casting resin (PX5620, Axson F35 FR) that meets UL94 V0 self-extinguishing requirements, typically through ATH mineral filling.
Reference datasheet — PU-FR-V0 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the V0-STD condition
PU-FR-V0 grades and fills
PU-FR-V0 is supplied in 7 conditions, soft to hard. V0-STD is the default FabDigit quotes; the values on this page are for it.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Flexible flame-retardant elastomeric grade | Pick for FR gaskets, cable grommets, keypads and over-moulded soft-touch parts on electrical prototypes. | 12 | 250 | 30 Shore D | |
Impact-modified / tough flame-retardant grade | Use for snap-fits, drop-tested enclosures and battery covers where V-0 must be combined with ductility. | 36 | 40 | 18 | 76 Shore D |
Halogen-free FR grade | Specify when halogen-free / low-smoke compliance is required alongside V-0 (rail, telecom, EU appliance programmes). | 42 | 44 | 5 | 84 Shore D |
Black pigmented FR grade | Pick when the part must be black out of the mould (no paint) — e.g. connector housings, power-tool shells. | 44 | 46 | 6 | 82 Shore D |
V0-STDDefault Standard rigid ABS-like FR casting grade | Default choice for electrical enclosures and appliance housings needing V-0 at 1.5–3 mm with ABS-like stiffness. | 48 | 6 | 82 Shore D | |
Mineral / glass-filled flame-retardant grade | Choose for stiff, dimensionally stable FR housings and brackets where higher density and lower impact are acceptable. | 50 | 2 | 87 Shore D | |
High-heat flame-retardant casting grade | Use when the FR part sees 100–120 °C (lamp bases, power supplies, under-hood electrical prototypes); needs long oven post-cure. | 55 | 3.5 | 85 Shore D |
What is PU-FR-V0?
PU-FR-V0 is a flame-retardant polyurethane casting resin (PX5620, Axson F35 FR) that meets UL94 V0 self-extinguishing requirements, typically through ATH mineral filling. With a density of 1.6, 48 MPa tensile strength, 6 % elongation, Shore D 82 and service to 80 °C, it is used for electrical enclosure and appliance prototypes that must pass flammability checks. Strength is lower than unfilled PU, the filler is abrasive (machinability score 65), the thermoset cannot be welded and aromatic MDI systems yellow in sunlight. V0-STD, V0-BK, V0-HT, V0-MF, V0-IM, V0-FLEX and V0-HF conditions are on file; use PU-HighTemp where higher HDT rather than FR is the driver. PU-FR-V0 has a density of 1.6 g/cm³ (0.0578 lb/in³), heavier than 100% of polyurethane grades. Its glass-transition temperature is 85°C (185 °F). PU-FR-V0 has a tensile strength of 48 MPa (6.96 ksi), weaker than 52% of polyurethane grades. Elongation at break is 6% and the elastic modulus is 2.6 GPa (0.377 Msi).
What is PU-FR-V0 used for?
- Electrical enclosure prototypes
- Appliance housings
- Connector housings
- Safety-critical casings
Advantages
- Low moisture uptake — 0.25%, better than 93% of polyurethane grades
- Conducts heat well — 0.25 W/m·K (0.144 BTU/hr·ft·°F), better than 90% of polyurethane grades
- Stiff — 2.6 GPa (0.377 Msi), better than 83% of polyurethane grades
- Low, predictable mold shrinkage — 0.2%, better than 75% of polyurethane grades
Limitations
- Heavy — 1.6 g/cm³ (0.0578 lb/in³), worse than 100% of polyurethane grades
- Limited ductility — 6%, worse than 83% of polyurethane grades
PU-FR-V0 properties
Typical room-temperature values for PU-FR-V0-V0-STD; bars are the position among polyurethane grades.
Physical4
PU-FR-V0 has a density of 1.6 g/cm³ (0.0578 lb/in³), heavier than 100% of polyurethane grades. Its glass-transition temperature is 85°C (185 °F).
Mechanical10
PU-FR-V0 has a tensile strength of 48 MPa (6.96 ksi), weaker than 52% of polyurethane grades. Elongation at break is 6% and the elastic modulus is 2.6 GPa (0.377 Msi).
Thermal10
PU-FR-V0 is rated for continuous service to 80°C (176 °F). It conducts heat at 0.25 W/m·K (0.144 BTU/hr·ft·°F), better than 90% of polyurethane grades. Thermal expansion is 80 µm/m·K (44.4 µin/in·°F).
Electrical7
PU-FR-V0 is an electrical insulator with a dielectric strength of 20 kV/mm (508 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (70/100), worse than 74% of polyurethane grades. UV resistance is poor.
Sustainability4
Producing a kilogram of PU-FR-V0 takes about 100 MJ of energy and emits 5.2 kg of CO₂ — less than 83% of polyurethane grades. Typical recycled content is 0%.
Manufacturability6
PU-FR-V0's machinability is good (65/100, better than 62% of polyurethane grades); weldability not recommended (0/100); formability not recommended (5/100).
Common Calculations4
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the polyurethane family
Yield strength against density for every polyurethane grade FabDigit runs. PU-FR-V0 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with PU-FR-V0
Is PU-FR-V0 easy to machine?
Machines and drills easily with sharp carbide tools and vacuum extraction, but ATH filler is abrasive and the dust must be captured; avoid heat build-up which softens the surface.
Can PU-FR-V0 be welded?
Thermoset — cannot be welded; join with two-part PU or epoxy adhesive, or cast-in inserts.
Can PU-FR-V0 be formed, bent or molded?
Degas both components, mix and pour under vacuum into silicone moulds at 40–50 °C; short pot life (2–5 min) and high filler viscosity demand fast pouring and 60–70 °C oven post-cure for full FR and HDT properties.
PU-FR-V0 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| polyol (polyether/polyester blend, B-sidresin side incl. catalyst, defoamer, pigment | 35 – 55 | 45 |
| aluminium trihydrate (ATH) flame retardaprimary halogen-free FR/smoke suppressant | 10 – 30 | 18 |
| phosphorus flame retardant (phosphate/phgas- and condensed-phase synergist | 2 – 8 | 4 |
| mineral filler / pigmentTiO₂, talc, carbon black depending on colour | 0 – 5 | 2 |
| MDI-based polyisocyanate prepolymer (A-saromatic MDI; yellowing under UV | ≥ 25 (balance) |
What surface finishes work on PU-FR-V0?
Sands and primes well; paint or soft-touch coat for colour and UV protection, since aromatic MDI systems yellow in sunlight; texture is replicated directly from the silicone mould.
Equivalent designations
Standards and trade names that resolve to PU-FR-V0 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- UL94 V0 PU Resin
How much does PU-FR-V0 cost?
PU-FR-V0 is a high-cost polyurethane ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
PU-FR-V0 — frequently asked
What is PU-FR-V0 used for?
PU-FR-V0 is typically used for electrical enclosure prototypes, appliance housings, connector housings and safety-critical casings. In short: UL94 V0 cast PU; flame-retardant enclosure prototypes; filled, higher-density PU.
What is the tensile strength of PU-FR-V0?
PU-FR-V0 has a typical tensile strength of 48 MPa (6.96 ksi) — weaker than 52% of polyurethane grades. Strength varies by condition: see the 7 listed tempers.
Is PU-FR-V0 easy to machine?
Reasonably — machinability is rated good (65/100, better than 62% of polyurethane grades). Machines and drills easily with sharp carbide tools and vacuum extraction, but ATH filler is abrasive and the dust must be captured; avoid heat build-up which softens the surface.
Can PU-FR-V0 be welded?
Not readily — weldability is rated not recommended (0/100). Thermoset — cannot be welded; join with two-part PU or epoxy adhesive, or cast-in inserts.
What surface finishes work on PU-FR-V0?
Sands and primes well; paint or soft-touch coat for colour and UV protection, since aromatic MDI systems yellow in sunlight; texture is replicated directly from the silicone mould.
Can PU-FR-V0 be formed, bent or molded?
Degas both components, mix and pour under vacuum into silicone moulds at 40–50 °C; short pot life (2–5 min) and high filler viscosity demand fast pouring and 60–70 °C oven post-cure for full FR and HDT properties.
What is the maximum service temperature of PU-FR-V0?
PU-FR-V0 is rated for continuous use to about 80°C (176 °F), and briefly to 110°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between PU-FR-V0 V0-STD and PU-FR-V0 V0-BK?
V0-STD is the default condition — default choice for electrical enclosures and appliance housings needing V-0 at 1.5–3 mm with ABS-like stiffness. V0-BK: pick when the part must be black out of the mould (no paint) — e.g. connector housings, power-tool shells.
How much does PU-FR-V0 cost?
PU-FR-V0 is a high-cost polyurethane ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- PX5620 flame-retardant polyurethane casting system TDS — Axson Technologies / Sika (2021)
- F-series FR vacuum casting resins technical data — Axson Technologies (2020)
- UL 94 — Tests for Flammability of Plastic Materials for Parts in Devices and Appliances — UL Solutions (2023)
- ISO 527 / ISO 178 / ISO 75 plastics test methods — ISO (2019)
- Engineered Materials Handbook Vol. 2: Engineering Plastics (polyurethane thermosets) — ASM International (1988)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.