GF Nylon-Like · grade
GF Nylon-Like Unfilled
Properties of the Unfilled condition, compared with the other GF Nylon-Like grades.
Pick when toughness, snap-fits and living hinges matter more than stiffness or HDT.
What is GF Nylon-Like Unfilled?
GF Nylon-Like Unfilled is GF Nylon-Like in the Unfilled grade — pick when toughness, snap-fits and living hinges matter more than stiffness or HDT. GF Nylon-Like Unfilled has a tensile strength of 50 MPa (7.25 ksi), stronger than 52% of polyurethane grades. Elongation at break is 25% and the elastic modulus is 1.8 GPa (0.261 Msi). GF Nylon-Like Unfilled has a density of 1.15 g/cm³ (0.0415 lb/in³), heavier than 63% of polyurethane grades. Its glass-transition temperature is 95°C (203 °F). GF-STD is the default condition FabDigit quotes; Unfilled is available on request or by drawing note.
Advantages
- Conducts heat well — 0.3 W/m·K (0.173 BTU/hr·ft·°F), better than 96% of polyurethane grades
- Low moisture uptake — 0.3%, better than 80% of polyurethane grades
Limitations
- Needs corrosion protection — 60/100, worse than 97% of polyurethane grades
GF Nylon-Like Unfilled properties
Typical room-temperature values for GF Nylon-Like Unfilled — 14 properties are specific to this condition; the rest are grade-level values shared by every GF Nylon-Like grade. Each bar shows where the value sits among the polyurethane grades in FabDigit's library — further right is higher.
Physical4
GF Nylon-Like Unfilled has a density of 1.15 g/cm³ (0.0415 lb/in³), heavier than 63% of polyurethane grades. Its glass-transition temperature is 95°C (203 °F).
Mechanical10
GF Nylon-Like Unfilled has a tensile strength of 50 MPa (7.25 ksi), stronger than 52% of polyurethane grades. Elongation at break is 25% and the elastic modulus is 1.8 GPa (0.261 Msi).
Thermal10
GF Nylon-Like Unfilled is rated for continuous service to 80°C (176 °F). It conducts heat at 0.3 W/m·K (0.173 BTU/hr·ft·°F), better than 96% of polyurethane grades. Thermal expansion is 110 µm/m·K (61.1 µin/in·°F).
Electrical5
GF Nylon-Like Unfilled is an electrical insulator with a dielectric strength of 18 kV/mm (457.2 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is good (60/100), worse than 97% of polyurethane grades. UV resistance is poor.
Sustainability4
Producing a kilogram of GF Nylon-Like Unfilled takes about 105 MJ of energy and emits 5.5 kg of CO₂ — more than 63% of polyurethane grades. Typical recycled content is 0%.
Manufacturability4
GF Nylon-Like Unfilled's machinability is very good (70/100, better than 67% of polyurethane grades).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other GF Nylon-Like grades and fills
GF Nylon-Like is also supplied in 6 other conditions. The full side-by-side table is on the GF Nylon-Like overview.
- GF-STDDefaultDefault choice for stiff, dimensionally stable vacuum-cast or cast-resin parts standing in for PA-GF injection mouldings.60 MPa tensile
- GF30Highest stiffness and lowest CTE of the family — for jigs, housings and pressure-loaded brackets where brittleness is acceptable.68 MPa tensile
- HTChoose for under-bonnet or paint-bake style exposure where 120 °C+ short excursions are expected; needs a longer high-temperature post-cure.65 MPa tensile
- GF15Middle ground: noticeably stiffer than unfilled while keeping some ductility and easier degassing/casting.55 MPa tensile
- UnfilledPick when toughness, snap-fits and living hinges matter more than stiffness or HDT.50 MPa tensile
Working with GF Nylon-Like Unfilled
Is GF Nylon-Like easy to machine?
Machines cleanly with sharp carbide or PCD tools at high speed/low feed, but the glass is abrasive and the dust is respirable — use vacuum extraction and expect fast edge wear.
Can GF Nylon-Like be welded?
Thermoset — cannot be melt-welded; join with 2-K PU/epoxy adhesive, solvent-free structural acrylic, or moulded-in threaded inserts.
Can GF Nylon-Like be formed, bent or molded?
Degas and pour under vacuum into silicone tooling at 40–70 °C; keep filler in suspension by stirring, demould in 20–60 min and post-cure 2–8 h at 70–100 °C for full Tg and dimensional stability.
What surface finishes work on GF Nylon-Like?
Sands and primes readily; takes 2-K PU paint, soft-touch coating and pad printing well, and can be vacuum-metallised after a base coat — glass at the surface limits high-gloss polishing.
GF Nylon-Like 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 (polyester/polyether component B)resin side of the 2-K system | 35 – 55 | 45 |
| glass fiber / milled glassmilled fiber or glass microspheres, silane sized | 10 – 40 | 25 |
| mineral filler / pigment / catalyst / adtin or amine catalyst, defoamer, colourant | 0 – 8 | 3 |
| isocyanate (MDI/pMDI prepolymer componenaromatic in standard grades; aliphatic in UV-stable grades | ≥ 25 (balance) | — |
GF Nylon-Like Unfilled — frequently asked
What is GF Nylon-Like Unfilled used for?
GF Nylon-Like Unfilled is typically used for structural brackets, functional structural prototypes, jigs and inspection fixtures, small-batch replacements for PA6/PA66-GF mouldings, housings and covers for rapid tooling and fan and gearbox covers. In short: stiffest cast PU; glass-filled-nylon-like rigidity.
What is the tensile strength of GF Nylon-Like Unfilled?
GF Nylon-Like Unfilled has a typical tensile strength of 50 MPa (7.25 ksi) — stronger than 52% of polyurethane grades. Strength varies by condition: see the 7 listed tempers.
Is GF Nylon-Like Unfilled easy to machine?
Yes — machinability is rated very good (70/100, better than 67% of polyurethane grades). Machines cleanly with sharp carbide or PCD tools at high speed/low feed, but the glass is abrasive and the dust is respirable — use vacuum extraction and expect fast edge wear.
Can GF Nylon-Like Unfilled be welded?
Thermoset — cannot be melt-welded; join with 2-K PU/epoxy adhesive, solvent-free structural acrylic, or moulded-in threaded inserts.
What surface finishes work on GF Nylon-Like Unfilled?
Sands and primes readily; takes 2-K PU paint, soft-touch coating and pad printing well, and can be vacuum-metallised after a base coat — glass at the surface limits high-gloss polishing.
Can GF Nylon-Like Unfilled be formed, bent or molded?
Degas and pour under vacuum into silicone tooling at 40–70 °C; keep filler in suspension by stirring, demould in 20–60 min and post-cure 2–8 h at 70–100 °C for full Tg and dimensional stability.
What is the maximum service temperature of GF Nylon-Like Unfilled?
GF Nylon-Like Unfilled is rated for continuous use to about 80°C (176 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in GF Nylon-Like Unfilled?
Yes — GF Nylon-Like Unfilled is available for urethane casting with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- Vacuum-casting polyurethane resin datasheets (nylon-like / glass-filled series) — Axson Technologies (Sika) (2021)
- Hei-Cast / Nihon Gosei PU casting resin technical data — H&K / Hei-Cast (2020)
- Handbook of Polyurethanes — CRC Press (2017)
- ISO 527 / ISO 178 / ISO 75 test methods for plastics — ISO (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.