PBT PTFE-LUB
Additive grade
also Crastin, Pocan
Choose for sliding gears, cams and bushings needing low friction and wear without external lubrication.
Values for the PTFE-LUB condition
Other PBT grades and fills
PBT is listed in 10 conditions; see the grade overview at PBT.
Compare all 10 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Impact modified | Use where notch sensitivity or cold (-30 °C) impact is the failure mode — snap fits, exterior clips, mirror housings. | — | 42 | 200 | — |
PTFE-LUBThis page PTFE/silicone lubricated bearing grade | Choose for sliding gears, cams and bushings needing low friction and wear without external lubrication. | 48 | 48 | 20 | 78 Shore D |
Flame retardant, UL 94 V-0 | Choose for electrical housings, relay bases and connectors that must carry a UL 94 V-0 listing at 0.8–1.5 mm wall. | — | 52 | 8 | — |
Heat stabilized | Pick for automotive electrical parts that must survive thousands of hours at 130–150 °C without embrittlement. | 55 | 55 | 80 | 82 Shore D |
ESD / conductive | Use for static-dissipative fixtures, fuel-system and electronics handling parts requiring 10^4–10^9 Ω surface resistivity. | 60 | 60 | 5 | 84 Shore D |
Mineral / glass-mineral filled, low warpage | Choose for flat, dimensionally accurate covers and lids where isotropic shrinkage and good surface beat maximum strength. | — | 85 | 3 | — |
15% short glass fiber reinforced | Mid-way grade when you need roughly double the stiffness and 200 °C HDT but want lower warpage and better surface than GF30. | — | 95 | 3.5 | 85 HRM |
30% glass fiber, UL 94 V-0 | Standard for connectors, coil bobbins and switchgear needing both V-0 and >200 °C HDT with high stiffness. | — | 125 | 2.2 | — |
30% short glass fiber reinforced | The workhorse structural PBT: choose for stiff, creep-resistant, heat-resistant parts (connectors, housings, brackets) where warpage can be managed by gating. | — | 135 | 2.8 | 90 HRM |
40% short glass fiber reinforced | Maximum stiffness/strength PBT for metal-replacement structural parts; accept higher warpage, brittleness and tool wear. | — | 155 | 2.3 | — |
What is PBT PTFE-LUB?
PBT PTFE-LUB is PBT in the PTFE-LUB grade — choose for sliding gears, cams and bushings needing low friction and wear without external lubrication. PBT PTFE-LUB has a yield strength of 48 MPa (6.96 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 53% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.5 GPa (0.363 Msi). PBT PTFE-LUB has a density of 1.42 g/cm³ (0.0513 lb/in³), heavier than 83% of polymer grades. Its glass-transition temperature is 55°C (131 °F).
Advantages
- Low moisture uptake — 0.09%, better than 79% of polymer grades
- Conducts heat well — 0.27 W/m·K (0.156 BTU/hr·ft·°F), better than 78% of polymer grades
- Easy to machine — 72/100, better than 76% of polymer grades
Limitations
- Heavy — 1.42 g/cm³ (0.0513 lb/in³), worse than 83% of polymer grades
PBT PTFE-LUB properties
Typical room-temperature values for PBT PTFE-LUB; 27 are specific to this condition. Other listed values are PBT reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
PBT PTFE-LUB has a density of 1.42 g/cm³ (0.0513 lb/in³), heavier than 83% of polymer grades. Its glass-transition temperature is 55°C (131 °F).
Mechanical17
PBT PTFE-LUB has a yield strength of 48 MPa (6.96 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 53% of polymer grades. Elongation at break is 20% and the elastic modulus is 2.5 GPa (0.363 Msi).
Thermal11
PBT PTFE-LUB is rated for continuous service to 110°C (230 °F). It conducts heat at 0.27 W/m·K (0.156 BTU/hr·ft·°F), better than 78% of polymer grades. Thermal expansion is 80 µm/m·K (44.4 µin/in·°F).
Electrical7
PBT PTFE-LUB is an electrical insulator with a dielectric strength of 23 kV/mm (584.2 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (84/100), better than 58% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of PBT PTFE-LUB takes about 105 MJ of energy and emits 5 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 5%.
Manufacturability8
PBT PTFE-LUB's machinability is very good (72/100, better than 76% of polymer grades); weldability fair (35/100); formability poor (28/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PBT PTFE-LUB
Is PBT easy to machine?
Machines cleanly with sharp, positive-rake carbide tools and air cooling; glass-filled grades are abrasive and need diamond or coated tooling, and sharp internal corners must be avoided due to notch sensitivity.
Can PBT be welded?
Excellent for ultrasonic, hot-plate, vibration, spin and laser welding (with laser-transparent/absorbing pairs); no solvent bonding — use cyanoacrylate/epoxy on abraded, primed surfaces.
Can PBT be formed, bent or molded?
Dry to <0.02% moisture (120 °C, 3–4 h) to prevent hydrolytic MW loss; mold at 240–260 °C melt and 60–90 °C tool, fast fill, and expect anisotropic shrinkage in GF grades — gate to control warp.
What surface finishes work on PBT?
Takes pad printing and laser marking well; painting/metallizing needs plasma or primer pretreatment because of the low-energy, solvent-resistant surface; molded-in texture is usually preferred over polishing.
PBT 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 |
|---|---|---|
| 1,4-butanediol (BDO) unitdiol comonomer of the polyester backbone | ≈ 40 | 40 |
| glass fiber0 for unfilled default; 15/30/40 wt% in GF variants | 0 – 40 | 0 |
| flame retardant + synergistbrominated or halogen-free P-based system + Sb2O3 in FR V-0 grades | 0 – 20 | 0 |
| stabilizers / nucleant / pigmentantioxidant, hydrolysis stabilizer, mold release, carbon black | 0.2 – 2 | 0.8 |
| terephthalic acid / DMT unitdiacid comonomer; balance of resin | balance | — |
PBT PTFE-LUB — frequently asked
What is PBT PTFE-LUB used for?
PBT PTFE-LUB is typically used for automotive electrical connectors, relay and switch housings, coil bobbins and formers, automotive electronic control unit housings, appliance structural components and sensor bodies. In short: stronger precise PBT.
What is the yield strength of PBT PTFE-LUB?
PBT PTFE-LUB has a typical yield strength of 48 MPa (6.96 ksi) and a tensile strength of 48 MPa (6.96 ksi) — weaker than 53% of polymer grades. Strength varies by condition: see the 10 listed tempers.
Is PBT PTFE-LUB easy to machine?
Yes — machinability is rated very good (72/100, better than 76% of polymer grades). Machines cleanly with sharp, positive-rake carbide tools and air cooling; glass-filled grades are abrasive and need diamond or coated tooling, and sharp internal corners must be avoided due to notch sensitivity.
Can PBT PTFE-LUB be welded?
With care — weldability is rated fair (35/100). Excellent for ultrasonic, hot-plate, vibration, spin and laser welding (with laser-transparent/absorbing pairs); no solvent bonding — use cyanoacrylate/epoxy on abraded, primed surfaces.
What surface finishes work on PBT PTFE-LUB?
Takes pad printing and laser marking well; painting/metallizing needs plasma or primer pretreatment because of the low-energy, solvent-resistant surface; molded-in texture is usually preferred over polishing.
Can PBT PTFE-LUB be formed, bent or molded?
Dry to <0.02% moisture (120 °C, 3–4 h) to prevent hydrolytic MW loss; mold at 240–260 °C melt and 60–90 °C tool, fast fill, and expect anisotropic shrinkage in GF grades — gate to control warp.
What is the maximum service temperature of PBT PTFE-LUB?
PBT PTFE-LUB is rated for continuous use to about 110°C (230 °F), and briefly to 160°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in PBT PTFE-LUB?
Yes — PBT PTFE-LUB is available for injection molding with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ISO 7792-1/-2 Plastics — Thermoplastic polyester (TP) moulding and extrusion materials — ISO (2012)
- ASTM D5927 Standard Specification for Thermoplastic Polyester (TPES) Injection and Extrusion Materials — ASTM (2020)
- Ultradur (PBT) product range brochure and CAMPUS data — BASF (2023)
- Crastin PBT thermoplastic polyester resin product guide — Celanese (DuPont Performance Materials) (2023)
- Valox resin product data / processing guide — SABIC (2022)
- Pocan PBT technical information — LANXESS (2023)
- CAMPUS plastics database — PBT ISO 10350 single-point data — CWFG (2024)
- Engineered Materials Handbook Vol. 2: Engineering Plastics — ASM International (1988)
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.