MXD6 · grade
MXD6 Unfilled
Properties of the Unfilled condition, compared with the other MXD6 grades.
Choose for gas-barrier layers, blends with PET/PA6 and thin-wall parts where stiffness of neat resin suffices.
What is MXD6 Unfilled?
MXD6 Unfilled is MXD6 in the Unfilled grade — choose for gas-barrier layers, blends with PET/PA6 and thin-wall parts where stiffness of neat resin suffices. MXD6 Unfilled has a tensile strength of 100 MPa (14.5 ksi), stronger than 89% of polymer grades. Elongation at break is 3% and the elastic modulus is 4.3 GPa (0.624 Msi). MXD6 Unfilled has a density of 1.22 g/cm³ (0.0441 lb/in³), heavier than 61% of polymer grades. Its glass-transition temperature is 88°C (190 °F). GF30 is the default condition FabDigit quotes; Unfilled is available on request or by drawing note.
Advantages
- Stiff — 4.3 GPa (0.624 Msi), better than 87% of polymer grades
Limitations
- Limited ductility — 3%, worse than 83% of polymer grades
- Limited formability — 15/100, worse than 80% of polymer grades
- High embodied carbon — 7.5 kg CO₂/kg, worse than 79% of polymer grades
- Absorbs moisture — dry before molding — 0.6%, worse than 76% of polymer grades
MXD6 Unfilled properties
Typical room-temperature values for MXD6 Unfilled — 21 properties are specific to this condition; the rest are grade-level values shared by every MXD6 grade. Each bar shows where the value sits among the polymer grades in FabDigit's library — further right is higher.
Physical5
MXD6 Unfilled has a density of 1.22 g/cm³ (0.0441 lb/in³), heavier than 61% of polymer grades. Its glass-transition temperature is 88°C (190 °F).
Mechanical9
MXD6 Unfilled has a tensile strength of 100 MPa (14.5 ksi), stronger than 89% of polymer grades. Elongation at break is 3% and the elastic modulus is 4.3 GPa (0.624 Msi).
Thermal10
MXD6 Unfilled is rated for continuous service to 90°C (194 °F). It conducts heat at 0.23 W/m·K (0.133 BTU/hr·ft·°F), better than 64% of polymer grades. Thermal expansion is 70 µm/m·K (38.9 µin/in·°F).
Electrical6
MXD6 Unfilled is an electrical insulator with a dielectric strength of 25 kV/mm (635 V/mil) and a resistivity of 1×10¹² Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (80/100), worse than 55% of polymer grades. UV resistance is poor.
Sustainability3
Producing a kilogram of MXD6 Unfilled takes about 130 MJ of energy and emits 7.5 kg of CO₂ — more than 78% of polymer grades. Typical recycled content is 0%.
Manufacturability6
MXD6 Unfilled's machinability is good (60/100, better than 51% of polymer grades); weldability good (55/100); formability poor (15/100).
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Other MXD6 grades and fills
MXD6 is also supplied in 7 other conditions. The full side-by-side table is on the MXD6 overview.
- GF30DefaultStandard structural injection grade: best balance of stiffness, strength, toughness and moldability.200 MPa tensile
- GF60Highest modulus/lowest CTE variant for thin-wall metal replacement; brittle, abrasive on tooling, poor surface.270 MPa tensile
- GF50Choose when metal-replacement stiffness and creep resistance dominate over toughness and surface finish.250 MPa tensile
- CF30Choose for lightweight high-stiffness parts or when static-dissipative surface resistivity is required.240 MPa tensile
- GF-FR-V0Pick for electrical/electronic housings and connectors needing UL 94 V-0 at 0.8–1.6 mm.165 MPa tensile
- GF-MINUse for flat, dimensionally critical parts where glass-only grades warp; trades some strength for isotropy and surface quality.150 MPa tensile
- UnfilledChoose for gas-barrier layers, blends with PET/PA6 and thin-wall parts where stiffness of neat resin suffices.95 MPa yield · 90 HRM
Working with MXD6 Unfilled
Is MXD6 easy to machine?
Machinable with carbide/PCD tooling but glass fiber is highly abrasive — use sharp tools, high speed, low feed and air cooling to avoid melting and delamination.
Can MXD6 be welded?
Joins well by ultrasonic, hot-plate, laser and vibration welding (glass content reduces weld strength ~30–50%); adhesive bonding needs plasma or primer pretreatment.
Can MXD6 be formed, bent or molded?
Injection mold only: dry pellets to <0.1% moisture, melt 255–285 °C with short residence time, mold 120–145 °C for full crystallization; avoid melt >290 °C to prevent gelation/discoloration.
What surface finishes work on MXD6?
Accepts painting and vacuum metallizing after degreasing; glass-rich surfaces show fiber read-through, so use textured tooling, and laser marking gives good contrast.
MXD6 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 |
|---|---|---|
| m-xylylenediamine (MXDA) unitdiamine repeat unit of the polyamide backbone (unfilled basis) | ≈ 45 | 45 |
| adipic acid unitdiacid repeat unit (unfilled basis) | ≈ 55 | 55 |
| glass fiberchopped E-glass, silane sized (default GF30 variant) | 28 – 32 | 30 |
| MXD6 polyamide matrixbalance of compound plus heat/process stabilizers and lubricants (<1%) | balance | — |
MXD6 Unfilled — frequently asked
What is MXD6 Unfilled used for?
MXD6 Unfilled is typically used for engine covers, mirror brackets, structural brackets and housings replacing metal, barrier layers in packaging film and bottles, gears and drive components and power tool housings and frames. In short: barrier glass-filled nylon.
What is the tensile strength of MXD6 Unfilled?
MXD6 Unfilled has a typical tensile strength of 100 MPa (14.5 ksi) — stronger than 89% of polymer grades. Strength varies by condition: see the 8 listed tempers.
Is MXD6 Unfilled easy to machine?
Reasonably — machinability is rated good (60/100, better than 51% of polymer grades). Machinable with carbide/PCD tooling but glass fiber is highly abrasive — use sharp tools, high speed, low feed and air cooling to avoid melting and delamination.
Can MXD6 Unfilled be welded?
Yes — weldability is rated good (55/100). Joins well by ultrasonic, hot-plate, laser and vibration welding (glass content reduces weld strength ~30–50%); adhesive bonding needs plasma or primer pretreatment.
What surface finishes work on MXD6 Unfilled?
Accepts painting and vacuum metallizing after degreasing; glass-rich surfaces show fiber read-through, so use textured tooling, and laser marking gives good contrast.
Can MXD6 Unfilled be formed, bent or molded?
Injection mold only: dry pellets to <0.1% moisture, melt 255–285 °C with short residence time, mold 120–145 °C for full crystallization; avoid melt >290 °C to prevent gelation/discoloration.
What is the maximum service temperature of MXD6 Unfilled?
MXD6 Unfilled is rated for continuous use to about 90°C (194 °F), and briefly to 200°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in MXD6 Unfilled?
Yes — MXD6 Unfilled is available for injection molding with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- MX Nylon (MXD6) and Reny reinforced polyamide grade data & processing guide — Mitsubishi Gas Chemical (2023)
- Semi-aromatic polyamide (PA MXD6) property sets — CAMPUS Plastics (2023)
- Engineering Plastics — polyamides, structure and properties — ASM International / Polymer Data Handbook (2009)
- 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.