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EOS PA 1101
PA11PowderSLSEOS
Quick answer
EOS PA 1101 is a bio-based PA11 SLS powder derived from castor oil. Per the EOS data sheet it offers 50 MPa tensile strength (XY), 1650 MPa modulus and 30% elongation at break — its ductility and impact resistance, not stiffness, are the reason to choose it over PA12.
PA 1101 is EOS's polyamide 11 powder. PA11 is produced from castor oil, which makes it a bio-based polymer, and its molecular structure gives it a distinctly tougher character than PA12: EOS positions it for impact-resistant applications that must not splinter under load.
The headline number is elongation: 30% strain at break in X/Y (15% in Z) versus 18% (4% in Z) for PA 2200, at the same 1650 MPa modulus. That combination — PA12-like stiffness with much better ductility — is what clips, buckles and snap-fits need.
Properties (manufacturer datasheet)
| Property | Value | Test method / note |
|---|---|---|
| Tensile strength (X/Y) | 50 MPa | ISO 527-1/-2; Z: 48 MPa |
| Tensile modulus | 1650 MPa | ISO 527-1/-2, all orientations |
| Elongation at break (X/Y) | 30% | EOS "strain at break", ISO 527-1/-2; Z: 15% |
| Density | 1.03 g/cm³ | ISO 1183-1 |
| Melting temperature | 201 °C | ISO 11357-1/-3 |
Values are reproduced from the manufacturer source(s) listed below, exactly as published. Properties the manufacturer does not publish are omitted rather than estimated — see the sourcing policy.
Processing notes
- SLS powder for EOS polymer systems; values below are from the current EOS material data sheet.
- Melting temperature is 201 °C (ISO 11357-1/-3), noticeably higher than PA 2200's 176 °C, which is relevant when a service bureau runs both materials.
- Density is 1.03 g/cm³ per ISO 1183-1.
Typical applications
- Impact-resistant housings and coverings that must not splinter
- Clips, buckles and other parts needing high elongation at break
- Eyewear
- Functional parts that flex in service
Frequently asked questions
Is PA 1101 bio-based?
Yes. PA11 is polymerised from a monomer derived from castor oil, and EOS markets PA 1101 on that basis. The polymer itself behaves like a technical nylon; "bio-based" describes the feedstock, not biodegradability.
PA 1101 or PA 2200?
Choose PA 1101 when the part must bend, snap or survive impact: 30% elongation versus 18%, and 15% versus 4% in Z. Choose PA 2200 for general-purpose parts where its balanced profile and lower melting point are convenient. The full comparison is in the PA11 vs PA12 guide.
Is PA 1101 stronger than PA 2200?
In tensile strength, marginally: 50 MPa vs 48 MPa (XY). In stiffness they are equal at 1650 MPa. The meaningful differences are ductility and impact behaviour, where PA11 leads clearly.
Last updated: November 2026