OBC
Olefin Block Copolymer
3 products from 3 makers. Bambu Lab does not list this material for the H2C; its published process temperatures are within the printer's limits.
- Tensile modulus (XY)
- 0.2GPa
- one product
- Tensile strength (XY)
- 12MPa
- 2 products · 10–14
- Tensile strength (Z)
- 11MPa
- 3 products · 10–11
- Notched Charpy impact
- 15kJ/m²
- one product
- Not applicable:
- HDT at 0.45 MPa.
- Not published:
- price.
OBC is an olefin block copolymer, a polyolefin whose glass transition is -13 °C. Makers sell it for low warpage, chemical resistance, and impact and wear resistance. On the H2C the sheets that state a chamber say none is needed, and its sheets give a bed window of 90–105 °C.
Thinly documented Three products, with values from three makers' documents: Dow's, Fillamentum's and Kexcelled's. Read each figure as a few sheets' word.
On the H2C
Printing in full- Nozzle
- 195–200 °C
- most products that give one
- Bed
- 90–105 °C
- most products that give one
- Heated chamber
- none needed
- 2 of 3 products
- Drying
- 80 °C for 2 h
- most advise it only for wet filament
- Nozzle type
- not stated
No product's setting is beyond the H2C's limits: nozzle 350 °C, bed 120 °C, heated chamber 65 °C.
Among the materials
Against PLA, OBC is 73 % weaker flat and 64 % weaker across the layers. Against POM / Acetal, OBC is 79 % weaker flat. Among the materials, OBC has a high elongation at break (XY) and notched Charpy impact, and a low tensile modulus (XY), tensile strength (XY), tensile strength (Z) and density: each is in the top or bottom quarter of the materials that publish it.
Against its alternatives, OBC has the lowest tensile modulus and tensile strength
How does it compare with what an engineer would buy instead?
- OBC: its products' median and middle half
- an alternative
- lowest to highest
- each material's median (top row)
- set apart: test bar not described as printed, or no stated load
- beyond the scale
Each row is a material, each column a property: the bar is the middle half of a material's products, the tick their median, the hairline their lowest to highest; the ticks above the rows are every material's median.
The figure as a table
| Material | Modulus (XY) (GPa) | Strength (XY) (MPa) | Strength (Z) (MPa) | Notched Charpy (kJ/m²) | HDT 0.45 MPa (°C) | Price (CAD/kg) |
|---|---|---|---|---|---|---|
| OBC (this material) | 0.2 · 1 | 12 · 2 | 11 · 3 | 15 · 1 | — | — |
| PLA | 2.58 (2–2.88) · 61 | 45 (39.5–53) · 83 | 30.3 (22.1–34) · 40 | 6 (3.97–7.9) · 14 | 56 (53–58) · 50 | 33 (28–40) · 27 |
| PVDF | 2.45 · 1 | 51 · 1 | — | — | 158 · 1 | 356 · 1 |
| POM | 1.87 · 1 | 57.5 · 2 | — | — | 100 as published (1) | 121 · 1 |
| PCL | 0.35 as published (2) | 45 · 1 | — | — | 57 · 1 | 234 · 1 |
| PA12 | 1.4–1.5 as published (6) | 45–60 as published (6) | — | 7–14 as published (4) | 100–135 as published (4) | 183 · 2 |
OBC publishes no HDT at 0.45 MPa or price.
Mechanical properties
Printed flat (XY), OBC typically reaches a tensile strength of 12 MPa at a modulus of 200 MPa, and breaks at 455 % elongation. In bending, its flexural strength is typically 7.8 MPa at a flexural modulus of 244 MPa.
| As each sheet publishes it | Dow EVOLV3D OBC | Fillamentum OBC 905 | Kexcelled THE K8 OBC |
|---|---|---|---|
| Tensile strength (XY) | 14 MPanot described as printed | 14 MPa | 10 MPa |
| Tensile modulus (XY) | not published | not published | 0.2 GPa |
| Tensile strength (Z) | 11 MPa | 11 MPa | 10 MPa |
| Elongation at break (XY) | > 700 %not described as printed | 700 % | 210 % |
| Notched Charpy impact | not published | not published | 15 kJ/m² |
| Shore D hardness | 53 Shore D | 53 Shore D | not published |
In grey, a value a product reads from a data sheet it shares, where its own sheet is silent.
Across the layers (Z), OBC keeps 89 % of its flat strength and 100 % of its flat stiffness
What does a printed part lose across the layers (Z) against flat (XY), and is that usual?
- a product
- equal share: 100, 75, 50 and 25 %
- OBC's median share
- an alternative
Tensile strength
Z keeps 89 % of XY, median of 2 products
flat (XY), MPa
Share kept: OBC 89 % · PLA 60 %
Tensile modulus
Z keeps 100 % of XY, median of 1 product
flat (XY), GPa
Share kept: OBC 100 % · PLA 89 %
Elongation at break
Z keeps 46 % of XY, median of 2 products
flat (XY), %, log scale on both axes
Share kept: PLA 59 % · OBC 46 %
Each point is a product that publishes both from one sheet: below the 100 % ray it keeps less across the layers than flat. Under each plot, the median share its alternatives' products keep.
The figure as a table
| Product | Property | Flat (XY) | Across (Z) | Z as a share of XY |
|---|---|---|---|---|
| Fillamentum OBC 905 | Tensile strength | 14 MPa | 11 MPa | 79 % |
| Kexcelled THE K8 OBC | Tensile strength | 10 MPa | 10 MPa | 100 % |
| Kexcelled THE K8 OBC | Tensile modulus | 0.2 GPa | 0.2 GPa | 100 % |
| Fillamentum OBC 905 | Elongation at break | 700 % | 480 % | 69 % |
| Kexcelled THE K8 OBC | Elongation at break | 210 % | 50 % | 24 % |
| PLA (alternative) | Tensile strength | 60 % · 39 | ||
| PLA (alternative) | Tensile modulus | 89 % · 29 | ||
| PLA (alternative) | Elongation at break | 59 % · 35 |
Tensile strength: one more product is in the median across the layers but gives no share, with no flat value of the same test from the same sheet: Dow EVOLV3D OBC (no flat value compared). Elongation at break: one more product is in the median across the layers but gives no share, with no flat value of the same test from the same sheet: Dow EVOLV3D OBC (no flat value compared).
Flat and across the layers, property by property
Flat and across the layers
| Property | Printed flat (XY) | Across the layers (Z) | Z as a share of XY | ||
|---|---|---|---|---|---|
| Median | Products | Median | Products | ||
| Tensile strength MPa | 12 | 2 | 11 | 3 | 89 %2 products |
| Tensile modulus GPa | 0.2 | 1 | 0.2 | 1 | 100 %1 product |
| Elongation at break % | 455 | 2 | 480 | 3 | 46 %2 products |
| Flexural strength MPa | 7.8 | 3 | 6.8 | 3 | 87 %3 products |
| Flexural modulus GPa | 0.244 | 3 | 0.217 | 3 | 89 %3 products |
The middle half of the products under each median. The share is each product's Z value as a part of its XY value, from one sheet and one state, and the median of those shares. Where it counts fewer products than the Z median, the others publish no flat value of the same test from the same sheet; the figure's table names them. How XY and Z differ.
Thermal properties
Its glass transition is -13 °C. As published, Vicat softening is 98 °C, from one product and melting typically 130 °C.
| As each sheet publishes it | Dow EVOLV3D OBC | Fillamentum OBC 905 | Kexcelled THE K8 OBC |
|---|---|---|---|
| Glass transition (Tg) | -13 °C | -13 °C | not published |
In grey, a value a product reads from a data sheet it shares, where its own sheet is silent.
Not published for OBC: HDT at 0.45 MPa and HDT at 1.8 MPa.
Printing on the H2C
OBC softens near -13 °C, below the H2C's 65 °C chamber
What does printing it on the H2C take, and how hot can a part get?
- share of the products that accept each temperature
- what most products accept
- the H2C's limit, and beyond it
- a product
- OBC: its products' median and middle half
- as published, under each sheet's own test
Printing it on the H2C
In service
°C
One temperature axis for the settings a print needs and the temperatures a part meets. A setting's shade is how many of the products whose sheets give a window accept each degree; the H2C's limit closes its row.
The figure as a table
| Setting or property | Most products, or the median | Products | H2C limit |
|---|---|---|---|
| Nozzle | 195–200 °C | 3 | 350 °C |
| Bed | 90–105 °C | 3 | 120 °C |
| Heated chamber | — | 0 | 65 °C |
| Drying | 80 °C, 2 h | 2 | — |
| Glass transition (Tg) | -13 °C | 2 | — |
| Vicat softening temperature | 98 °C | 1 | — |
| Melting temperature | 130 °C | 2 | — |
No OBC product gives a heated chamber window. Windows read from the Bambu Lab Filament Guide are not shaded: the guide speaks for every product that reads it.
| Setting | Dow EVOLV3D OBC | Fillamentum OBC 905 | Kexcelled THE K8 OBC |
|---|---|---|---|
| Nozzle | 160–200 °C | 195–215 °C | 210–250 °C |
| Bed | 60–100 °C | 90–105 °C | 90–110 °C |
| Heated chamber | none needed | none needed | not stated; within, by its kind |
| Drying | optional: 80 °C for ≥ 2 h | optional: 80 °C for ≥ 2 h | not published |
| Nozzle type | not stated | not stated | not stated |
In grey, a setting a product reads from a data sheet it shares or from the Bambu Lab Filament Guide, where its own sheet is silent, or a chamber all of them leave silent, read from what the makers of its kind of plastic state.
What makers say about printing it
From makers: warping and shrinkage and odour and emissions
Warping and shrinkage
Low warpage – faster startup and less fine tuning
Dow EVOLV3D OBC, data sheet, p. 1This material demonstrates significantly improved warpage and printability for a polyolefin, enabling lightweight, durable parts with excellent chemical resistance.
Dow EVOLV3D OBC, data sheet, p. 1
Odour and emissions
Recommended to be printed in ventilated area
Dow EVOLV3D OBC, data sheet, p. 1
Products
Three products from three makers: Dow, Fillamentum and Kexcelled.
Uses, limitations and chemicals
What it is sold for
This material can be used to produce electrical and electronic equipment.
Fillamentum OBC 905, data sheet, p. 1Chemical resistant – Resistant to common solvents enabling new applications
Dow EVOLV3D OBC, data sheet, p. 1Impact and wear resistance
Fillamentum OBC 905, data sheet, p. 1
Chemicals and environment
| Exposure | What makers say |
|---|---|
| Organic solvent resistance | Described in words, with no rating, in all 8 statements |
| Oil and grease resistance | Described in words, with no rating, in its one statement |
| Acid resistance | Described in words, with no rating, in all 4 statements |
| UV and outdoor | Described in words, with no rating, in its one statement |
Makers rarely give the concentration, temperature or duration: treat them as indications, not design data. Each product's statements are on its card.
Resin reference data (for plain OBC, where no maker of these products speaks): it resists sodium hydroxide, 50 % (aqueous bases). Fillers, pigments and printing change this, so it does not stand for these products.
Density and price
Its three products give a density of 900–905 kg/m³. No OBC product has a price in the sample.
| As each sheet publishes it | Dow EVOLV3D OBC | Fillamentum OBC 905 | Kexcelled THE K8 OBC |
|---|---|---|---|
| Density | 905 kg/m³ | 905 kg/m³ | 900 kg/m³ |
Other properties, as published
2 more properties are published, each under its own sheet's test conditions, so they are listed, not ranked.
The 2 properties, lowest to highest
| Property | Products | Lowest–highest |
|---|---|---|
| Elongation at yield | 2 | 10–24 % |
| Melt mass-flow rate | 2 | 2–9.5 g/10 min |
Sources
6 documents from 4 publishers (4 data sheets, 1 printer document and 1 maker's product page or guide), read 10 Sep–19 Oct 2026. Each value on OBC's Products page names its document and page, and links to the original.
Bambu Lab, H2C Filamant Printing Guide (the H2C's printer guide): print settings for 3 products.
Every document (6), by publisher
| Publisher | Documents | Values | Products |
|---|---|---|---|
| Fillamentum | 3 | 21 | 1 |
| Kexcelled | 1 | 21 | 1 |
| Dow | 1 | 7 | 2 |