| Category | PLA Filament | HIPS Filament |
|---|---|---|
| Polymer Family | Polylactic acid (biobased polyester) | High-impact polystyrene (PS with rubber modifiers) |
| Typical Nozzle Temperature | 215°C first layer / 210°C other layers | 225–260°C (common profiles) |
| Typical Bed Temperature | 60°C | 100–120°C (common profiles) |
| Glass Transition (Tg) | 59.1°C | 99°C |
| Heat Deflection (HDT) | 58.8°C @ 0.455 MPa | 91°C @ 0.45 MPa |
| Density / Specific Gravity | 1.24 g/cm³ (specific gravity) | 1.023 g/cm³ (printed-part density) |
| Tensile Modulus | 3071–3292 MPa (print-orientation range) | 1588–1603 MPa (print-orientation range) |
| Tensile Strength | 33.1–56.0 MPa (tensile stress at break) | 13.7–18.4 MPa (tensile strength) |
| Impact (Notched) | 3.9 kJ/m² (Charpy, 23°C) | 4.1–6.6 kJ/m² (Charpy, notched) |
| Support Removal Style | Breakaway supports are common | Dissolvable supports are common (d-limonene) |
| Surface Look | Clean detail with a wide finish range | Matte-leaning look and easy sanding feel |
Numbers in the table are published examples, not a promise for every spool. Colorants, brand blends, and print orientation can shift results.
- Data Notes and One-Time Sources
- PLA Filament and HIPS Filament Material Identity
- Thermal Behavior and Heat Performance
- Mechanical Feel in Printed Parts
- Print Window and Process Personality
- Supports and Dissolution Chemistry
- Surface Finish and Post-Processing Behavior
- PLA Surface Character
- HIPS Surface Character
- Environmental and Labeling Notes
- Specs You’ll See on Spools and Datasheets
- Where Each Filament Naturally Fits
- PLA Common Matches
- HIPS Common Matches
If you’re comparing HIPS vs PLA, you’re really comparing two very different personalities in FFF/FDM 3D printing: PLA filament is tuned for easy, crisp printing, while HIPS filament is built around tougher, higher-temperature behavior and the unique perk of soluble support potential.
Data Notes and One-Time Sources
- PLA print temperatures shown above (215°C first layer / 210°C other layers, 60°C bed) come from Prusa’s material guide.✅Source
- HIPS print temperatures shown above (nozzle and bed ranges) are aligned with commonly published manufacturer profiles; Prusa’s guide also notes limonene-solubility for HIPS supports.✅Source
- PLA mechanical + thermal example values (Tg 59.1°C, HDT 58.8°C @ 0.455 MPa, specific gravity 1.24 g/cm³, modulus/strength ranges) are from the Ultimaker PLA technical data sheet (3D-printed specimens).✅Source
- HIPS mechanical + thermal example values (Tg 99°C, HDT 91°C @ 0.45 MPa, printed density 1023 kg/m³, modulus/strength/impact values, and processing window 240–260°C nozzle and 100–120°C bed) are from the Ultrafuse HiPS technical data sheet.✅Source
PLA Filament and HIPS Filament Material Identity
- PLA Filament
- Polylactic acid, commonly presented as a plant-derived polyester. In 3D printing it’s known for sharp detail, predictable flow, and a wide brand ecosystem. For a deeper overview of how different PLA formulations behave in printing—including PLA+, HT-PLA, and other modified variants—see the Ultimate PLA Filament Guide.
- HIPS Filament
- High-impact polystyrene, a rubber-modified polystyrene. In 3D printing it’s known for dimensional stability, support roles, and post-processing friendliness.
- Why Identity Matters
- Polymer backbone shapes heat behavior, stiffness, and support strategy. That’s why HIPS vs PLA can feel like two different workflows even on the same printer.
- What “Filament Grade” Implies
- Filament grade often includes additives for flow, color, and stability. So datasheet numbers are best treated as reference points, not a universal law.
Thermal Behavior and Heat Performance
Glass transition (Tg) is the point where a plastic shifts into a softer, more rubbery feel. In the example datasheets, PLA sits around 59.1°C, while HIPS sits around 99°C. That gap is the core reason many people describe HIPS filament as feeling more “confident” in warmer environments, while PLA filament stays a favorite for cooler-use parts.
Heat deflection temperature (HDT) adds more context because it includes a load. In the example sheets, PLA is listed at 58.8°C (0.455 MPa), while HIPS is listed at 91°C (0.45 MPa). Those test conditions help explain why part geometry and load direction can matter as much as the material name.
Mechanical Feel in Printed Parts
PLA filament is often described as stiffer in hand: higher tensile modulus typically translates to a more “rigid” feel. HIPS filament tends to read as more forgiving under flex, which pairs nicely with its reputation for impact-friendly behavior in many everyday shapes.
Print orientation matters for both. The example PLA datasheet shows a noticeable spread across XY/YZ/Z directions, and the example HIPS datasheet shows the same pattern. Layer-by-layer structure is the shared reality of FFF, so the same filament can feel different depending on how the part is oriented during printing.
Relative Profile (visual guide, not a lab test)
PLA bars are shown with the fill-pla color, and HIPS bars use the fill-hips color. This panel is a reading aid for typical tendencies, not a substitute for the datasheet values.
Print Window and Process Personality
PLA filament usually sits in a lower-temperature window, and that’s a big reason it’s widely used across many printer types. HIPS filament tends to operate at higher nozzle and bed temperatures, which often pairs well with printers that are already comfortable running warmer materials.
- Flow and detail: PLA often highlights fine edges and clean corners in decorative and display-style geometry.
- Warm printing behavior: HIPS often rewards consistent heat and stable first-layer bonding, especially in larger shapes.
- Dimensional expectations: both materials can be tuned for accurate parts, and the biggest gains usually come from repeatable profiles and consistent filament dryness.
Supports and Dissolution Chemistry
This is where HIPS filament gets a unique spotlight. In dual-material printing, HIPS is widely used as a support filament because it can be removed by dissolution using d-limonene in setups designed around that workflow. PLA more commonly pairs with breakaway supports, focusing on easy removal and fast iteration.
Support compatibility is not only about “does it dissolve.” Temperature alignment, bed adhesion, and interface bonding shape how cleanly supports separate. That’s why HIPS vs PLA support choices are often printer-and-profile specific.
Surface Finish and Post-Processing Behavior
PLA Surface Character
PLA filament is known for clean layer definition. Depending on brand and temperature, you’ll see anything from silky to matte. For finishing, sanding and primer + paint workflows are common, especially on display models.
HIPS Surface Character
HIPS filament often prints with a matte-leaning look and is widely described as pleasant to sand. It’s commonly used for parts that will be painted, glued, or finished, and it can play nicely in projects where the support-removal strategy matters.
Environmental and Labeling Notes
You’ll often see PLA filament described with compostable language, but in practice that label depends on certification and facility conditions. A widely referenced standard for labeling plastics designed to be aerobically composted in municipal or industrial facilities is ASTM D6400.✅Source
HIPS filament is part of the styrenic plastics family, and like many thermoplastics, its end-of-life route is strongly shaped by local collection and material streams. For both HIPS and PLA, the most practical eco-win is often printing only what you need and designing parts that stay in use for a long time.
Specs You’ll See on Spools and Datasheets
- Diameter and ovality: 1.75 mm or 2.85 mm ecosystems, plus tolerance claims that influence extrusion consistency.
- Moisture sensitivity notes: many brands describe storage guidance because dry filament supports consistent flow.
- Mechanical test context: look for whether numbers are from injection-molded samples or 3D-printed samples, and whether values are given by print direction.
- Thermal trio: Tg, HDT, and Vicat describe different kinds of heat behavior; they’re related, but they are not interchangeable.
Where Each Filament Naturally Fits
PLA Common Matches
- Display models with fine detail and clean edges
- Educational prints where predictability is the goal
- Rapid prototypes that value speed and repeatability
- Large geometry where low warping tendency is appreciated
HIPS Common Matches
- Soluble supports where clean removal is valuable
- Paint-ready parts that benefit from sanding-friendly behavior
- Warm-environment parts where higher Tg matters
- Dimensional stability builds where predictable geometry is prioritized
