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eSUN PLA-LW White Filament 1 kg with Plastic Roll eSUN PLA-LW White is a white lightweight foaming ...
eSUN PLA-LW Filament for Lightweight 3D Printing
eSUN PLA-LW is a lightweight foaming PLA filament for FDM/FFF 3D printing, designed for models where low weight, adjustable density, matte surface and large-volume printing are important. The material is especially popular for aeromodelling, RC airplanes, drones, ship models, cosplay props, decorative objects, lightweight prototypes, large models and applications where regular PLA would make the part too heavy.
Unlike standard PLA, PLA-LW uses active foaming technology. As the temperature rises, the filament expands during printing, allowing the user to reduce extrusion flow and create lighter parts. This means that one spool of PLA-LW can be more efficient than regular PLA when printing models of the same volume, while the final model has lower density and reduced load on wings, shells or structures.
eSUN PLA-LW is not just “light PLA”. It is a functional material that requires understanding of foaming behavior, temperature, speed, line width, wall thickness and extrusion multiplier. When properly tuned, PLA-LW can produce lightweight, matte and sufficiently rigid models with good layer adhesion. When poorly tuned, it may cause stringing, unstable geometry, yellowing at high temperature, weak walls or excessive foaming.
What Is eSUN PLA-LW
PLA-LW means Lightweight PLA. It is a PLA-based material that foams during printing. When heated inside the nozzle, the material expands, increases volume and allows parts to be printed with reduced density. In practice, this means that with the correct temperature and reduced flow, a printed model can weigh much less than the same model printed with regular PLA.
The main feature of PLA-LW is adjustable foaming. The higher the temperature and the longer the material stays inside the melt zone, the more actively it foams. This changes density, weight, stiffness, surface appearance and mechanical behavior of the printed model. That is why PLA-LW is especially useful for experienced users who want to control not only model shape, but also part weight.
The material was developed primarily for model aircraft. For airplanes, gliders, wings and fuselages, weight reduction directly affects flight performance: wing loading is reduced, stall speed decreases, handling improves and model efficiency increases. However, PLA-LW is not limited to aviation. It can also be used for lightweight ship models, prototypes, cosplay parts, large decorative objects and shells where weight saving is important.
Main Advantages of eSUN PLA-LW
- Low-density printed parts: with the correct foaming mode, density can be much lower than regular PLA.
- Foaming volume ratio up to 220 %: the material expands during printing, allowing lower flow and lighter models.
- Adjustable strength and density: foaming can be controlled by temperature, speed and extrusion rate.
- Good layer adhesion: suitable for thin-wall parts, fuselages, wings, shells and large lightweight structures.
- Delicate matte surface: foaming helps reduce visible layer lines and gives a less plastic-like finish.
- Easy to paint: the PLA-LW surface is suitable for painting, priming and decorative post-processing.
- Good for large models: the material helps reduce the weight of large parts without requiring an enclosed chamber.
- No enclosure required: as a PLA-based material, PLA-LW usually prints without a heated chamber.
- Compatible with FDM/FFF printers: the material is available in 1.75 mm diameter and works with many desktop 3D printers.
eSUN PLA-LW Colors
The official eSUN PLA-LW range is available in the basic colors Black and White. These are practical colors for technical, model and decorative applications. Black is often used for prototypes, housings, internal parts, technical models and parts that do not require painting. White is especially useful for aircraft models, decorative models, cosplay props and parts that will be painted after printing.
| Official Color | Description | Visual Effect | Best Applications |
|---|---|---|---|
| Black | Black | Technical matte appearance, hides small marks and use traces well | Housings, internal parts, RC models, technical prototypes, machine models, black decorative parts |
| White | White | Light matte surface, convenient for painting, marking and visual inspection | Aircraft models, wings, fuselages, cosplay props, decorative elements, paint-ready models |
With PLA-LW, the final color can depend on printing temperature. During high-temperature foaming, white and light parts may become slightly yellow. This is normal for active foaming mode. To reduce yellowing, lower the temperature, reduce time in the hotend or adjust the balance between temperature, speed and flow.
Applications of eSUN PLA-LW
PLA-LW is a specialized functional material. It is not selected when the goal is maximum strength; it is selected when reducing model weight is important. This is especially useful for models that must fly, float, be carried by hand, attach to lightweight structures or have a large volume with minimal mass.
Model Aircraft and RC Airplanes
The primary application of PLA-LW is aeromodelling. The material is suitable for wings, fuselages, tail parts, fairings, air intakes, decorative panels, internal ribs and other parts of RC airplanes. Lower weight reduces wing loading and can improve flight performance.
Drones and Lightweight Shells
PLA-LW can be used for lightweight covers, protective shells, decorative housings, fairings and non-load-bearing drone parts. For structural frames and high-impact parts, stronger engineering materials are better, but for lightweight shells PLA-LW can be very useful.
Ship Models
The material is suitable for lightweight hulls, deck elements, superstructures, decorative parts and ship model prototypes. Low weight helps create large models without excessive mass, while the matte surface makes painting easier.
Cosplay and Props
PLA-LW is useful for large cosplay parts: helmets, armor, decorative panels, fantasy weapons, masks, costume elements and stage props. Large parts printed from regular PLA can be heavy, while PLA-LW helps reduce weight and makes wearable items more comfortable.
Large Decorative Models
The material can be used for large vases, art objects, sculptures, exhibition models, display elements, mockups and interior decor. It is especially useful for vase mode or thin-wall prints where shape is more important than maximum mechanical strength.
Architectural and Educational Models
PLA-LW is suitable for large building models, bridges, landscape models, educational samples and presentation models. It helps create large parts with less weight, which is useful for transport, exhibitions and presentations.
Weight-Controlled Prototypes
When a prototype needs to check size, aerodynamics, shape or ergonomics, PLA-LW allows a lightweight model to be printed without unnecessary mass. This is useful for housings, covers, vehicle models, design elements and test shells.
Technical Specifications of eSUN PLA-LW
PLA-LW has special properties that differ from standard PLA. It is important to understand that some values depend on the foaming level. The same material can behave differently at different temperatures, speeds, flows and nozzle sizes.
| Parameter | Value | Comment |
|---|---|---|
| Material type | Lightweight PLA / PLA-LW | Lightweight foaming PLA-based filament |
| Diameter | 1.75 mm | Compatible with many modern FDM/FFF 3D printers |
| Spool weight | 1 kg | Standard spool for regular printing |
| Official colors | Black, White | Basic black and white color options |
| Raw material density | 1.2 g/cm³ | Density before foaming according to technical data |
| Minimum printed part density | down to 0.54 g/cm³ | Depends on temperature, speed, nozzle and flow |
| Foaming volume ratio | up to 220 % | Allows reduced flow and lower model weight |
| Melt Flow Index | 8.1 g/10 min at 190 °C / 2.16 kg | Indicates melt behavior |
| Heat Distortion Temperature | 42 °C at 0.45 MPa | Not recommended for hot zones or constant heat load |
| Tensile Strength X-Y | 11.39 MPa | Depends on foaming level and model orientation |
| Tensile Strength Z | 1.74 MPa | Layer bonding depends on temperature, flow and wall thickness |
| Elongation at Break X-Y | 4.02 % | The material is not flexible |
| Elongation at Break Z | 1.52 % | Part orientation is important for Z-direction loads |
| Flexural Strength X-Y | 20.4 MPa | Suitable for lightweight shells and decorative structures |
| Flexural Strength Z | 3 MPa | Depends on layer bonding and foaming mode |
| Flexural Modulus X-Y | 964.07 MPa | Lower stiffness than dense PLA, but suitable for lightweight models |
| Flexural Modulus Z | 206.83 MPa | Layer direction should be considered during design |
| IZOD Impact Strength X-Y | 5.49 kJ/m² | For lightweight models and shells |
| IZOD Impact Strength Z | 0.73 kJ/m² | Not intended for strong impact loads across layers |
⚙️ Recommended Printing Parameters
PLA-LW requires more deliberate tuning than regular PLA. The main goal is to balance temperature, flow and speed to achieve the desired weight and strength. At lower temperature, the material behaves more like regular PLA and foams less. At higher temperature, it foams actively, increases volume, reduces density, but may also cause more stringing and yellowing on light parts.
| Parameter | Recommendation | Comment |
|---|---|---|
| Nozzle temperature | 190–270 °C | Lower temperatures mean less foaming; higher temperatures mean stronger foaming and lower density |
| Active foaming range | about 210–270 °C | Must be tested for the specific printer, nozzle and model |
| Bed temperature | 45–60 °C | Helps first-layer adhesion |
| Print speed | 40–100 mm/s | Speed affects foaming level and wall consistency |
| Cooling | 100 % | Helps stabilize shape, especially on thin walls |
| Retraction | Usually disabled or strongly reduced | Because the material keeps foaming inside the nozzle, retraction is often ineffective |
| Printing multiple models | Not recommended | Travel moves between models increase stringing and reduce surface quality |
| Print mode | Vase mode / spiral mode for aircraft and shells | Helps reduce travel moves and stringing |
| Nozzle | 0.4 mm or larger | 0.4–0.6 mm is often convenient for stable lightweight walls |
| Extrusion flow | calibrated by test, can be much lower than 100 % | With strong foaming, flow may be reduced significantly, for example to 45 % in some modes |
| Enclosure | Not required | The material usually prints without an enclosed chamber |
How PLA-LW Foaming Works
PLA-LW foams inside the nozzle melt zone. When heated, the material expands and a larger volume of plastic exits the nozzle compared with normal extrusion. Therefore, at high temperatures PLA-LW should not be printed with the same flow as regular PLA: the model will be over-extruded, heavy, swollen and dimensionally inaccurate.
To tune the material correctly, the user needs to find the temperature and speed at which a specific printer gives the desired foaming level. Usually this is done by printing single-wall tests, cubes or calibration samples, then measuring wall thickness and weight. After that, flow rate, extrusion multiplier, line width, temperature and speed are adjusted.
Low Temperature
At lower temperature, PLA-LW foams less. The part becomes denser, heavier and closer to regular PLA. This mode can be useful when strength is more important than minimum weight.
Medium Temperature
A medium mode provides a balance between weight, strength and surface quality. It is suitable for many models where weight reduction is needed but the walls must remain stable.
High Temperature
At high temperature, the material foams more actively, density decreases and extrusion volume increases. This mode is used for maximum weight reduction, but it requires reduced flow, careful hotend control and color monitoring. Light parts may yellow.
Flow and Model Weight Calibration
The main difference between PLA-LW and regular PLA is that flow must be tuned not only for dimensional accuracy, but also for model weight. If the standard 100 % flow is used during active foaming, too much material will leave the nozzle. Therefore, flow must be reduced until the actual wall width matches the intended slicer line width.
- Print a single-wall test first: this helps determine the actual line width after foaming.
- Measure wall thickness with calipers: compare the real value with the slicer line width.
- Adjust flow rate: reduce flow until the wall matches the target width.
- Weigh the model: for aircraft and drones, weight is as important as geometry.
- Save profiles: keep separate profiles for each temperature and speed combination.
- Change one parameter at a time: otherwise it is difficult to understand what caused the result.
Recommendations for Model Aircraft
When printing model aircraft with PLA-LW, the design should be prepared for thin walls, stable layer adhesion and minimum weight. The material works well for wings, fuselages and shell structures where large volume and low mass are needed.
- Use models specifically designed for LW-PLA or PLA-LW.
- Print test wing sections before printing the full model.
- Control the weight of every part after printing.
- Use single-wall or spiral/vase mode if the model is designed for it.
- Pay attention to layer direction in loaded areas.
- Do not increase temperature unnecessarily to avoid yellowing and excessive foaming.
- Test glue on small samples before final assembly.
- Check the center of gravity after assembly.
PLA-LW, PLA-Lite, TPU-LW and PEBA-LW: Key Differences
eSUN offers several materials related to low weight or lightweight printing. They should not be confused: PLA-LW, PLA-Lite, TPU-LW and PEBA-LW are intended for different applications.
| Material | Type | Main Purpose | Flexibility | Best Applications |
|---|---|---|---|---|
| PLA-LW | Foaming lightweight PLA | Maximum weight reduction through active foaming | Rigid | Model aircraft, RC planes, lightweight shells, cosplay, large mockups |
| PLA-Lite | Easy-printing lightweight/basic PLA | Simple and affordable printing with good mechanical behavior | Rigid | Everyday models, prototypes, education, decorative objects |
| TPU-LW | Lightweight foaming TPU | Flexible lightweight parts with matte surface | Flexible | Shock-absorbing parts, soft components, sports and protective products |
| PEBA-LW | Lightweight elastic PEBA | Light elastic parts with good recovery | Elastic | Sports parts, wearable parts, footwear components, cushioning |
If a rigid and very lightweight shell is needed, choose PLA-LW. For simple everyday printing, choose PLA-Lite. For flexible parts, choose TPU-LW. For elastic, lightweight and dynamic parts, choose PEBA-LW.
PLA-LW Compared with Regular PLA
| Criterion | eSUN PLA-LW | Regular PLA |
|---|---|---|
| Part weight | Much lower with active foaming | Standard PLA weight |
| Print tuning | More complex; temperature and flow must be tuned | Easier; usually works with standard PLA profiles |
| Surface | Matte, foamed, less visible layers | Usually smooth or slightly glossy |
| Strength | Depends on foaming level; lower at high foaming | More predictable with standard settings |
| Best application | Model aircraft, lightweight shells, large models | Everyday models, prototypes, decor, education |
| Retraction | Often disabled or strongly reduced | Usually tuned normally |
| Multiple models per plate | Not recommended because of stringing and foaming | Usually possible |
Limitations of PLA-LW
PLA-LW is not a universal replacement for all plastics. It is a specialized material for weight reduction. It should be used where low mass is more important than high impact strength, high service temperature or simple setup.
- Not for hot zones: heat distortion temperature is lower than engineering plastics.
- Not for high-impact structural parts: the foamed structure is lighter but not designed for extreme loads.
- Not beginner-proof without testing: the material requires flow, temperature and speed calibration.
- Not ideal for printing multiple parts at once: travel moves increase stringing.
- Not for long printing above 250 °C on PTFE/Teflon hotends: printer maximum temperature limits must be considered.
- Not for unprotected outdoor use: as a PLA-based material, it is not designed for constant sun, moisture and heat exposure.
- Not for food-contact parts: FDM parts have layers and micro-pores, and this material is intended for technical and decorative models.
3D Printer Compatibility
eSUN PLA-LW in 1.75 mm diameter is compatible with many FDM/FFF 3D printers if the printer supports the required nozzle temperature and stable filament feeding. For printing above 250 °C, hotend design is important. Printers with PTFE/Teflon tubes in the hot zone may not be suitable for long operation at such temperatures, so an all-metal hotend is preferred for high-temperature foaming.
- Creality: suitable for Ender, CR, K1 and other models when temperature and hotend limits are respected.
- Anycubic: suitable for Kobra-series FDM printers and other models that support the required temperatures.
- Bambu Lab: can be used with a suitable PLA-LW profile and flow correction.
- Prusa: suitable with proper temperature, flow and print mode tuning.
- QIDI, Flashforge, Sovol, Artillery, Elegoo: compatibility depends on hotend, extruder and material profile.
- Direct Drive: provides stable feeding and is convenient for fine tuning.
- Bowden: possible, but requires careful retraction and temperature settings.
Storage and Drying Recommendations
PLA-LW, like other PLA-based materials, should be stored dry. Moisture reduces print quality, increases stringing and can cause bubbles, hissing, rough surface and unstable foaming. For model aircraft and thin-wall parts this is especially important because even small extrusion instability can damage a wing or fuselage wall.
- Store the spool in a sealed bag or dry container.
- Use silica gel or another desiccant.
- Do not leave PLA-LW open for several days in a humid room.
- Dry the filament before important prints.
- Return the spool to a bag or dry box after printing.
- Do not overheat the spool during drying to avoid filament or spool deformation.
Post-Processing PLA-LW
PLA-LW is easy to paint. Its matte foamed surface helps paint visually adhere well to the model. This is why the material is often used for aircraft, cosplay props, mockups and decorative objects that are later sanded, primed and painted.
Sanding
Light sanding helps remove small imperfections and seam marks. Avoid overheating the surface because PLA-based material can soften from excessive friction.
Priming
For painted models, use a compatible primer. It helps smooth the surface, seal small pores and prepare the part for the final color.
Painting
White PLA-LW is especially convenient for painting because it provides a light base. Black PLA-LW can be used as a final technical color or as a base for dark models.
Gluing
PLA-LW parts can be glued with adhesives suitable for PLA. For aircraft models, it is better to test glue on small samples before final assembly because foamed structure can behave differently from dense PLA.
Common PLA-LW Printing Problems and Solutions
| Problem | Possible Cause | Solution |
|---|---|---|
| Model is too heavy | Insufficient foaming or flow too high | Increase temperature, reduce flow rate, print a wall test and weigh the sample |
| Model is too weak | Excessive foaming, density too low, walls too thin | Lower temperature, increase flow, add ribs or change wall thickness |
| Too much stringing | Foaming inside nozzle, high temperature, multiple models on the plate | Print one part, use vase mode, reduce temperature and reduce travel moves |
| White part yellowing | High-temperature foaming | Lower temperature and find a better balance between weight and color |
| Uneven wall | Unstable foaming, wet filament, sudden speed changes | Dry the material, stabilize speed and calibrate flow |
| Poor first-layer adhesion | Wrong Z-offset, cold bed, first layer too fast | Tune Z-offset, use 45–60 °C bed temperature and stabilize the first layer |
| Over-extrusion | Flow not reduced during active foaming | Lower extrusion multiplier / flow rate and repeat the wall test |
| Clogging or unstable feeding | Overheating, dirty nozzle, unsuitable hotend | Check nozzle, temperature, PTFE limits and extruder condition |
Who Should Choose eSUN PLA-LW
eSUN PLA-LW is recommended for users who print not only visually good models, but parts where weight matters. It is a material for users who are ready to test settings and want a real advantage from mass reduction.
- Aircraft model builders: for wings, fuselages, tail parts and lightweight shells.
- RC model makers: for airplanes, ships, decorative housings and non-load-bearing parts.
- Cosplay makers: for large costume parts, helmets, armor and props.
- Designers: for lightweight mockups, large prototypes and exhibition objects.
- 3D printing services: to expand the range of functional materials.
- Experienced FDM users: for experiments with density, weight and foaming behavior.
File Download: technical files and certificates
Official technical and support files are available for eSUN PLA-LW. These are useful for professional use, material profile setup and product page preparation.
- PLA-LW HS Parameters for Bambu Lab & Creality
- MSDS / SDS
- TDS
- RoHS
- REACH
FAQ About eSUN PLA-LW
Is eSUN PLA-LW regular PLA?
No. PLA-LW is based on PLA, but it uses active foaming. It is designed for lightweight, low-density printed parts.
What is PLA-LW best used for?
PLA-LW is best for model aircraft, RC airplanes, lightweight shells, cosplay props, ship models, large mockups and decorative models where low weight is important.
What colors are available for eSUN PLA-LW?
The official eSUN PLA-LW colors are Black and White. Black is convenient for technical models, while White is useful for aircraft models and paint-ready parts.
Why is PLA-LW lighter than regular PLA?
When heated, the material foams and expands. The user reduces extrusion flow, so the model becomes less dense and lighter.
Why does PLA-LW create stringing?
Stringing occurs because the material continues foaming in the nozzle. Retraction is often ineffective, so it is recommended to print one part, reduce travel moves and use vase mode when suitable.
Can PLA-LW be printed on a regular 3D printer?
Yes, if the printer supports 1.75 mm filament and the required nozzle temperature. For printing above 250 °C, hotend limitations must be considered, especially if the hot zone contains a PTFE/Teflon tube.
Does PLA-LW need an enclosed chamber?
Usually no. PLA-LW prints as a PLA-based material and does not require an enclosed chamber, but it does require precise temperature, flow and speed tuning.
Can PLA-LW be painted?
Yes. PLA-LW is easy to paint, and its matte surface is suitable for priming, painting and decorative post-processing.
Why does white PLA-LW turn yellow?
Yellowing can appear during high-temperature foaming. To reduce it, lower the temperature and choose a different print mode.
Is PLA-LW suitable for strong structural parts?
PLA-LW is better for lightweight shells and models where low mass is important. For high-load structural parts, PETG-CF, PA-CF, ABS-CF, PAHT-CF or another engineering material is a better choice.