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PP vs PP 2.0 Filament: What’s Changed in Printability, Toughness, and Performance?

Products Review

PP vs PP 2.0 Filament: What’s Changed in Printability, Toughness, and Performance?

Polypropylene (PP) is valued for its low density, toughness, fatigue resistance, and chemical resistance. These properties make it useful for functional parts such as living hinges, flexible containers, protective components, and parts exposed to repeated movement.However, PP can be difficult to print consistently. Many users experience lifted corners, bed detachment, layer cracking, or dimensional changes when printing PP filaments. At SUNLU, we have optimized the formula and introduced SUNLU PP 2.0, which is easier to print than SUNLU PP and provides much higher impact strength. Read on to find out what has changed between SUNLU PP and PP 2.0 in terms of printability, toughness, and overall performance.Why Is PP Filament Difficult to Print?But first, let’s take a step back and discuss why PP is difficult to print. Two characteristics of PP account for most printing problems: its semi-crystalline structure and low surface energy.1. Semi-crystalline Shrinkage Creates Internal StressPP is a semi-crystalline polymer. When the extruded PP cools, some of its molecular chains change from a disordered state into more organized crystalline regions. This process causes the material to contract. Because each layer and area of a part experiences a different thermal history, depending on its distance from the heated bed, its exposure to the air, and the airflow from the cooling fan (if the use of cooling fans is recommended), it does not cool and crystallize at exactly the same rate. Corners, outer walls, lower layers, and thicker sections may therefore shrink by different amounts.Such uneven shrinkage creates internal stress. As this stress accumulates, it can pull the edges of the model upward, separate adjacent layers, or change the dimensions of the finished part. Large, flat, or wide models are especially sensitive because contraction occurs across a greater area.For this reason, PP printing is strongly affected by nozzle temperature, bed temperature, ambient temperature, cooling, and print speed.2. Low Surface Energy Makes First-Layer Adhesion DifficultPP is also a non-polar material with low surface energy. Molten PP filament does not easily wet or bond to common printing surfaces such as glass and PEI.If the first layer has weak adhesion, it may be unable to resist the contraction forces generated during cooling. The edges can begin to lift, and in more serious cases, the entire model may detach from the build plate.A suitable build surface and PP-compatible 3D printing glue can help the first layer remain in place while the part cools.What Has Changed in PP 2.0?Compared with SUNLU PP, PP 2.0 features an optimized formulation that results in the following differences in material properties and printing performance.PropertySUNLU PPSUNLU PP 2.0Molding Shrinkage1.50%1.36%Notched Izod Impact Strength5.3 ± 1.5 kJ/m²23 ± 5 kJ/m²Tensile Strength19 ± 3 MPa15 ± 3 MPaFlexural Strength19 ± 3 MPa18 ± 3 MPaElongation at Break850 ± 150%900 ± 300%Heat Deflection Temperature58.5 ± 3°C65 ± 10°CMelt Mass-Flow Rate9.75 ± 2 g/10 min4.4 ± 1 g/10 minDensity0.90 g/cm³1.01 g/cm³Shore Hardness54.5D60D The following four changes are particularly noticeable.1. Lower ShrinkagePP 2.0 3D printer filament has a molding shrinkage rate of 1.36%, compared with 1.50% for SUNLU PP. Its shrinkage rate is 0.14 percentage points lower, a difference of approximately 9.3%.Lower shrinkage produces less contraction stress as the printed material cools. This can reduce the likelihood of warping and dimensional deformation, especially when printing large, flat, or wide models.2. Higher ToughnessThe notched Izod impact strength of SUNLU PP 2.0 is 23 ± 5 kJ/m², compared with 5.3 ± 1.5 kJ/m² for SUNLU PP. The nominal value of PP 2.0 is approximately 4.3 times as high.This allows PP 2.0 to absorb more energy when a part is dropped, struck, or subjected to a sudden localized force. It is therefore suitable for clips, latches, protective housings, and frequently handled functional parts.3. Lower Tensile StrengthPP 2.0 has a tensile strength of 15 ± 3 MPa, compared with 19 ± 3 MPa for SUNLU PP. Its nominal tensile strength is approximately 21% lower.This means PP 2.0 is not always the more suitable option when a part must resist continuous pulling forces or when tensile strength is the main design priority. SUNLU PP may be more appropriate for these applications.4. Higher DensityThe density of PP 2.0 is 1.01 g/cm³, compared with approximately 0.90 g/cm³ for SUNLU PP. For parts of the same volume, PP 2.0 is approximately 12% heavier.The additional mass may be useful for bases, fixtures, or other components where greater weight and a more substantial feel are desirable. PP 2.0 3D printer filament may be less suitable for drones, RC aircraft, wearable parts, and other applications where low weight is important.Which Polypropylene 3D Printing Filament Should You Choose?PP 2.0 does not improve every property of SUNLU PP. It exchanges some tensile strength and low-density performance for lower shrinkage and much higher impact resistance. The choice should therefore be based on the requirements of the finished part.Choose SUNLU PP when low weight and tensile strength are the main requirements. Its lower density (about 0.90 g/cm³) suits lightweight housings and components that need to float, while its higher tensile strength (19 ± 3 MPa) helps parts that carry a steady pulling load. It also suits flexible containers and living hinges that are exposed to repeated bending or chemicals.It is also worth noting that SUNLU PP does not always warp or separate from the bed. Experienced users can greatly reduce the chance of these problems by carefully controlling temperature, cooling, print speed, and first-layer adhesion.Choose SUNLU PP 2.0 when impact resistance and print stability matter more than weight. Its notched impact strength of 23 ± 5 kJ/m² suits parts that face sudden loads, such as protective housings, clips, latches, and workshop fixtures. Its lower shrinkage (1.36%) also makes larger flat parts easier to print with less warping.How to Get Better Printing Results with PP 2.0We recommend a nozzle temperature of 240–260°C, a bed temperature of 40°C, and a printing-speed range of 30–170 mm/s for PP 2.0. The recommended retraction distance is 0.8–1.2 mm, with a retraction speed of 30–40 mm/s.Use these values as a starting point, together with the following practices, to improve your PP 2.0 printing results:Apply a thin, even layer of PP-specific glue or PP-compatible 3D printing adhesive to improve first-layer adhesion.Print the first layer slowly and check that each line is firmly attached to the build surface.Keep the printer away from drafts. A stable ambient temperature is particularly helpful for large parts.Add a brim for models with sharp corners, a small contact area, or a wide base.Start at a moderate speed and increase it only after confirming stable extrusion, layer bonding, and dimensional accuracy.Allow the build plate to cool before removing the finished part.Some of these practices also apply to SUNLU PP 3D printer filament, including the use of PP-compatible adhesive, a stable printing environment, and a brim where necessary.ConclusionCompared with SUNLU PP, PP 2.0 is easier to print, has a lower molding shrinkage rate, and offers higher notched Izod impact strength. These changes improve the practical printing experience and expand its use in impact-resistant functional parts.The upgrade also involves trade-offs. PP 2.0 has lower tensile strength and higher density, so SUNLU PP may still be more suitable for lightweight parts or applications that prioritize tensile performance.The final choice should consider mechanical requirements, printing stability, production efficiency, part weight, and the conditions in which the printed component will be used.To share your experience and exchange printing tips with other users, visit the SUNLU Community.

How 3D Printing Filament Creates Different Surface Effects

Products Knowledge

How 3D Printing Filament Creates Different Surface Effects

The surface of a 3D print is shaped by more than color. Material composition, pigment distribution, layer geometry, temperature, speed, and lighting all influence how the finished object looks and feels. This is why two types of 3D printing filament can produce noticeably different results even when they are printed from the same model.What Is a 3D-Printed Surface Effect?A surface effect is the combined visual and tactile character of a printed part. It includes gloss, color variation, apparent depth, visible layer lines, and textures such as stone-like speckles or wood-like grain.Some effects are mainly optical. Metallic and galaxy filaments, for example, contain pigments that interact with light to create shine, sparkle, or color shifts. Other effects also depend on solid additives. Marble filament may contain contrasting mineral-like particles, while wood filament can include fine wood powder.Moreover, the pigments and solid additives change how noticeable the layer structure is. A scattered pattern can visually break up layer lines, while a reflective finish may emphasize every curve and extrusion path.As a result, the same model can look and feel very different depending on the filament used. The image below compares the surface effects produced by SUNLU High Speed Marble PLA, SUNLU PLA Metallic, SUNLU PLA Galaxy, and SUNLU PLA Wood: What Determines the Final Surface?Material composition creates the basic effect, but it is only the starting point. The final appearance depends on several connected factors:The base polymer determines flow behavior and the general gloss of the surface.Pigments and particles create color variation, sparkle, or natural-looking texture.Layer height controls the size and visibility of individual layer steps.Nozzle temperature affects flow, bonding, and sometimes surface shine.Print speed influences how evenly each extrusion line is deposited.Cooling changes how quickly the material solidifies.Model orientation determines how light reaches the layer lines and decorative pattern.This means the appearance shown on a filament spool is not an exact preview of the finished part. The same material can look smooth and understated on a gently curved vase but more strongly layered on a flat wall or shallow slope.How Special-Effect Filaments Create Their Appearance1. Marble FilamentMarble-style filament combines a light or stone-colored base with small contrasting particles. As the material is extruded, these particles appear as irregular dots and streaks. The random pattern resembles natural stone and helps interrupt the visual continuity of layer lines.Marble filament works especially well for sculptures, architectural models, plant pots, museum-style replicas, and decorative household objects. Larger surfaces usually display the pattern more clearly than very small parts.Because some marble formulations contain solid particles, users should check the manufacturer’s nozzle and maintenance recommendations before printing long jobs.2. Metallic Filament“Metallic” can describe two different material categories. Metallic-look filament uses reflective pigments or additives to imitate the luster of metal while retaining a polymer base. Metal-filled filament contains actual metal powder and may have different printing, nozzle-wear, weight, and post-processing requirements.Metallic-look PLA is a practical choice when appearance matters more than real metal content. Its reflective surface can make curved objects look polished and can give figurines, trophies, cosplay accessories, mechanical display models, and decorative components a cast-metal character.Light direction is important. Broad curves often show a smooth highlight, while uneven extrusion or inconsistent layers may become more visible on a reflective surface.3. Galaxy FilamentGalaxy filament creates visual depth through reflective or color-shifting pigments distributed through the base material. As the viewing angle or light direction changes, different areas may brighten, darken, sparkle, or reveal another tone.This effect is well suited to astronomy models, fantasy objects, jewelry holders, vases, toys, and display pieces. Models with curves, folds, or faceted geometry usually demonstrate the shifting effect more clearly than simple flat panels.4. Wood FilamentWood filament blends a thermoplastic with fine wood particles. The particles soften the uniform plastic appearance and produce a warmer, more organic color and texture. Some formulations may also retain a subtle wood-like scent during or after printing.Layer direction can resemble grain, especially on models with long contours. Wood-style filament is therefore suitable for architectural models, signs, boxes, ornaments, terrain pieces, and decorative objects.Wood-filled materials require attentive temperature control. Excessive heat or long residence time in the nozzle can discolor the material and may increase the chance of residue or clogging. To show how filament composition changes the finished surface, the same model was printed with SUNLU Marble, PLA Metallic, PLA Galaxy, and PLA Wood. Under consistent lighting, Marble produces a stone-like speckled pattern that helps soften visible layer lines, while Metallic creates stronger reflective highlights across curved surfaces. Galaxy adds sparkle and shifting visual depth, whereas Wood gives the model a warmer, more natural-looking texture. Although the model geometry remains identical, each 3D printing filament changes how its curves, layers, and fine details are perceived.How to Choose Filament for Your Target ResultChoose the material by working backward from the finished object:Target EffectSuitable FilamentTypical ApplicationsNatural stone with subdued layer linesMarble PLASculptures, planters, architecturePolished or cast-metal appearanceMetallic-look PLAProps, trophies, display modelsSparkle and changing color under lightGalaxy PLAVases, fantasy models, ornamentsWarm, organic textureWood PLASigns, boxes, décor, scale modelsAlso consider the model’s geometry. Reflective materials reward smooth curves, galaxy effects benefit from changing angles, and patterned marble surfaces work best when there is enough area to show their particle distribution.For functional parts, appearance should not replace mechanical evaluation. Check the base material’s strength, heat resistance, layer adhesion, and environmental suitability separately.How to Improve the Finished SurfacePrint a small sample before committing to a large model. A swatch reveals how the filament behaves under your actual lighting, printer settings, and layer orientation.Keep the exterior wall speed stable, place the seam in a less visible location, and use a layer height appropriate for the viewing distance. Make sure the filament is stored correctly, because moisture can contribute to bubbling, rough extrusion, and inconsistent gloss.Post-processing should match the effect. Wood-style parts can often be sanded for a softer appearance, while sanding a galaxy or metallic surface may remove or dull the optical finish. Test any sanding, polishing, coating, or painting process on a sample first.Explore Special-Effect Filaments from SUNLUSUNLU offers several materials designed for appearance-focused projects. SUNLU High Speed Marble PLA uses inorganic microparticles to create a stone-like pattern. SUNLU PLA Metallic provides a metal-like surface in colors such as Marrakech Bronze, Brass Gold, and Azurite.For changing color and light effects, SUNLU PLA Galaxy uses an iridescent formulation intended for decorative prints. SUNLU PLA Wood contains 15% wood powder and is available in several wood-inspired colors.The right 3D printing filament connects material composition with the intended visual result. Select the effect that suits your model, begin with the recommended printing profile, and refine temperature, speed, cooling, and layer height through small test prints. This controlled approach is the most reliable way to turn a special-effect spool into a convincing finished surface.

How to Choose Engineering Resin for 3D Printing

Products Knowledge

How to Choose Engineering Resin for 3D Printing

Standard photopolymer resin works well for display models, but it often falls short once a part has to carry load, withstand heat, resist solvents, or hold tight tolerances. In these cases, engineering resins offer a practical alternative. However, the wide range of labels and datasheet values can make selection confusing. This article explains the general properties of engineering resins, shows how to choose one by application, and describes how printing and post-processing affect the final result.What Are the Key Properties of Engineering ResinsBefore selecting an engineering resin, it is necessary to know the key properties and what each of them means. Tensile strength and flexural strength measure how much stress a part withstands when pulled or bent. They describe resistance to deformation, not resistance to sudden shock.Impact strength (for example, notched Izod, in J/m) measures energy absorption during a sudden blow. A resin can have high tensile strength but low impact strength. Such a material is strong yet brittle, and it cracks under shock loads.Elongation at break shows how far a material stretches before failing. High elongation usually indicates ductility, while low elongation suggests brittleness. Tough parts generally combine moderate strength with good elongation.Heat deflection temperature (HDT) is the temperature at which a specimen deforms under a defined load. It is often mistaken for the melting point or the glass transition temperature. HDT is a comparative indicator of short-term thermal load capacity, not a guarantee of long-term performance at that temperature.Dimensional stability refers to how well a part keeps its size and shape over time and across temperature changes. It should not be confused with print accuracy. Accuracy describes how closely the part matches the model at the time of printing, whereas stability describes how the part behaves afterward, including warpage, creep, and moisture or heat effects.Note that each engineering resin formulation is designed around a particular combination of properties, and improving one often reduces another. A formulation designed for heat resistance typically has a high HDT and high hardness, but its impact strength may be lower. A formulation designed for toughness absorbs shock and stretches before breaking, but it usually softens at a lower temperature. A formulation designed for dimensional control has low shrinkage but high stiffness, which can reduce flexibility.How to Choose the Right Engineering ResinA reliable selection process works backward from the use of the part. The logic is Application → Performance Requirement → Resin Selection.ApplicationKey Performance RequirementWhat to Check on the DatasheetSnap-fit enclosureImpact strength, elongationNotched Izod, elongation at breakFunctional gear or hingeWear resistance, flexibilityElongation at break, hardnessMold insert, hot-air fixtureHigh HDT, hardnessHDT, Shore DAssembly jig, gaugeRigidity, low shrinkageFlexural modulus, shrinkageThree questions help narrow the choice. First, what load does the part carry: static, cyclic, or impact? Second, what is the maximum operating temperature, and for how long? Third, how tight is the tolerance, and does the part touch chemicals?Consider a simple example. A bracket that holds a sensor near a motor must resist vibration and moderate heat. The vibration points to toughness and elongation, while the heat sets a minimum HDT. If no single resin meets both, the designer must decide which requirement is more critical and test a sample.What Else to Consider When Using Engineering ResinEven the right resin underperforms if the process is poorly controlled. Datasheet values come from specimens printed and cured under specific conditions, so parts made with different settings may not reach the same performance. The following factors have the greatest influence on the final result.Exposure. Underexposure causes weak layer bonding and soft, sticky parts. Overexposure increases brittleness, reduces detail, and causes dimensional growth. A calibration test for each printer and resin is the most dependable way to find the right range.Layer height and orientation. Thinner layers improve surface quality but increase print time and the number of layer interfaces. Because layer interfaces are usually the weakest plane, the part should be oriented so that the main load does not pull the layers apart.Washing. Isopropyl alcohol removes uncured resin. Insufficient washing leaves a tacky film that cures unevenly, while excessive soaking can cause some resins to swell or crack. A short, controlled wash followed by thorough drying is recommended.Post-curing. Under-curing leaves low strength and poor stability, while over-curing can make parts brittle and cause warpage. Even exposure from all sides, using the time recommended by the manufacturer, gives the most consistent results. Heat-resistant resins may also need a thermal post-cure to reach the stated HDT.Which Engineering Resin for Parts Exposed to High TemperaturesWhen a fixture, mold insert, or test component must remain rigid near a heat source, heat resistance becomes the first selection criterion. SUNLU High Temperature Plus Resin has a heat deflection temperature of up to 170°C and can retain its shape during short-term exposure to 300°C for approximately three minutes, helping fixtures, mold-verification parts, and test components retain their intended shape under sustained heat.With a flexural strength of 82 MPa and a Shore hardness of 87D, the cured resin resists bending and surface indentation. A positioning fixture can therefore continue holding a component at the required angle or distance after heating. Its 7% elongation at break indicates a rigid material profile, making it more suitable for shape-retaining parts than for clips or hinges designed to flex repeatedly.ConclusionChoosing an engineering resin is not about finding the strongest material. It is about identifying what the part must actually do. Start with the application, define the most important performance requirements, and then compare resin properties such as strength, impact resistance, elongation, HDT, and dimensional stability. Just as importantly, consider printing orientation, exposure, washing, and post-curing, because processing conditions can significantly affect the final part.Keeping that in mind, you can achieve more reliable performance and avoid choosing a material based on a single impressive datasheet value.

Discover the Creative Power of 3D Printing in a Coffee Space

Event

Discover the Creative Power of 3D Printing in a Coffee Space

01 Say Goodbye to the Ordinary, Create a Space That Feels Truly Yours“Everyone enjoys making something that’s truly one of a kind.”— Owner of CT Model Coffee ShopWhether you’re running a physical store or creating scale models, you often encounter similar challenges.For physical stores: Mass-produced decorations and tabletop pieces tend to have a uniform look, making it difficult to match the unique style of each shop. Small-batch custom items featuring a store logo or exclusive design can also be too costly.For mecha model enthusiasts: Available accessories often come in fixed designs, while niche parts can be difficult to find. Many personalized ideas simply don’t have an affordable way to become reality.This is where the flexibility of 3D printing can make a difference. Without the need for complex modeling, creators can simply fine-tune and adapt open-source models to bring their ideas to life at a low cost, making it easier to create truly personalized objects for any space.02 Create with Ease: SUNLU PLA for Everyday Creativity“SUNLU filament delivers reliable print performance with minimal clogging and stringing.”— Owner of CT Model Coffee ShopFor this collaborative project, CT Model Coffee Shop used SUNLU PLA filaments throughout the entire DIY creation process. As one of the most popular materials for everyday 3D printing, PLA is known for being easy to print and more environmentally friendly. It offers smooth printing, low warping, and reliable extrusion, making it especially beginner-friendly. With less need for repeated parameter adjustments, users can achieve consistent results with ease.3D-printed items such as coffee cup coasters, desktop tissue boxes, and decorative pieces combine visual appeal with practicality. They complement the coffee shop’s minimalist atmosphere while fitting naturally into the clean, structured aesthetic of mecha collectibles. Every detail in the space reflects a thoughtful touch of customization and creativity.By using 3D printing to create custom pieces for CT Model Coffee Shop, the project brought a hobby into everyday life and turned creative ideas into practical solutions for the business.03 Explore the Boundaries of Creativity with 3D Printing“I’m planning to print a two-meter-tall model to make the visual impact even more impressive.”— Owner of CT Model Coffee ShopCoffee brings comfort to everyday life, while models reflect the things we love. 3D printing gives ideas a tangible form. With a reliable spool of filament and a passion for creating, ideas can move beyond imagination and become part of everyday life.Looking ahead, the owner plans to continue using 3D printing to add more personalized details to the shop—from refining practical everyday items and creating exclusive gifts for customers to exploring more ways to bring creativity into everyday spaces. They also plan to experiment with large-scale mecha models, creating an eye-catching signature feature for the shop.SUNLU joins hands with CT Model Coffee Shop to explore more possibilities for integrating 3D printing into everyday retail spaces.By bringing 3D printing into diverse, real-life creative scenarios, we aim to lower the barrier to creation and turn ideas into tangible objects. 3D printing gives form to the things we love, transforming inspiration from our minds into creations we can see, touch, and use.

Dehumidifier vs Dryer: What Are the Differences?

Products Knowledge

Dehumidifier vs Dryer: What Are the Differences?

Most 3D printing filaments are hygroscopic, meaning they actively absorb moisture from ambient air. Even a few days of exposure in average room humidity can noticeably wet your spool. When wet filament enters a 200°C+ hotend, trapped water rapidly boils into steam, resulting in stringing, rough surface textures, layer delamination, and brittle prints.This issue actually creates two needs: drying wet filament and keeping unused filament dry. These are often addressed with filament dryers and dehumidifier cabinets. In this guide, we will break down their working principles, key differences, and how to choose the right setup for your 3D printing needs.Filament Dryer: Active Thermal Moisture RemovalA filament dryer is designed for one primary goal: active moisture extraction. It is an active, restorative solution for spools that have already absorbed ambient moisture.Core PrincipleAmbient moisture doesn’t just sit on the filament’s surface; water molecules bind deeply within the polymer chains. A filament dryer uses thermal energy to break these molecular bonds and evaporate the trapped moisture.Working LogicSpecifically, the filament dryer uses PTC heating elements and internal circulating fans to warm the entire chamber to target temperatures (typically 45°C–70°C+ depending on material). As heated air sweeps across the spool, it strips moisture away and vents the humid air out through exhaust ports. Many models also include PTFE pass-through tubes, allowing you to feed filament directly into your extruder while actively heating.Intended UsesA filament dryer is particularly useful for reviving saturated spools that have been left exposed on open shelves and for providing immediate, pre-print thermal conditioning. It can also maintain heat throughout multi-day prints, helping prevent the filament from re-absorbing moisture during extended printing.Target UsersIt is well suited to hobbyists and creators who typically work with one to four active spools and need filament ready to print on demand.Filament Dehumidifying Cabinet: Long-Term Low-Humidity StorageA filament dehumidifying cabinet serves a fundamentally different purpose: continuous, preventative moisture management.Core PrincipleDehumidifying is about preservation, not baking. Its goal is to maintain an ultra-low relative humidity (RH) environment (<15% RH) at room temperature, ensuring dry filament does not have the opportunity to absorb moisture.Working LogicThe cabinet uses molecular sieve physical adsorption paired with an intelligent cycling system. High-grade molecular sieves actively trap airborne water vapor within the sealed cabinet. Through an automated, smart regeneration cycle, the system periodically vents the captured moisture outside the unit—all while keeping the internal storage compartment at a steady, unheated room temperature.Intended UsesA dehumidifying cabinet is designed for long-term filament storage, keeping dry filament ready for use between prints. It is particularly useful for spools that may sit unused for days or weeks and need protection from ambient humidity.Target UsersA dehumidifying cabinet is suited to makers with growing spool libraries, as well as studios and print farms managing dozens of open rolls across different colors and materials. Why Not Just Use Sealed Bags or Store Spools in a DryerOne may ask: why not just stick to traditional storage bags or keep spools inside a heated dryer box?This is because both approaches present distinct practical limitations for day-to-day use:l Limitations of Sealed Bags & Desiccants: Vacuum bags can puncture easily, ziplock bags may lose their seal over time, and silica gel packs eventually become saturated without providing a clear indication. A dehumidifying cabinet maintains a consistently dry environment without requiring users to repeatedly replace or monitor desiccants.l Drawbacks of Continuous Dryer Use: Keeping a thermal dryer running 24/7 consumes more electricity and exposes filament to prolonged heat, which may contribute to thermal fatigue or spool deformation over time. A dehumidifying cabinet provides room-temperature storage without continuous heating, making it more suitable for long-term filament preservation.Filament Dryer vs Dehumidifier CabinetFilament DryerDehumidifier CabinetWorking PrincipleThermal heating + active air circulation & ventingPhysical adsorption + intelligent cyclingCore GoalEvaporate deep moisture & enable direct-feed printingLong-term ambient prevention & low-humidity storageOperating TemperatureHeated (45°C – 70°C+)Ambient / room temperature (no heat damage)CapacityLower capacityHigher capacityUsage CycleIntermittent / batch runs (4–12 hours per session)24/7 continuous, permanent operationSpool StateTreats already-wet spoolsKeeps dry/baked spools factory-freshEnergy ImpactModerate (100W–300W during active heating)Ultra-low (~10W–30W standby/cycling)Best ApplicationPre-print preparation & active print feedingSpool inventory library & bulk material preservationTarget UsersRestore moisture-affected filament and quickly return it to a printable condition.Focus on long-term storage and daily filament management to help reduce moisture reabsorption.How to Choose the Right SetupThe right setup depends less on personal preference and more on two concrete factors: what materials you print, and how much filament you keep in rotation.1. MaterialRegular Materials (PLA, PETG): Moderate moisture absorption. A compact filament dryer is often enough for occasional baking before demanding print jobs.Engineering & Highly Hygroscopic Materials (TPU, PA/Nylon, PC, PVA): Extreme moisture sensitivity. Nylon and PVA can degrade print quality after just 4–6 hours of open-air exposure. These materials require active drying in a heated unit plus long-term storage in a dry cabinet.2. Inventory & ScaleIndividual Makers: A 1- or 2-spool dryer covers daily routines.Studios & Multi-Color Enthusiasts: A dehumidifier cabinet eliminates the headache of having 10+ open spools absorbing moisture simultaneously.Print Farms & Industrial Workshops: Both are essential to guarantee batch repeatability and minimize failed prints on engineering-grade parts. SUNLU Filament Drying and Dehumidifying SolutionsAt SUNLU, we provide both filament dryers and dehumidifying cabinets to address different filament moisture management needs.Our SUNLU Filament Dryer is designed to actively dry filament that has already absorbed moisture. We offer different configurations, including the SUNLU AMS Heater and SUNLU AMS Lite Heater, which use controlled heating to help remove moisture from filament before and during printing. These solutions are suitable for makers who need to condition filament before demanding print jobs or keep filament dry while printing.For long-term storage, our SUNLU i10 Filament Dehumidifying Cabinet takes a different approach. Instead of continuously heating the filament, it maintains a low-humidity environment at room temperature to help prevent dry filament from absorbing moisture during storage. Its larger capacity also makes it suitable for users managing multiple spools.With both heated filament drying and low-humidity storage solutions, we offer options for different filament conditions, usage patterns, and storage requirements.ConclusionChoosing between a filament dryer and a dehumidifying cabinet depends on whether the goal is to remove existing moisture or prevent moisture from returning. A dryer uses heat to restore wet filament, while a dehumidifying cabinet maintains a low-humidity environment for long-term storage. At SUNLU, we offer solutions for both needs, helping makers keep their filament dry, protected, and ready for reliable 3D printing. Browse our 3D printing filaments and filament accessories to find the right fit for your setup.

3D Printing Filament Storage Guide: How to Keep Filament Dry and Protect Print Quality

Products Knowledge

3D Printing Filament Storage Guide: How to Keep Filament Dry and Protect Print Quality

Moisture is one of the common causes of inconsistent 3D printing results. During storage, filament can absorb moisture from the surrounding air, especially when exposed to high-humidity environments for extended periods. Depending on the material, moisture absorption can affect extrusion stability, surface quality, layer adhesion, mechanical properties, and overall print reliability.Proper filament storage is therefore about more than simply keeping filament away from water. Effective storage requires controlling the surrounding humidity and minimizing the filament’s continued exposure to moisture in the air.This guide explains how humidity affects 3D printing filament, why drying and storage serve different purposes, and how a dehumidifying storage cabinet such as the SUNLU FilaDC i10 Filament Dehumidifying Cabinet can help maintain more stable filament conditions between prints.Why Does 3D Printing Filament Need Proper Storage?Most 3D printing filaments have some degree of hygroscopicity, meaning they can absorb moisture from the surrounding environment. The rate and amount of moisture absorption depend on factors such as material type, ambient humidity, temperature, exposure time, and the condition of the filament itself.Once moisture enters the filament, it can affect extrusion during printing. Depending on the material and its moisture content, users may experience bubbling, popping, stringing, inconsistent extrusion, rough surfaces, or reduced mechanical performance.Some materials are particularly sensitive to moisture. These commonly include:Nylon and other polyamide-based materialsTPU PVAThese generally require more careful moisture management than PLA. However, even materials that are relatively less moisture-sensitive can benefit from proper storage when exposed to humid environments for extended periods. Always follow the manufacturer’s storage guidelines for each material.The key point is that filament condition can change not only during printing, but also gradually while the filament is sitting on a shelf or stored between uses.Relative Humidity and Filament Moisture Content Are Not the SameRelative humidity (RH) describes the amount of moisture in the air relative to the maximum amount of moisture the air can hold at a given temperature. It is an environmental measurement and does not directly indicate how much moisture is actually contained within the filament.Filament moisture content refers to the amount of water that the material has actually absorbed. The two are related, but they should not be treated as equivalent measurements.For example, placing a spool of filament in a storage cabinet at 10% RH does not mean that the filament itself will immediately become extremely dry. If the filament has already absorbed moisture, it will take time for moisture to gradually migrate out of the material and for the filament to move toward a more stable state in the controlled environment.Therefore, when evaluating a filament storage system, it is important to distinguish between ambient humidity and filament moisture content. A low-RH environment can help reduce further moisture absorption, but it should not simply be interpreted as a rapid drying process.Does Lower Humidity Always Mean Better Filament Storage?Lower humidity generally helps reduce the amount of moisture that filament is exposed to. However, this does not mean that the lowest possible RH is necessarily ideal for every material or application.Filament performance is influenced by its polymer composition as well as its storage conditions. Some PLA materials, for example, may become relatively more prone to brittleness after prolonged exposure to extremely dry conditions. This does not mean that PLA should always be stored within one specific RH range. Rather, it highlights the importance of considering the characteristics of the material itself instead of treating a single humidity value as a universal standard for all filaments.For everyday filament storage, the more important goal is to maintain a controlled and relatively dry environment while minimizing unnecessary exposure to moisture.How Long Does Filament Take to Reach a Stable Condition?The time required for filament to reach a stable condition depends on factors such as its initial moisture content, material type, spool size, environmental conditions, and storage system.If filament has been exposed to a humid environment for an extended period, the time required to reach a stable condition in a controlled low-humidity environment will vary depending on the material. The exact time can also be affected by factors such as filament type, spool size, initial moisture content, and the conditions inside the dehumidifying cabinet.The FilaDC i10 is designed to help maintain the condition of dry filament and support long-term storage in a low-humidity environment. However, it is not intended to replace the function of a dedicated filament dryer. In comparison, filament that is already relatively dry may reach a stable storage condition more quickly.This difference also highlights why a dehumidifying storage cabinet should not be considered a replacement for a dedicated filament dryer. A dehumidifying storage cabinet is primarily designed to maintain a controlled storage environment, rather than rapidly remove a large amount of moisture from heavily saturated filament.Drying vs. StorageAspectDryingStoragePrimary goalRemove moisture already absorbed by filamentPrevent filament from absorbing moisture againWhen to useBefore printing, when filament shows moisture issuesBetween prints and over longer periodsSpeedTargets faster moisture removalMaintains a stable, controlled environmentTypical deviceDedicated filament dryerDehumidifying storage cabinet (e.g. FilaDC i10)Why Can Humidity Temporarily Increase During Dehumidification?Users may sometimes notice that the humidity displayed inside a dehumidifying storage cabinet does not continuously decrease and may temporarily increase instead. This can be a normal part of the moisture-control process.The SUNLU FilaDC i10 uses a moisture management system based on adsorption and regeneration. During regeneration, moisture collected by the desiccant is released and removed from the system. As a result, the heating and moisture-removal process may cause temporary changes in the RH reading inside the cabinet.After regeneration is completed and the system cools down, it returns to the moisture-adsorption stage. As the air inside the cabinet and the stored filament gradually move toward a more balanced condition, the humidity reading will also stabilize.Therefore, the RH displayed by the cabinet should be understood as a measurement of the current humidity of the air inside the cabinet, rather than a direct measurement of the actual moisture content of each spool of filament.Why Does the SUNLU FilaDC i10 Use Molecular Sieves?The SUNLU FilaDC i10 uses a molecular-sieve-based moisture management system to maintain a low-humidity environment for filament storage.Molecular sieves are porous materials capable of selectively adsorbing water molecules. Their moisture adsorption properties make them suitable for applications that require relatively low-humidity environments.Under the company’s test conditions, molecular sieves demonstrated stronger performance in maintaining low humidity compared with silica gel. After 1,000 regeneration cycles, the molecular sieve retained approximately 95% of its water adsorption capacity, while the silica gel used in the same internal comparison test retained approximately 70%. Based on internal testing; actual results may vary by environment.What Is the Maximum Temperature of the SUNLU FilaDC i10 PTC Heating Module? Can It Regenerate the Molecular Sieve?The i10 PTC heating module has a maximum tested temperature of 260°C (500°F) under specified test conditions. However, this does not mean that every part of the molecular sieve reaches or continuously remains at 260°C during each operating cycle.Molecular sieve begins to desorb absorbed moisture at approximately 230°C (446°F). Since the i10 PTC heating module can reach up to 260°C under test conditions, it provides the heat required for moisture desorption and molecular sieve regeneration.Actual desiccant temperature and regeneration performance may vary depending on factors such as ambient temperature, airflow, desiccant quantity, and cycle duration.How Does the SUNLU FilaDC i10 Maintain a Low-Humidity Environment?The FilaDC i10 uses continuous moisture management rather than relying solely on heating the filament to achieve drying.The system monitors the humidity inside the cabinet and manages moisture through a cycle that includes adsorption, regeneration, moisture removal, and cooling. When humidity rises, the system can initiate the regeneration and moisture-removal process before returning to the adsorption stage.Because moisture can continuously enter the cabinet through the filament itself as well as through normal door openings, maintaining a low-humidity environment requires ongoing moisture management rather than a one-time drying cycle.This is an important distinction between the FilaDC i10 and traditional heated filament dryers. The primary purpose of the FilaDC i10 is to provide a controlled storage environment for filament between printing sessions.How to Build Better 3D Printing Filament Storage HabitsDeveloping an effective filament storage routine starts with understanding the current condition of the filament.A simple storage routine:1. Check – Assess whether the filament shows signs of moisture-related printing issues.2. Dry – If needed, use an appropriate drying method based on the material’s characteristics.3. Store – Once the filament is in a suitable condition, place it in a controlled low-humidity environment.4. Maintain – Keep the filament in the controlled environment between uses to reduce further moisture absorption.For filament that is already dry, storing it in a controlled low-humidity environment can help maintain its condition for longer, particularly in humid environments.Consistency is one of the most important principles of filament management. If stable printing performance is the goal, filament should ideally not be repeatedly moved between a dry environment and humid open air.How Does the SUNLU FilaDC i10 Fit into Filament Storage?The FilaDC i10 is primarily designed for the storage stage of filament management. Instead of exposing dry filament to indoor air after every printing session, users can keep their filament in a controlled low-humidity environment between uses.This approach can be particularly useful for users who frequently work with moisture-sensitive materials or need to store multiple spools for extended periods. By continuously monitoring and managing humidity, the FilaDC i10 helps reduce the risk of filament repeatedly absorbing moisture during storage.For users who frequently switch between different materials, work on long-term printing projects, or live in humid environments, maintaining a stable storage environment can become an important part of achieving more consistent printing results.ConclusionFilament storage is an important part of achieving consistent 3D printing results. Taking filament out of a dryer does not mean moisture management is finished. For long-term storage, keeping filament in a controlled environment is equally important.The key is to understand the difference between drying and storage. Drying is intended to remove moisture that the filament has already absorbed, while low-humidity storage helps prevent the filament from absorbing moisture again.For users who want to better protect filament between printing sessions, a dedicated dehumidifying storage solution such as the SUNLU FilaDC i10 Filament Dehumidifying Cabinet can provide a controlled environment through continuous humidity management. Learn more about the SUNLU FilaDC i10.Better filament management does not begin and end with choosing the right material. It extends throughout the entire workflow—from storage and preparation to printing—helping keep filament in a suitable condition for more consistent results.

Formnext Frankfurt Germany 2026

Exhibition

Formnext Frankfurt Germany 2026

Meet SUNLU at Formnext 2026SUNLU is heading to Formnext 2026 in Frankfurt, Germany!As one of the world’s leading events for additive manufacturing and next-generation production technologies, Formnext brings together innovators, manufacturers, engineers, and industry professionals from across the global 3D printing community.Visit SUNLU to discover our latest developments in 3D printing filaments, engineering materials, filament drying solutions, resins, and professional 3D printing accessories. Our team will be there to introduce our newest products, share insights into material applications, and connect with partners and professionals from around the world.Event Details📅 November 17–20, 2026  📍  Messe Frankfurt, Frankfurt, Germany🏢 Hall 12.0🎯 Booth C11Make sure to stop by and meet the SUNLU team at Hall 12.0, Booth C11.We look forward to seeing you in Frankfurt and exploring new possibilities in additive manufacturing together!

Keep It Dry, Print It Right: Inside the i10 Filament Dehumidifying Cabinet

Products Knowledge

Keep It Dry, Print It Right: Inside the i10 Filament Dehumidifying Cabinet

Proper 3D filament storage requires keeping spools sealed and dry. When exposed to humid air, filaments can absorb moisture and cause issues such as stringing, bubbling, and whitening in a print. Materials such as nylon, PVA, and TPU are particularly susceptible because they absorb moisture from the air more readily than other filaments.That’s why we at SUNLU have joined forces with Inslogic to introduce the FilaDC i10, a convenient and reliable filament storage solution.This filament dehumidifier adopts innovative dehumidifying technology while offering generous storage space, a tightly sealed design, low energy consumption, convenient and quiet operation, and multiple safety protections.Molecular Sieve DehumidificationThe FilaDC i10 is based on physical moisture adsorption and smart cycling. During operation, the molecular sieve first adsorbs moisture from the air inside the cabinet. PTC heating then releases the collected moisture and cools down to restore the molecular sieve adsorption capacity. This cycle repeats automatically to provide continuous humidity control, helping maintain a stable storage environment with relative humidity levels between 10% and 45%.By controlling moisture rather than relying on prolonged high-temperature storage, the FilaDC i10 helps reduce moisture-related degradation and keeps filament in a more stable condition during storage.Moreover, the cabinet can be used to protect other moisture-sensitive items, such as camera lenses, powders, electronic components, and tools. This makes it a versatile storage solution. Large Storage CapacityWith an internal space measuring 385 mm long, 258 mm wide, and 488 mm high, the i10 can store up to ten 1 kg filament spools at the same time. It also supports filament spool sizes ranging from 0.25 kg to 5 kg, giving users more flexibility when storing different materials and spool formats.For studios, print farms, and users with growing filament collections, multiple cabinets can be stacked to expand storage capacity while keeping the setup neat and saving valuable floor space. For the best balance of accessibility and everyday usability, stacking up to three cabinets is recommended. Strong and Long-Lasting Moisture ProtectionGood moisture protection starts with a tight seal. The FilaDC i10 Filament Dehumidifying Cabinet features a tight sealing gasket to prevent moisture and three strong magnets that can hold the door firmly closed. This design helps maintain a consistently dry storage environment, keeping filaments in better condition and ready for reliable printing.Low Energy OperationYou may be concerned that, since the FilaDC i10 cabinet needs to stay powered continuously, it might lead to high electricity costs. The truth is, the FilaDC i10 consumes only around 0.23 kWh over 24 hours. This low energy consumption makes it suitable for continuous usage. You can keep it running without worrying that a spike appears in your electricity bill.The figure was tested at 25°C and 60% relative humidity in an empty chamber and actual results may vary depending on your environment. Quiet OperationThe FilaDC i10 also operates at less than 30 dB. Its sound level is comparable to rustling leaves, allowing it to run quietly in homes, offices, workshops, and print rooms.Easy to Use and Ready Out of the BoxWeighing only 5.8 kg and featuring a recessed handle, the FilaDC i10 is easy to position or move when needed. Its integrated design requires no complicated installation, so it is ready to use straight out of the box.Filament can remain inside the cabinet until you are ready to print. Test data shows that PETG filament with an initial moisture content of 0.34% dropped to 0.21% after being stored in the FilaDC i10 for 96 hours.  By comparison, PETG with an initial moisture content of 0.35% increased to 0.39% after being left exposed for the same period. As you can see below, properly stored filament produces cleaner and more consistent results. The print on the left was made with PETG at 0.21% moisture content, while the one on the right used PETG at 0.39% moisture content.  Multiple Safety ProtectionsThe FilaDC i10 includes both hardware and software protection for safer long-term operation. At the hardware level, the PTC heating unit is equipped with a secondary temperature protection switch. At the software level, an intelligent temperature-control system continuously monitors operating conditions. If an excessive temperature is detected, the system provides a real-time warning, adding another layer of protection for the cabinet, filament, and surrounding workspace.The $1 Early Access Pass to the i10 Is Now AvailableThe FilaDC i10 Filament Dehumidifying Cabinet combines reliable room-temperature humidity control, large storage capacity, and convenient operation. It provides a practical way to protect filament quality and support more consistent printing results.The $1 Early Access Pass is now available. Pay just $1 to receive $10 off your FilaDC i10 pre-order, and the discount can be stacked on top of the pre-order price.The product is priced at $199.99, and stay tuned for the pre-order price!Claim Offer

SUNLU Strengthens Its Filament Lineup with Silk 2.0 and PETG 2.0 Materials

Products Knowledge

SUNLU Strengthens Its Filament Lineup with Silk 2.0 and PETG 2.0 Materials

SUNLU continues to expand its 3D printing filament portfolio with PETG 2.0 and Silk 2.0, two materials developed to address common challenges faced by makers while improving the overall printing experience.PETG 2.0: Designed for More Consistent PrintingPETG is one of the most used filament on the market and in the same time sensitive to moisture. When exposed to humidity, water molecules can penetrate the material and interact with its molecular structure, causing problems such as stringing, bubbles, and poor layer adhesion. Our PETG 2.0 has been developed to remove the moisture concern from the head of the users, helping them to achieve more consistent printing results straight out of the box.Our testing demonstrates how moisture content can influence print quality over time. In controlled testing, PETG 2.0 maintained normal tower-tip printing even after being left in the open for 15 days, while other filament brand would experience stringing,bubbles and failures. The testing also highlights the importance of proper filament storage and drying to maintain consistent performance.The testing further demonstrates the benefits of drying PETG 2.0 before printing. After drying at 65°C for 12 hours, the filament was tested again after being exposed to different conditions, allowing us to evaluate how moisture levels affect printing performance.Silk 2.0: A More Refined Silk Finish with Improved PerformanceAlongside PETG 2.0, We are also introducing Silk 2.0, developed to improve upon the visual qualities traditionally associated with silk PLA while addressing some of the performance limitations users may experience with silk filaments.Silk 2.0 delivers a high-gloss, eye-catching surface finish, making it particularly suited to decorative models, display pieces and other projects where appearance is important. SUNLU's testing includes comparisons with existing silk filaments and competing products using brightness measurements to evaluate the visual finish.However, Silk 2.0 is designed to go beyond appearance alone. We highlights its improved notch impact performance, providing an advancement in mechanical performance compared with conventional silk filament. This development addresses a common concern with silk PLA, which can be more prone to brittleness and breakage.With PETG 2.0 focused on more consistent moisture-sensitive printing and Silk 2.0 combining a striking silk finish with improved toughness, We continue to develop materials designed to meet both the functional and creative needs of today's 3D printing community.