QTS ASA+ 3D Printer Filament 1.75mm — Weather Resistant, UV Resistant, Low Moisture
This filament features enhanced low moisture absorption, ensuring reliable printing even in humid conditions and on open-frame printers without strict temperature control. It provides strong layer adhesion and excellent chemical resistance.
QTS ASA+ 3D Printer Filament 1.75mm — Weather Resistant
Low Moisture Absorption | Superior Layer Adhesion | High Impact Resistance | 5+ Year Outdoor UV Resistance
Engineered for true outdoor performance. QTS ASA+ combines the toughness of ABS with the superior weatherability of ASA — enhanced with a proprietary low-moisture formula that allows reliable printing even on open-chamber FDM printers. Trusted by 8,000+ customers across 15+ years of 3D printing expertise.
6 Core Advantages of QTS ASA+
Low Moisture Absorption
Moisture absorption <0.3% — no excessive drying required. Stable in humid environments and prints reliably on open-chamber printers without quality loss.
Superior Layer Adhesion
Outstanding Z-axis strength and impact resistance. Layer bonding is significantly higher than standard ASA, producing parts that are structurally reliable and long-lasting.
Excellent Chemical Resistance
Resists common chemicals and solvents. Ideal for industrial environments and applications where exposure to acids, bases, or cleaning agents is expected.
5+ Year UV & Weather Resistance
No yellowing, no embrittlement after years of outdoor exposure. Color and mechanical performance remain stable — the gold standard for outdoor-grade 3D printing.
Mild Odor vs. ABS
Significantly milder odor compared to traditional ABS. Fewer plastic particles emitted during printing, creating a more comfortable and safer workspace.
Broad Printer Compatibility
Compatible with all FDM 3D printers, including open-chamber models. No specialized enclosure required — even entry-level machines deliver excellent results.
Applications & Use Cases
| Application | Examples | Key Benefit |
|---|---|---|
| Outdoor Products | Antennas, sensors, wind turbine blades, garden tools | 5+ year UV stability |
| Drone & UAV Parts | Drone frames, guards, mounts, structural components | High impact + low weight |
| Industrial Fixtures | Jigs, molds, electrical enclosures, junction boxes | Chemical + heat resistance |
| Automotive Parts | Exterior trim, brackets, custom modification parts | Weather + UV durability |
| Consumer Electronics | Outdoor device enclosures, charger shells, controller cases | Color stability outdoors |
| Sports & Recreation | Bike accessories, phone mounts, protective gear | Impact resistance + durability |
Material Comparison: ASA+ vs ASA vs ABS vs PETG
| Performance | QTS ASA+ | Standard ASA | ABS | PETG |
|---|---|---|---|---|
| Moisture Absorption | Lowest (<0.3%) | Medium | Medium | Low |
| Layer Adhesion | Highest | High | High | Highest |
| Impact Resistance | Highest | High | High | Highest |
| UV / Weather Resistance | Excellent (5+ yr) | Excellent | Poor | Medium |
| Chemical Resistance | Excellent | High | Medium | Medium |
| Print Difficulty | Easy (Open Chamber) | Medium | Medium | Easy |
| Warping Risk | Low | Low | Medium | Very Low |
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Material Type | Enhanced ASA (Low Moisture Formula) | -- |
| Diameter | 1.75 mm ±0.03 mm | Micrometer measurement |
| Net Weight | 1 kg (2.2 lbs) / Spool | -- |
| Moisture Absorption | < 0.3% | ISO 62 |
| Density | 1.07 – 1.11 g/cm³ | ISO 1183 |
| Tensile Strength | 45 – 52 MPa | ASTM D638 / ISO 527 |
| Flexural Strength | 70 – 78 MPa | ASTM D790 / ISO 178 |
| Impact Strength (Notched Izod) | 16 – 20 kJ/m² | ASTM D256 / ISO 180 |
| Heat Deflection Temp (HDT) | 100 – 110°C (212 – 230°F) | ASTM D648 / ISO 75 |
| Glass Transition Temp (Tg) | 108 – 115°C (226 – 239°F) | DSC (ISO 11357) |
| Recommended Print Temp | 240 – 270°C (464 – 518°F) | -- |
| Recommended Bed Temp | 100 – 115°C (212 – 239°F) | -- |
| Recommended Print Speed | 45 – 90 mm/s | -- |
| Drying Conditions | 70°C for 2 hours (Optional) | -- |
| UV Resistance | Outdoor Grade — 5+ Years No Yellowing | ASTM G154 (UV Weathering) |
| Certifications | RoHS Compliant, REACH Compliant | EU Directive 2011/65/EU |
| Packaging | Vacuum Sealed (Moisture Protection) | -- |
How to Print ASA+ — Best Practices
Step 1: Bed Adhesion
Use a PEI sheet, glass bed with glue stick, or BuildTak surface. Apply a thin layer of adhesive spray (e.g., QTS PrintFix) to significantly reduce warping and improve first-layer adhesion.
Step 2: Temperature Settings
Set nozzle to 240–270°C and bed to 100–115°C. Start at 255°C nozzle and 105°C bed for best results. Avoid drafts or air conditioning near the printer during printing.
Step 3: Enclosure (Optional)
Unlike standard ASA, QTS ASA+ can be printed on open-chamber machines. However, using an enclosure or draft shield will further improve layer adhesion and reduce warping on large prints.
Step 4: Cooling Fan
Use minimal or no part cooling fan (0–30%). Too much cooling causes layer delamination. For bridging and overhangs, a brief burst of cooling is acceptable.
Step 5: Drying (Optional)
QTS ASA+ has low moisture absorption, so drying is usually not required. If stored in high humidity for extended periods, dry at 70°C for 2 hours before printing.
Step 6: Post-Processing
Sand with 120–400 grit sandpaper. Polish with acetone for a glossy finish. Paint with acrylic or oil-based paints. Drill, tap, and glue with standard adhesives or cyanoacrylate (super glue).
Printer Compatibility
QTS ASA+ is compatible with virtually all FDM 3D printers on the market, including open-chamber models. Verified compatibility includes:
Frequently Asked Questions
Q: What is the main difference between QTS ASA+ and standard ASA filament?
A: QTS ASA+ features a proprietary low-moisture formula (<0.3% absorption), which is significantly lower than standard ASA. This means no mandatory pre-drying, easier printing on open-chamber printers, and higher layer adhesion and impact resistance compared to conventional ASA products.
Q: Can I print QTS ASA+ without an enclosure?
A: Yes — this is one of ASA+'s key advantages. The low-moisture formula keeps the material stable in open-air environments. You can achieve excellent results on Bambu Lab, Prusa, Creality, and other open-chamber printers without a dedicated enclosure.
Q: How long will ASA+ parts last outdoors?
A: In direct sunlight environments: 5+ years with no yellowing or embrittlement. In sheltered outdoor environments (shade, partial cover): 7+ years. In harsh UV environments (desert, high altitude): 4–5 years. ASA+ is the top choice for long-term outdoor applications.
Q: Is ASA+ suitable for drone and UAV parts?
A: Absolutely. ASA+ offers an excellent balance of impact resistance (16–20 kJ/m²), UV stability, and printability. It is widely used for drone frames, motor mounts, guards, and structural components where outdoor durability and impact tolerance are critical.
Q: How does ASA+ compare to ABS for outdoor use?
A: ASA+ is significantly superior to ABS for outdoor applications. ABS degrades rapidly under UV exposure — yellowing and becoming brittle within 1–2 years outdoors. ASA+ maintains its color and mechanical properties for 5+ years under the same conditions, making it the preferred replacement for ABS in any outdoor application.
Q: What bed surface works best with ASA+?
A: PEI spring steel sheets deliver the best results. Glass beds with glue stick or hairspray also work well. Avoid cold glass without adhesive — first-layer adhesion will be insufficient. A bed temperature of 100–115°C is recommended for all surfaces.
Safety & Storage
Storage Conditions
Store in a cool, dry place at 15–25°C (59–77°F) with relative humidity below 50%. Keep in the original vacuum-sealed bag or an airtight container with desiccant when not in use.
Printing Safety
Print in a well-ventilated area. ASA+ emits milder fumes than ABS, but ventilation is still recommended. Keep away from children during printing. Avoid touching the hot nozzle or heated bed.
Shelf Life
Unopened vacuum-sealed spools: 24 months from manufacture date. Once opened: use within 6 months for optimal print quality, or store with desiccant in an airtight container.
Why QTS? The Trusted Choice for Professional 3D Printing Materials
Bambu Lab Official Distributor in Taiwan | 15+ Years Industry Experience | 8,000+ Customers | Professional Material R&D
QTS is not only the official Bambu Lab distributor in Taiwan, but also a material science innovator with over 15 years of deep expertise in the 3D printing industry. We combine the trust of an official distributor with the precision of in-house R&D.
| Independent R&D & Innovation | A dedicated material science team developing specialized filaments — including anti-static, high-speed, and enhanced-performance formulas — based on real market demands. |
| Strict Quality Control | Every spool undergoes diameter consistency checks (±0.03mm), color saturation verification, and batch stability testing — not just printable, but reliably durable. |
| Professional Technical Support | Full parameter recommendations and troubleshooting support provided. Whether you are a hobbyist or an industrial user, our team helps you maximize your printer's performance. |
| Official Distributor Guarantee | Factory-level after-sales service and genuine product assurance. Shop with confidence knowing every product is backed by QTS's 15+ year reputation. |
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