🎯 QTS TPU 85A Flexible Filament - Ultra-Soft Professional-Grade Material
QTS TPU 85A is a professional-grade 3D printing material designed for ultimate softness and elasticity requirements. With a Shore Hardness of 85A, it is the softest option in QTS's flexible material series, providing your creations with excellent extensibility, impact resistance, and shock absorption capabilities.
Made from high-quality Thermoplastic Polyurethane (TPU), this material retains the excellent wear resistance, oil resistance, and tear resistance inherent to TPU materials while achieving new heights in softness. It is ideal for creating objects that require high bending, stretching, or impact absorption.
As a leading Taiwan-based brand, QTS is committed to providing stable quality and reliable performance 3D printing materials. TPU 85A has undergone rigorous quality control and parameter optimization to ensure smooth and stable printing on most FDM/FFF 3D printers, whether using Direct Drive or Bowden extrusion systems, delivering excellent detail and layer bonding strength.
✨ 6 Core Advantages
1️⃣ Ultimate Softness & High Elasticity (Shore 85A)
Provides exceptional soft touch and elongation at break of over 600%, capable of withstanding repeated bending, compression, and stretching without deformation or breaking. This ultimate softness makes it ideal for wearables, medical devices, and flexible seals. Whether it's a comfortable smartwatch band or a precisely fitting orthotic insole, TPU 85A delivers perfect softness and comfort.
2️⃣ Excellent Impact Resistance & Shock Absorption
Superior energy absorption characteristics effectively buffer external impacts, making it ideal for protective components and shock-absorbing structures. TPU 85A's high elasticity enables it to absorb and dissipate impact forces, protecting internal components from damage. Particularly suitable for phone cases, drone landing gear pads, precision instrument bumpers, and more.
3️⃣ Excellent Wear & Tear Resistance
Offers good wear resistance and anti-tearing performance, ensuring durability and longevity of end-use parts. TPU 85A achieves a tear strength of 85 N/mm, capable of withstanding long-term friction and pulling. This makes it particularly suitable for parts requiring extended use, such as sports bands and VR device face cushions.
4️⃣ Smooth & Stable Printing
Optimized material formula with excellent flowability significantly reduces the risk of nozzle clogging, warping, or stringing during printing. TPU 85A's superior flowability enables stable printing at 20-40 mm/s speeds, delivering satisfactory results even for beginners.
5️⃣ Taiwan-Made, Quality Assured
From raw material selection to production processes, everything is completed in Taiwan, ensuring every spool meets the highest quality standards. QTS brings 15+ years of 3D printing material manufacturing experience, serving over 8000+ satisfied customers with recognized quality and reliability.
6️⃣ Multi-Extrusion System Compatible
Optimized material formula enables smooth and stable printing on most FDM/FFF 3D printers. Whether using Direct Drive or Bowden extrusion systems, TPU 85A delivers excellent detail and layer bonding strength. Particularly with Direct Drive systems, it achieves the most stable and reliable printing results.
🎨 Application Fields
QTS TPU 85A's ultimate softness makes it shine in multiple fields:
✦ Wearable Devices
Such as smartwatch bands, sports bracelets, and VR device face cushions, providing comfortable skin-friendly wearing experience. TPU 85A's softness and durability make it ideal for wearable manufacturing, offering long-term comfort for extended wear.
✦ Medical & Assistive Devices
Can be used for custom orthotic insoles, prosthetic cushioning liners, and medical model soft tissue simulation. TPU 85A's biocompatibility and softness make it particularly suitable for medical applications, providing precise patient fit and comfortable user experience.
✦ Shock Absorption & Cushioning Parts
Such as phone protective cases, drone landing gear pads, precision instrument bumpers, and mechanical equipment vibration dampers. TPU 85A's excellent impact resistance effectively protects internal components and extends equipment lifespan.
✦ Flexible Seals & Gaskets
Can create custom sealing rings, gaskets, or dust covers with excellent air-tightness and water-tightness. TPU 85A's softness and durability enable reliable sealing suitable for various industrial applications.
✦ Realistic Models & Prototypes
During product design verification stages, can be used to create prototypes requiring soft touch or elastic behavior simulation, such as buttons and grip covers. TPU 85A helps designers verify product ergonomics and user experience.
📋 Product Specification Table
| Specification Item | Value | Test Standard |
| Hardness | Shore 85A | ASTM D2240 |
| Density | 1.2 g/cm³ | ASTM D792 |
| 100% Modulus | 7 Mpa | ASTM D412 |
| Elongation at Break | >600% | ASTM D412 |
| Tensile Strength | 30 Mpa | ASTM D412 |
| Tear Strength | 85 N/mm | ASTM D624 |
| Glass Transition Temperature | -35 °C | DSC |
| Filament Diameter | 1.75mm (±0.03mm) | - |
| Net Weight | 1kg / Spool | - |
| Spool Dimensions | 200mm (OD) x 56mm (ID) x 65mm (W) | - |
| Made In | Taiwan | - |
| Shelf Life | 18 months | - |
📌 Note: Above values are typical laboratory values for reference only. Actual performance may vary depending on printing conditions and model structure.
🖨️ Recommended Print Parameters
| Parameter Item | Recommended Value | Notes |
| Nozzle Temperature | 200 – 230 °C | Adjust based on printer and environmental temperature. Recommend starting from 210°C |
| Heated Bed Temperature | 60 – 80 °C | Can apply thin layer of glue stick to enhance adhesion |
| Print Speed | 20 – 40 mm/s | For softer materials, recommend slower speeds to ensure stable extrusion |
| Retraction | Speed < 25 mm/s
Distance < 3 mm | Recommend disabling or using low retraction speed and short distance to prevent material stretching or jamming in extruder |
| Cooling Fan | 50-100% | Adjust based on model complexity. Generally recommend 70-100% |
| Recommended Nozzle | ≥ 0.4 mm
Recommend 0.6 mm | For better flowability, recommend using 0.6 mm nozzle |
| Infill Density | 10-20% | TPU material itself is elastic; higher infill density reduces elasticity effect |
| Layer Height | 0.2-0.3 mm | Recommend using larger layer height to improve printing speed and stability |
⚠️ Important Notes
1. Material Drying (Essential)
TPU material has high moisture absorption. If filament gets wet, printing will produce crackling sounds, surface bubbles, or severe stringing.
Recommend drying filament at 55–60°C for 4–6 hours before each use to achieve optimal printing quality.
2. Extrusion System Selection
While this material is optimized for most extrusion systems, using a Direct Drive extruder typically achieves more stable and reliable printing results compared to Bowden extruders.
If using Bowden extrusion system, recommend reducing print speed to 20-30 mm/s and using shorter retraction distance.
3. Storage Method
When not in use, store filament in dry sealed bags or dry boxes with desiccant.
Recommend storage environment humidity below 20% RH.
Proper storage extends filament shelf life and ensures optimal printing results each time.
❓ Frequently Asked Questions (FAQ)
Q1: What's the difference between TPU 85A and other TPU hardness levels (like 95A)? TPU 85A is the softest option in QTS's flexible material series, providing ultimate soft touch and elongation at break exceeding 600%. Compared to TPU 95A which has higher hardness and better dimensional stability, TPU 85A offers superior softness and elasticity. Choose TPU 85A for extreme softness and elasticity needs; choose TPU 95A for better dimensional stability.
Q2: Can TPU 85A be used for phone protective cases? Absolutely! TPU 85A's excellent impact resistance and softness make it ideal for phone case manufacturing. Its elongation at break exceeding 600% effectively absorbs impact forces, protecting phones from damage. Meanwhile, its soft touch provides comfortable grip feel. Many professional phone case manufacturers use TPU materials.
Q3: Why does my TPU 85A produce crackling sounds during printing? Crackling sounds typically indicate moisture absorption. TPU material has high moisture absorption; when it absorbs water, it produces crackling during printing and causes surface bubbles in finished parts. Solution: dry filament at 55-60°C for 4-6 hours before use. Also ensure unused filament is stored in dry sealed bags or dry boxes.
Q4: Can TPU 85A be printed on Bowden extrusion systems? Yes, but Direct Drive systems are recommended for best results. If you only have Bowden extrusion system, recommend these adjustments: reduce print speed to 20-30 mm/s, use shorter retraction distance (< 3 mm) and lower retraction speed (< 25 mm/s), use 0.6 mm or larger nozzle. These adjustments help achieve more stable printing on Bowden systems.
Q5: Does TPU 85A finished product require post-processing? TPU 85A finished products typically don't require special post-processing. To improve surface quality, you can gently sand the surface with fine sandpaper. To enhance mechanical properties, you can anneal the finished product by heating in 60-80°C oven for 1-2 hours. Avoid chemical solvents as some may dissolve or soften TPU material.
Q6: Can TPU 85A finished products be exposed to sunlight long-term? Prolonged sunlight exposure may gradually age and embrittle TPU material. If your application requires long-term sunlight exposure, consider using QTS ASA or QTS High Temp PLA with better weather resistance. If TPU 85A must be used, recommend regularly inspecting product condition and replacing as needed.
🏆 Why Choose QTS TPU 85A?
- ✅ Ultimate Softness: Elongation at break exceeding 600%, providing unparalleled soft touch
- ✅ Superior Quality: Taiwanese brand, 15+ years manufacturing experience, 8000+ satisfied customers
- ✅ Stable Printing: Optimized material formula enables stable printing on most FDM/FFF printers
- ✅ Multi-Functional: Suitable for wearables, medical devices, shock-absorbing parts, seals, and more
- ✅ Professional Support: Detailed technical guidance and customer support
- ✅ Cost-Effective: Excellent value for money, economical choice for elastic parts manufacturing
📞 Contact Us
If you have any questions about QTS TPU 85A or need technical support, please feel free to contact our professional team. We're happy to help!
