QTS Flex 85A Tough Elastic Resin (Black) — Flex series performance king. Shore 85A comparable to TPU engineering plastic, tensile strength 8~12 MPa, 45~55% elongation, ultra-low viscosity 150~250 cps (Flex series lowest). Extreme wear resistance, tough yet flexible. Perfect for industrial gears .

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QTS Flex 85A Tough Elastic Resin Black | Shore 85A TPU-Like | Industrial Gear/Caster | Made in Taiwan | 405nm

🏆 QTS Technology — Taiwan-Based R&D & Manufacturing

30+Years Chemical Background

15+Years 3D Printing Experience

8000+Taiwan Customers

100%Made in Taiwan

QTS Technology brings 30+ years of chemical R&D expertise to 3D printing materials.
All resins are developed and manufactured in Taiwan with strict quality control, trusted by 8000+ customers.

QTS Flex 85A Tough Elastic Resin (Black)

Flex Series Performance King × TPU-Like × Extreme Wear Resistance × Industrial Gear Choice

Shore 85A (TPU-Like) 8~12 MPa Tensile 45~55% Elongation 150~250 cps Ultra-Low Viscosity Matte Black Made in Taiwan 405nm Compatible

85A Shore Hardness (TPU-Like)

Flex series highest, comparable to TPU engineering plastic

8~12 MPa Tensile Strength

Engineering-grade strength for extreme loads

150~250 cps Viscosity (Lowest)

Flex series lowest viscosity — easiest to process

🔍 QTS Flex Series Selection Guide — Find Your Perfect Hardness

Flex 8A

Ultra-Soft Silicone

700% elongation

25A

Flex 25A

Soft & Resilient

270~340%

46A

Flex 46A

Clear Elastic

120~160%

57A

Flex 57A

TPU-Like Clear

>80% + 56 J/m

68A

Flex 68A

Hard Rubber Black

90~120% + 15 MPa

★ Flex 85A ← You Are Here ★
Shore 85A × TPU-Like × Extreme Wear Resistance × Industrial Gear × 8~12 MPa × 45~55% Elongation

Flex 85A is the highest hardness, most TPU-like elastic resin in the series, designed for applications requiring extreme wear resistance and high strength

✨ Six Core Advantages

🏆

TPU-Like Performance

Shore 85A hardness with mechanical performance and durability rivaling popular TPU engineering plastics. Print functional parts with TPU-level strength at photopolymer precision — no FDM layer lines.

⚙️

Extreme Wear Resistance — Industrial Gear Choice

Shore 85A hardness delivers unmatched wear and cut resistance, withstanding high-intensity friction, rolling, and impact long-term. Ideal for industrial gears, high-wear casters, jigs, and fixtures.

🔄

Tough Yet Flexible — Perfect Balance

45~55% elongation ensures parts absorb energy without brittle fracture under extreme impact — achieving the perfect "hard yet flexible" mechanical characteristic combining hardness and toughness.

💧

Ultra-Low Viscosity — 150~250 cps (Flex Series Lowest)

The lowest viscosity in the Flex series ensures fast resin flow and fine detail filling, significantly improving print success rates and making post-processing cleaning simpler and more efficient.

🖤

Professional Matte Black Finish

Professional matte black appearance makes prototypes look closer to final products, suitable for direct use as functional parts. No additional painting required — perfect for industrial and automotive aesthetics.

🇹🇼

Taiwan R&D & Manufacturing

100% Taiwan-developed and manufactured with strict quality control. QTS Technology's 30+ years of chemical expertise, trusted by 8000+ customers.

🎯 Six Core Application Areas

⚙️

Industrial Gears & Drive Components

Gear, bushing, and drive component prototypes and small-batch production. Shore 85A extreme wear resistance and photopolymer precision ensure accurate gear tooth profiles for pre-mold design validation.

🏭

Jigs, Fixtures & Positioning Blocks

Production-line jigs, fixtures, and positioning blocks. High hardness and wear resistance ensure long-term dimensional stability. Create complex geometric tooling at photopolymer precision, dramatically reducing lead time.

🛞

High-Wear Casters & Wheels

High-wear industrial casters, inline skate wheels, and skateboard wheels. Extreme wear resistance ensures long-term durability; black finish suits professional sports equipment aesthetics.

🚗

Automotive & Mechanical Parts

Durable clips, wear pads, and high-strength buffers for engine compartments. TPU-like strength and wear resistance for accurate automotive part functional validation before tooling investment.

🏋️

Sports & Outdoor Equipment

Wear-resistant components for inline skates, golf equipment, and sporting goods. Shore 85A hardness and wear resistance ensure stability under intense use; black finish suits professional design aesthetics.

🔬

TPU/Nylon Functional Prototypes

Prototypes for any application requiring hard TPU or Nylon performance simulation. Validate TPU/Nylon part strength, wear resistance, and functionality at photopolymer precision before expensive tooling.

📊 Complete Technical Specifications

Photopolymer Resin Basic Properties (Liquid Material)

Test Item	Value	Test Method
Appearance	Flowable Liquid	Visual
Color	Black	Visual
Viscosity @25°C	150 ~ 250 cps (Flex Series Lowest)	Viscometer
Wavelength	395 ~ 405 nm	—
Volume	500 g	—

Mechanical Properties After Curing

Test Item	Value	Test Method
Shore Hardness A	85 A (Comparable to TPU Engineering Plastic)	ASTM D2240
Tensile Strength	8 ~ 12 MPa	ASTM D638
Elongation at Break	45 ~ 55 % (Tough yet flexible)	ASTM D638
Print Technology	LCD / DLP / SLA	—

📌 Flex 85A vs TPU Performance Comparison:
Shore 85A hardness closely matches TPU engineering plastic (typically Shore 80~95A), and tensile strength of 8~12 MPa falls within TPU's typical range (5~50 MPa). Flex 85A delivers near-TPU mechanical performance at photopolymer precision — the high-accuracy alternative to FDM TPU printing.

⚙️ Recommended Exposure Parameters

⚠️ Flex 85A Note: Although higher hardness, still an elastic resin — over-exposure reduces elasticity. Black resin has slightly lower light penetration — ensure sufficient bottom layer exposure. Start from the lower end of the range.

Printer Model	Screen Type	Bottom Exposure	Normal Layer Exposure	Layer Height
Phrozen Make	Color-LCD	35 ~ 45 sec	9 ~ 12 sec	50 μm
Phrozen Sonic mini	Mono-LCD	25 ~ 35 sec	5 ~ 6 sec	50 μm
Miicraft 125	DLP	9 ~ 12 sec	1.0 ~ 1.3 sec	50 μm

📋 Usage Steps

Shake the Resin

Shake thoroughly before use. Flex 85A has the lowest viscosity in the Flex series (150~250 cps) — excellent flowability at room temperature, no warming required.

Set Print Parameters

Use recommended exposure parameters above. Although higher hardness, still avoid over-exposure. Black resin has slightly lower light penetration — ensure adequate bottom layer exposure time.

Remove Print

Flex 85A's higher hardness makes removal easier. Use a thin spatula to assist. For precision parts like gears, handle carefully to avoid damaging tooth profiles.

Wash

Wash with 95% Alcohol or IPA or dedicated cleaning solution, gently agitate for 1~2 minutes. Flex 85A's ultra-low viscosity (150~250 cps) makes cleaning easier and more efficient — residual resin is removed more readily.

Post-Cure (Required)

Post-cure using a UV curing station (365~405nm) for 10~60 minutes (adjust based on model thickness). Allow to cool to room temperature before performance testing. Note: Even at higher hardness, excessive post-curing still affects elasticity — keep within recommended range.

📊 Flex 85A vs FDM TPU vs Traditional Molding vs Standard Elastic Resin

Comparison	QTS Flex 85A	FDM TPU Printing	Traditional Molding	Standard Elastic Resin
Hardness	Shore 85A (TPU-Like) ⭐⭐⭐	Shore 80~95A	Customizable	Shore 20~50A
Print Precision	Ultra-High (Photopolymer) ⭐⭐⭐	Low (visible layer lines)	High	Ultra-High (Photopolymer)
Wear Resistance	Extreme ✅	Average	Depends on material	Average
Tooling Cost	Zero ✅	Zero	Tens of thousands	Zero
Lead Time	Hours ✅	Hours	Weeks to months	Hours
Fine Detail	Excellent (gear-ready) ✅	Poor (layer lines)	High	Excellent
Taiwan Local Support	✅ QTS Professional	Depends on brand	Depends on supplier	Depends on brand

❓ Frequently Asked Questions

Q: Does Flex 85A really compare to TPU? What are the differences?

A: Flex 85A's Shore 85A hardness and 8~12 MPa tensile strength are indeed very close to typical TPU engineering plastic specifications. The key advantage is photopolymer precision enabling fine geometric structures impossible with FDM TPU (precision gears, small clips). The main difference is elongation (45~55%) is slightly lower than high-elasticity TPU, but sufficient for most industrial applications.

Q: Can it be used for functional industrial gears?

A: Yes, Flex 85A is ideal for industrial gear prototyping and small-batch production. Shore 85A extreme wear resistance combined with photopolymer precision enables accurate gear tooth profiles, allowing pre-mold design validation and significantly reducing tooling risk.

Q: What's the difference between Flex 85A and Flex 68A?

A: Flex 85A (Shore 85A) is harder and closer to TPU engineering plastic than Flex 68A (Shore 68A). Flex 85A has superior wear resistance, better for gears and fixtures requiring extreme wear resistance; elongation (45~55%) is slightly lower than Flex 68A (90~120%) but still provides adequate elasticity. Choose Flex 85A for maximum wear resistance and closest-to-TPU performance; choose Flex 68A for higher elasticity and rebound.

Q: Why does Flex 85A have the lowest viscosity? What are the benefits?

A: Flex 85A's viscosity (150~250 cps) is the lowest in the Flex series, bringing multiple benefits: better resin flow for quickly filling fine gear tooth gaps and complex structures; higher print success rates; easier post-processing cleaning with residual resin removed more readily.

Q: Is it suitable for automotive part functional validation?

A: Absolutely. Flex 85A's TPU-like strength and wear resistance make it ideal for automotive part functional prototyping — engine compartment clips, wear pads, buffer blocks — allowing accurate functional validation before expensive tooling investment.

Q: Which 3D printers is this resin compatible with?

A: QTS Flex 85A is compatible with all 405nm light source LCD/DLP/SLA 3D printers, including Phrozen, Anycubic, Elegoo, Creality, FlashForge, eSUN, Miicraft, and other mainstream brands.

Q: What are the storage and disposal requirements?

A: Store in a cool, dry location (15~35°C), away from direct sunlight. Seal tightly after each use. Filter used resin before storing separately. Never pour liquid resin directly down the drain — fully cure to solid state first, then recycle as general solid waste. Always wear gloves, safety goggles, and protective clothing during operation.

🏆 Why Choose QTS Technology?

🧪 Taiwan R&D & Manufacturing

QTS brings 30+ years of chemical expertise. All resins are developed and manufactured in Taiwan with consistent batch quality and strict quality control.

🔧 Professional Technical Support

Complete printing parameter guidance and troubleshooting to help you achieve optimal industrial performance and maximize material capabilities.

🖨️ Universal Printer Compatibility

Compatible with all 405nm printers including Phrozen, Anycubic, Elegoo, Creality, FlashForge, and Miicraft.

🛡️ Trusted by 8000+ Customers

Long-term trust from 8000+ Taiwan customers spanning designers, engineers, research institutions, and manufacturers across industries.

🚀 Experience Flex 85A — SLA Precision × TPU Engineering Strength!

Made in Taiwan × Shore 85A TPU-Like × Extreme Wear Resistance × Industrial Gear Choice

📧 Technical Support: info@qts.tw ｜ 🌐 Official Store: shop.qts.tw

Print Parameters