← All linesProduct line

FastStable & reliable for everyday printing

Fast line

The TOPFOX standard. Prints at 140mm/s — 3–4× faster than typical 40–60mm/s filament.

140mm/s print speed — 3–4× typical filament
Standard formula, best all-round compatibility
Print difficulty: easy (close to PLA)

Print speed140 mm/s3–4×

Hardness95A / 90A / 85A / 80A

DifficultyEasy ≈ PLA

Which shore hardness?

Same line, same formula — only firmness differs. See each hardness in a real print, then pick by what you're printing.

Everyday functional parts and footwear components — stable output at moderate speed.

95AFirm, strong support

·Structural parts
·Lamp shades
·Protective shells
·Functional supports

Strong support and drop-resistant — closest to rigid

90AFirm-flexible

·General functional parts
·Outsoles
·Phone cases
·Drone guards

Firm in tension, minimal compression set — best compatibility, closest to PLA

85ABalanced

·Seals
·Overmolds
·Uppers
·Cosplay parts

Large-flex bending with excellent rebound — sweet spot between softness and printability

80ASofter, high tactility

·Footwear components
·Cushioning
·Liners

Freely shapeable — use direct drive, steadier feed, slightly slower

Unsure? Start at 95A — dial in first, then go softer.

Recommended print settings

Suggested · pending verification

Starting points you can copy into your slicer.

Nozzle temp220–240 °CStart at 230 °C, tune with a temp tower

Bed temp40–60 °CStart at 40 °C, lower if over-adhesion

Print speed60–140 mm/sFirst layer 10–15 mm/s, keep uniform

RetractionDirect 0.5–1.5 mm @ 20–25 mm/sLess is more — try off first

Cooling fan30–60%Off on first layer, lower for structural

Layer height0.1–0.2 mm

InfillGyroid 10–25%Lower for flexible parts

Suggested starting values — pending TOPFOX material-engineer verification. Always follow the spool label and official slicer profile.

Four common pitfalls, solved

Know the cause before it happens.

Moisture

SYMPTOMIncreased stringing, bubbles/rough surface, nozzle hissing

CAUSETPU absorbs moisture quickly

FIXDry at 70–75 °C for 4 h before printing; seal + desiccant; re-dry after 1–2 days exposed

Stringing

SYMPTOMThin wisps left on travel moves

CAUSEHigh temp / low retraction / moisture / Z-hop

FIXDry first → drop 5 °C → enable Combing → disable Z-hop → add slight retraction; clean with a heat gun

Soft-filament feeding

SYMPTOMExtruder gear clicking, filament wrapping the gear

CAUSEToo much retraction / gear too tight / sudden speed changes

FIXLess retraction (0.5–1.5 mm), loosen the gear, prefer direct drive, keep speed uniform

Layer adhesion

SYMPTOMBreaks along layer lines when bent

CAUSELow temp / strong fan / too fast / moisture

FIXRaise 5–10 °C, fan <30%, slow down, dry

Which line is right for you?

Three lines, three tuning directions — pick what matters most.

Product line comparison
Line	Speed	Hardness	Core goal	Action
Fast (Standard)Current	140 mm/s	95A / 90A / 85A / 80A	Reliable, with speed	You're here
Ultra-Fast (High-Speed)	240 mm/s	95A / 90A / 85A	Maximize print speed	View →
Soft (Flexible)	>40 mm/s	75A / 70A / 65A	Soft & skin-friendly	View →
High-Elastic (Rebound)	120 mm/s	95A / 95A Pro / 95A Pro+	High rebound, deformation-resistant	View →
AMS Edition	140 mm/s	95A / 68D	Bambu AMS compatibility	View →

Speed data is based on TOPFOX lab tests. Actual results depend on the printer, model geometry and slicing parameters.

Specification

Diameter1.75 mm ± 0.03 mm

Net weight1 kg / 250 g (AMS: up to 3 kg)

Nozzle temp220–260 °C

Print difficultyEasy after drying (≈ PLA)

Storage15–30 °C, <30% RH, sealed + desiccant

Drying70–75 °C · 4 h

Spool size20.5 × 20.5 × 7 cm

Downloads

Files coming soon

Print settings PDFPreparing

Color card PDFPreparing

Slicer profilesPreparing

Test basis

Certified data and reports — to be published.

Tensile strength: TBD
Elongation at break: TBD
Rebound rate: TBD
Batch consistency: TBD
Certifications (REACH / RoHS): TBD

FAQ

How to store TPU filament?

· 密封袋/密封盒 + 干燥剂（硅胶） · 湿度 > 40% 的环境建议使用干燥箱打印 · 暴露空气中超过 1–2 天就需要重新干燥 · 远离阳光直射和高温黄金法则：取出打印后立即放回密封袋并封好口。

What is the shelf life of TPU?

· 干燥密封状态：1–2 年没问题 · 暴露潮湿环境：几天就会吸湿到影响打印的程度过期或严重受潮的 TPU 不一定报废——充分干燥（55°C / 6小时）后仍可使用。判断标准：打印时无嘶嘶声、表面无气泡。

Can I mix TPU from different brands?

物理上可以（都是 TPU 基材），但不同品牌的打印参数可能差异较大： · 不建议在同一卷上拼接不同品牌的线材 · 切换品牌时建议重新做温度塔测试 · 同一打印任务中尽量使用同一品牌同一批次

Can TPU prints be post-processed?

· 打磨：不推荐——TPU 太软，砂纸会把表面拉毛 · 喷漆：用柔性漆（flexible paint） · 粘接：TPU 专用胶或火焰处理 + 聚氨酯胶 · 去拉丝：热风枪/打火机快速过一遍（最有效方法） · 涂层：聚氨酯清漆可以增加表面硬度和耐刮性

Is TPU resistant to oil and chemicals?

· 良好抗性：大多数油类、油脂 · 可耐受：弱酸弱碱、汗液、雨水、普通清洁剂 · 不耐受：强酸强碱、某些有机溶剂（如 THF、DMF）日常使用中，TPU 对汗液和雨水的耐受性很好，非常适合穿戴类应用。

Feel it before you commit

Request a Fast line sample and experience the print quality yourself.

← PreviousAMS140 mm/s Next →240 mm/sUltra-Fast