TOPFOX
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SoftSkin-contact & wearable parts

Soft line

Built for wearables — skin-friendly and soft. Super-soft filaments are normally hard to print; TOPFOX Soft is modified to print easier and better than conventional ones.

  • Ultra-soft and skin-friendly — wearables first (braces, liners)
  • Modified formula prints easier and better than conventional soft filament
  • Print difficulty: easy (close to PLA)
Print speed>40 mm/s
Hardness75A / 70A / 65A
DifficultyEasy ≈ PLA
Soft filament spool

Which shore hardness?

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

Orthotics, braces, liners and other skin-contact, wearable products.

Orthotics, braces, liners and other skin-contact, wearable products.

3 hardness options — same line, pick your firmness

75A70A65A
Diameter1.75 / 2.85 mm
Nozzle0.6 / 0.8 mm

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
LineSpeedHardnessCore goalAction
Fast (Standard)140 mm/s95A / 90A / 85A / 80AReliable, with speedView →
Ultra-Fast (High-Speed)240 mm/s95A / 90A / 85AMaximize print speedView →
Soft (Flexible)Current>40 mm/s75A / 70A / 65ASoft & skin-friendlyYou're here
High-Elastic (Rebound)120 mm/s95A / 95A Pro / 95A Pro+High rebound, deformation-resistantView →
AMS Edition140 mm/s95A / 68DBambu AMS compatibilityView →

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 Soft line sample and experience the print quality yourself.

Contact us
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