TOPFOX, built for the ultimate printing experience
With 20 years of TPU base resin and modification expertise, validated by the TOPFOX lab's extensive testing, we solve the hard problems of TPU printing — no more clogging, color-change failures or inconsistent results across machines. Filament engineered to perform across devices and models.
TPU modification expertise
hardness series
high-speed printing
fully in-house
TPU is hard to print. The root cause is the resin, then the process.
The root cause is the resin
Clogging, stringing and weak layer adhesion are first a resin problem, then a process problem. With 20 years of experience applying imported TPU base resins, the TOPFOX team knows every grade inside out. Only stable resin batches keep downstream coloring and processing under control — eliminating performance drift at the source.
Speed and rebound come from modification
Backed by 20 years of modification expertise and a massive formulation database, we develop printing-grade modified TPU with optimized rheology for smooth high-speed extrusion.
Color is far more than picking a shade
Color-change failures stem from a physical mismatch between the color masterbatch and the TPU base resin. We strictly control their compatibility so that coloring never compromises print performance or toughness.
Consistency, from one spool to many machines
Making one good spool is easy. Making every spool of every batch just as good is the real challenge. Stable base resin, modification and coloring keep performance and color uniform across batches — no repeated tuning, even when running many machines side by side.
Why does the same filament print differently on different printers?
Why does the same printer behave differently across models?
The TOPFOX lab runs extensive testing on this exact question, digging into how machines, models and TPU interact — so our filament prints more forgivingly across devices and models.
Join the test engineer programTOP + FOX, a band of pioneers
On the road of flexible printing filaments, we chose a path less traveled — but one worth taking.
Top-tier
Top materials · top craftsmanship · top experience
Fox
Agile and nimble — soft, high-rebound, fast
TPU is soft, skin-friendly and highly elastic, with abrasion resistance far beyond PLA — yet traditional TPU filament suffers from three core problems: clogging, stringing, and poor interlayer adhesion.
Backed by 20 years of TPU base resin and modification expertise, TOPFOX tackled these issues one by one at the formulation level, delivering flexible, high-rebound TPU in multiple hardness levels.
Making good filament is only the beginning. We invest far more effort validating across models and printers, preparing recommended slicing profiles for users. Because we believe: what you're buying isn't filament — it's the experience.
Founded TOPFOX on 20 years of TPU formulation expertise
Formulation R&D — cracked TPU's three printing challenges
Packaging finalized, validated on 5 printers, Kickstarter launch
Global launch · more fits · more colors
A team obsessed with one material
Our core team has 20 years in polymer engineering, controlling every step from formulation to extrusion.
Core team photo / lab scene
Anonymized — back view / hands close-up, no identifiable faces
20 years of deep expertise
Our core team has 20 years in polymer materials engineering, controlling the full chain from base resin formulation to filament extrusion.
Manufacturing
Two production bases in Shanghai and Dongguan, backed by our parent company's polymer platform — vertical integration from resin to filament.
Raw material advantage
Vertical integration from resin to filament — stable materials and traceable batches for reliable supply.
Compliance you can trust
Direct from the factory, backed by quality, safety and environmental certifications — every purchase with confidence.
National High-Tech Enterprise
ISO 9001
ISO 14001
RoHS
ECO-friendly packaging
Want to verify our TPU yourself?
Five hardness series, from 75A to 95A — request a sample and start printing right away.