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eSUN

MaterialsShenzhen, ChinaFounded 2002· One of 1000 Materials companies tracked by AMPulse

A global leader in bio-materials and 3D printing, specializing in the research, production, and sale of high-quality filaments, resins, and biodegradable polymers like PLA and PCL.

CEO / Founder
Yang Yihu (Kevin Yang)
Team Size
501-1000
Stage
Public
Total Funding
$15.0M
Latest Round
Strategic Investment
Key Investors
SCGC (深创投), Dongxing Securities

Technology & Products

Key Products

Filaments: PLA+/PLA-HS (PLA-HF high-speed to ~1000mm/s), PLA-Coffee, PLA-Matte, ABS+ (2026 upgrade), PETG-ESD, PETG UV color-change, TPU-95A, CF composites (PETG-CF, PA-CF); Resins: W100 water-washable, DM100 dental, Hard-Tough, dental FDA line; Particles (PLA/PETG/TPU/PA-CF); accessories eBOX/eVacuum/eSpool; iSUN3D medical/orthotics & robot applications

Technical position · AMPulse analysis

Maintains a first-mover advantage as the primary drafting unit for China's national standards for PLA 3D printing consumables; holds the world's first patent for bio-based photopolymer resins.

Patent position

eSUN filed 5 patent families in 2022-2024, down from 9 in 2019-2021, a 44% drop even as tracked AM filings in the same patent offices rose 8%, signaling a notable slowdown. Its 30 total families trail SUNLU's 47 and Formlabs' 114, while slightly ahead of Polymaker's 28. AMPulse analysis

Filing momentum
5 families filed 2022–2024, 9 in 2019–2021 (-44%); all tracked AM filings in the same offices +8%
Filed in
CN 93%WO 7%
Named competitors, AM patent families
Polymaker 28SUNLU 47Formlabs 114

30 AM patent families in total. Recent years are still being published, so read a filing change against the same-office figure.

Differentiation

Value Proposition

Delivers a 'Green' closed-loop ecosystem by vertically integrating the synthesis, modification, application, and recycling of bio-based materials, offering professional-grade performance at a competitive cost.

How They Differentiate

Vertical integration of the 'Green' PLA closed-loop ecosystem (synthesis, modification, and chemical recycling) paired with a massive SKU range that spans consumer FDM, industrial resins, and medical-grade orthotics.

Market & Competition

Target Customers

Consumer-grade 3D printing enthusiasts (makers), educational institutions, industrial manufacturing firms, dental labs, and medical rehabilitation centers.

Industry Verticals

Additive Manufacturing, Healthcare & Medical (Orthotics, Dentistry, Implants), Education & Research, Industrial Design & Prototyping, Agriculture (Biodegradable products), Consumer Electronics & Wearables

Competitors

Polymaker; Hatchbox; Sunlu; Formlabs

Growth & Milestones

Growth Metrics

2025 full-year revenue RMB 712M (+31.05% YoY); net profit RMB 18.88M (-21.91% YoY, sales/marketing investment for share). 3D printing materials RMB 640M (+40.25%), ~89.8% of revenue. Revenue path 2023–2025: 4.19→5.44→7.12亿. R&D RMB 23.4M; ~566 employees (94 R&D, 16.6%). National 'Little Giant'.

Major Milestones

Founded in 2002 focusing on biomaterials, Listed on NEEQ (836514) April 2016, Lead drafter ISO 5425:2023 PLA filament standard, iSUN3D medical footwear system 2020; Vietnam manufacturing 2019, 2025 revenue RMB 712M; 3D printing ~90% of sales, Dec 2025: restarted Beijing Stock Exchange (北交所) IPO tutoring with Shenwan Hongyuan; 2 tutoring phases completed by Jul 2026, 2025–2026: Thailand subsidiary ESUN INNOVATION (THAILAND); plan to fully acquire Vietnam CLOVER, 2026: PLA-Coffee (Yum co-dev) at CISCE; ABS+/PETG-UV product upgrades; humanoid-robot materials push

Notable Customers

World Robot Olympiad (WRO); Bambulab users; Maker community; Clinical Orthopedic Centers

https://www.esun3d.com

Recent coverage of eSUN

AM patents

AM-relevant patents linked to this company.

Patents
30
Granted
7
Families
30

Leading domains: process (30), material (17), application (3)

Filings by year: 2026: 4 · 2025: 5 · 2024: 4 · 2023: 1 · 2021: 6 · 2020: 2

  1. CLEANING METHOD AND CLEANING LINE FOR NOZZLE OF FDM-3D PRINTER2016019719 · WO
  2. Drop-resistant 3D printing photocurable resin and preparation method thereof109810228 · CN
  3. A method for preparing high-toughness medical 3D printing materials117719139 · CN
  4. Controllable lightweight foaming material for FDM printing and its preparation method and application113563627 · CN
  5. A preparation method of medical light-cured 3D printing resin117986435 · CN

Funding rounds

  • Strategic InvestmentUndisclosed2023-12Lead: Shenzhen Capital Group · Source: Web
  • Post-IPO EquityUndisclosed2021-04Lead: N/A · Source: CSRC
  • Public ListingUndisclosed2016-04Lead: N/A · Source: NEEQ Filings
  • Series A¥20.0M2014-06Lead: Shenzhen Capital Group · Source: Web

Why this company matters

AMPulse analysis, not a company disclosure

eSUN differentiates itself from other filament suppliers through its 'Green Closed-Loop' PLA industrial chain. The company synthesizes, modifies, applies, and chemically recycles bio-based polymers, turning waste PLA back into refined-grade lactic acid. This vertical integration spans from raw material production to finished consumables, giving it cost and sustainability advantages over competitors like Polymaker and Sunlu that rely on external resin suppliers.

The company's core technologies cover polymer material extrusion (MEX) and vat photopolymerization (VPP-SLA). Its product range includes the W200 water-washable resin, PETG-ESD for electrostatic discharge applications, and high-speed filaments optimized for fast FDM printers. eSUN also holds what it describes as the world's first patent for bio-based photopolymer resins and served as the primary drafting unit for China's national standards on PLA 3D printing consumables.

eSUN targets a broad customer base: consumer makers, educational institutions, industrial manufacturers, dental labs, and medical rehabilitation centers. Notable partners include the World Robot Olympiad and Bambu Lab users. In healthcare, the company launched the iSUN3D customized footwear system in 2020 for orthopedic applications. Its global distribution network spans over 100 countries through platforms like Amazon and Alibaba.

A key strategic moat is eSUN's ability to chemically recycle PLA, which few competitors can do at scale. However, the company faces competitive pressure from lower-cost generic filaments and from Formlabs in the resin segment. Its listing on China's NEEQ board and recognition as a national 'Little Giant' enterprise signal institutional credibility, but the $15 million in disclosed funding is modest relative to global peers.