From “Printable” to “Manufacturable”: Light-Curing Resins Continuously Breakthrough Performance and Application Boundaries

From model printing to industrial manufacturing, from creative design to medical dentistry, and further to flexible consumer goods and smart manufacturing, an increasing number of industries are beginning to adopt light-curing 3D printing as a production tool. Driving this transformation is not only the advancement of equipment technology but also the continuous breakthroughs in material performance.

As one of the earliest enterprises in China to lay out light-curing materials, eSUN has always regarded material innovation as a crucial development direction. Looking back at the journey over the years, it is not difficult to find that our focus has never been merely on launching more products, but on continuously responding to the ever-changing needs of the industry.

eSUN Resin Material System

01 Starting from Bio-based Materials to Improve the Light-Curing Printing Experience

In the early days, light-curing resins generally suffered from problems such as strong odors, which posed challenges to the operating environment and user experience, and also raised the entry threshold for desktop light-curing printing.

Relying on the company’s technical accumulation in the field of biomaterials, eSUN independently synthesized bio-based oligomers and launched the first domestic bio-based light-curing resin—Bio-based Resin (eResin-PLA) in 2016. By improving the formula design from the source, this material effectively reduces irritating odors while maintaining molding precision. Furthermore, by replacing petroleum-based raw materials with bio-based raw materials, the product’s greenhouse gas emissions are reduced by 40%, opening a “new eco-friendly era” for light-curing 3D printing.

In 2020, the eSUN Bio-based High-Precision Resin was introduced. Currently, this material has passed three biocompatibility certifications.

Details of models printed with Bio-based High-Precision Resin

02 Matching Market Demands and Extending to Professional and Engineering Applications

As 3D printing technology deepens its applications in fields such as medical and industrial sectors that require higher precision and reliability, materials are beginning to bear increasingly more functional requirements: higher strength, higher toughness, more stable dimensional accuracy, better durability, and the strict requirements for biocompatibility in medical scenarios.

Centered on these needs, eSUN continues to perfect its layout of engineering-grade and professional application resins.

In dental medical applications, the precision and biosafety of auxiliary surgical guides are rigid demands of the industry. Conventional guide materials cannot withstand high-temperature steam sterilization and pose compliance risks regarding cytotoxicity. To this end, eSUN developed the Surgical Guide Resin (SG100). This material features high transparency and low water absorption, and supports 134℃ high-temperature and high-pressure steam sterilization. From a technical perspective, we have effectively overcome the pain points of sterilization and biosafety. Currently, this product has passed 5 biocompatibility tests, obtained EU CE Class I certification and US FDA Class I registration, and has assisted multiple domestic customers in successfully completing Class II medical device certifications, truly realizing the compliant implementation of medical-grade materials.

In the field of industrial manufacturing, it is often difficult to balance the “high strength” and “high toughness” of resin materials. In response to this industry pain point, the eSUN R&D team started with material modification and, utilizing IPN technology, launched the High-Hardness and High-Toughness Resin. This material effectively balances mechanical properties, achieving high strength, high hardness, and high toughness. It can be tapped and is impact-resistant, and is currently applied on a large scale in industrial manufacturing.

03 Building a Smart Manufacturing Ecology and Providing Customized Industry Application Solutions

In recent years, light-curing 3D printing has begun to enter more terminal industries such as footwear, consumer electronics, sports equipment, and robotics. New application scenarios have brought new challenges.

For a long time, elastomer 3D printing has been constrained by three major bottlenecks. On the material side, the mainstream “two-component” systems on the market require manual proportioning, which presents problems such as cumbersome operations, short pot life, and low material utilization rates, making it difficult to adapt to continuous production needs. On the equipment side, bottom-up DLP systems are significantly affected by separation forces. When printing thin-walled or lattice structures, they are prone to deformation and have low success rates; coupled with complex supports and cumbersome post-processing, the comprehensive manufacturing costs remain high. In the direction of lattice design, there are also pain points such as interface transition and stress concentration, resin evacuation and cleaning difficulties, release forces causing damage to ultra-fine struts, and technical efficiency challenges under mass customization.

In 2025, eSUN launched the FlexOne High-Performance Single-Component Dual-Curing Elastic Resin. Through a single-component design, this product eliminates the cumbersome mixing and proportioning process of traditional two-component materials, and achieves a new leap in the tensile strength and bending resistance of printed parts.

Meanwhile, iSUN3D, a sub-brand of eSUN, further integrates materials, equipment, software, processes, and technical services to form flexible and elastic 3D printing industry solutions. Currently, this solution has been applied in multiple fields such as 3D printed shoes, consumer electronics, sports equipment, and humanoid robots, helping customers achieve rapid implementation from design verification to large-scale manufacturing.

Light-curing 3D printing is accelerating its stride toward professional manufacturing, and the role of materials is constantly changing. In the future, eSUN will continue to advance material innovation centered on high performance, high reliability, and industrialized applications, and work together with equipment manufacturers, end customers, and industry partners to promote light-curing 3D printing technology into broader professional application scenarios.