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eSUN Redefine the Photosensive Resin – Launched the First ever Bio-based Photosensive Resin




With the moving of time, the 3D printing industry is in a thriving development, and the types of equipment and materials for 3D printing are also in a booming improvement. According to the different forming technologies, the major categories can be divided into FDM, DLP, SLA, SLS and etc.

“3D printing industry flourished as the time goes by, the technology of device and and materials advances very fast. The modelling technology can be categorized into FDM, DLP,SLA, SLS etc.”


Among them, the light cure technology employs the photosensitive resin as a material is the most mature part of the 3D printing technology, and the molded product has the highest molding accuracy and molding speed, as well as the smooth surface quality. Now, it has been widely applied into different areas.


‘FDM is the mainstream in the market at present, but for those who want to improve the accuracy of print products, the prints by FDM technology are still yet to reach the ideal result,’ said from eSUN’s project manager Su Zhu. The speed of melting deposition is also slower than that of light cure technology, so customers can choose LCD/DLP and other light cure technologies that have higher molding accuracy and very fast molding speeds. The surface of printing works are more smooth and do not have to polishing. The matched filaments are also safer and environmentally friendly.



Light-cured printing’s accuracy is much higher than FDM printing.


eSUN has developed the bio-based environmental photosensitive resin : eResin-PLA.

When it comes to photosensitive resins, the professional's response is that this is the main consumable for LCD/DLP/SLA technology. Its molding process has a high degree of automation, a good quality of the manufacturing prototype surface, high dimensional accuracy and can achieve a relatively precise size; the printing state is liquid state, can easily achieve complex geometric lines, hollow and other designs, the process is relatively simple, at the same time It also reduces the pollution to the environment. These characteristics make the photosensitive resin material widely popular among the makers. However, in the past, photosensitive resins were reviled by odors and were not environmentally friendly, resulting in poor customer experience.



The latest product on the market, the bio-based environmental-friendly photosensitive resin eResin-PLA is newly developed by eSUN, has perfectly solved the past weakness of the resin. eResin-PLA redefines the innovation of photosensitive resins based on PLA-based polyols. It is the world's first bio-based, safe and environmentally friendly; high precision printing, and good hardness, scratch resistance; hydrophobicity, dry surface, not easy to absorb moisture .




Application Fields:

This product has the strength and toughness of common materials, three colors of red, yellow, and green, and high surface quality. It is the preferred material for craftsmanship, model/mold manufacturing, functional original parts production, etc. It can meet the needs of high precision and high strength.




Supporting LCD printers with built-in upgrading new light source; open structure and chute, automatic leveling; high precision, high speed, and combined with cost-effective. DLP printer adopts DLP digital light processing system with LED light source industrial grade light machine; printing dot matrix is intensive,  guarantee 50,000 hours life.




Continuous creation, researching and developing three special photosensitive resin

With the wide application and demands of 3D printing technology, industry-related technologies are gradually innovating. More and more photosensitive resins are used for models with higher precision and surface requirements and more complex design products.

eSUN’s photosensitive resin has been well-designed. Different materials meet different customer’s needs and industry requirements for material properties. Apart from eResin-PLA, a bio-based environmentally friendly photosensitive resin, it also independently develops three different types of photosensitive resins, namedJewelry casting photosensitive resin, Dental casting photosensitive resin and Non-casting general photosensitive resin.


Jewelry casting photosensitive resin 


Application Fields:

As we all known, the production of jewellery models requires very high level towards detail, the plastics cannot meet the surface requirements, but the use of SLS technology is expensive, which is a heavy burden for jewellery companies. For this dilemma, LCD/DLP technology is an excellent choice. The material is photosensitive resin. The printed jewelry model has a great surface finish and does not require time-consuming on post-processing.

eSUN's jewel-casting photosensitive resin is suitable for making jewellery models. It has high-definition, smooth surface.





Dental casting photosensitive resin 



Application Fields:

Medical products are highly demanding in terms of precision and appearance quality. There is no exception in the field of dentistry. Today, among the five mainstream 3D printing technologies, the application of light curing technology in the dental field enjoyed the most high utilization rate.

Usually dentists use light-curing techniques to make products such as dental models, and the determining on their quality is rely on the chosen material—photosensitive resin. eSUN's dental casting photosensitive resin is specially developed for the dental field use. It has the features of high precision, high hardness, impact resistance, etc. The shrinkage rate is as low as 1.88%-2.45%. It is a good choice for dentists to make dental products.



Non-casting general photosensitive resin


Application Fields:

As we all known, the photosensitive resin used in desktop photo-curing 3D printers has the characteristics of vulnerability and the printed products are easily broken. Therefore, increasing the rigidity of the photosensitive resin becomes one of the solutions to the fragility of the printed product.


The non-casting universal photosensitive resin produced by eSUN is specially developed for parts prototypes requiring precision assembly parts. It has a hardness of 88D. It is very tough, has good impact resistance and strength, and is the best choice for manufacturing snap-fit joint prototypes and other products. Not only for that, the product also features DLP with fast print speed, low shrinkage, and a high degree of compatibility with LED UV light sources, and can be customized for any color.





The development of 3D printing technologies and materials is the driving force behind the advancement of the 3D printing industry. Based on this, eSUN contribute to promote 3D printing technology, whether the 3D printing filaments or 3D printers are both in independently researched and developed. Under the considering of safety, economy and practicality, the professional R&D team repeatedly tested and developed on these four photosensitive resins. And they have been well received by customers, in terms of stability, detail accuracy, and environmental protection.

In the future, eSUN will continue to research and develop various materials with different characteristics based on the industry and customer needs, and will contribute to the development of the global 3D printing industry.