Welcome to the Expert Team of the China Radiation Curing Association at Esun for Guidance!
On October 20, the expert team from the China Radiation Curing Association visited Shenzhen Esun Industrial Co., Ltd. (brand “eSUN”) to inspect and guide the development of its photopolymerization business.
During the meeting, eSUN introduced the company’s main products, business, and development framework to the experts. Both sides conducted in-depth discussions and exchanges on issues encountered in the development and application of photosensitive polymers, reaching agreements on key raw material development, industry standards, and project collaborations.
eSUN focuses on the industrialization of environmentally friendly materials. In the development of photosensitive polymer products, the company has mastered the development of bio-based photosensitive resin formulas suitable for SLA, DLP, and LCD technologies. They offer consumer-grade resins, engineering-grade resins, and professional dental application resins.
eSUN Bio-based Photosensitive 3D Printing Resin
In 2018, eSUN officially applied for the patent “PLA Bio-based Photosensitive Resin and Its Uses and Methods.” Leveraging its proprietary PLA polyol, eSUN developed a series of bio-based 3D printing photopolymer resins, including high-precision bio-based resins, water-washable bio-based resins, and high-transparency bio-based resins.
Life cycle assessment (LCA) shows that compared to traditional petrochemical-based polyol production, PLA polyol reduces greenhouse gas emissions by 40%.
Currently, eSUN’s high-precision bio-based resins have passed biocompatibility testing, skin sensitization, skin irritation, and cytotoxicity tests, all meeting standards. These products are low-irritation and safer for both humans and the environment.
The bio-based resin series can be applied in prototype design, dental models, figurines, decorative items, and creative products.
eSUN Engineering Resin Materials
The cost of opening molds for industrial parts is high, and printed parts may have low strength or poor heat resistance, making them unsuitable for practical applications. Based on industry challenges, eSUN has launched several engineering resins, such as acrylic-like resins, nylon-like resins, ABS-like high-strength resins, tough and hard resins, high-temperature resistant resins, and flexible resins.
For example, eSUN’s high-temperature resistant resin, launched in July this year, demonstrated through professional testing that models printed with this resin can be heated at 200°C for 30 minutes without deformation. Even after heating in a 220°C oil bath for over 30 minutes, the material maintained stability with no deformation, showcasing outstanding heat resistance.
Based on heat distortion tests (test standard: ASTM D648), under a pressure of 0.45MPa, the heat distortion temperature of this high-temperature resistant resin material exceeds 280°C. Additionally, the material features high hardness, high strength, high rigidity, and high precision. The model surface is smooth, with low shrinkage.
eSUN Dental Resin Materials
Dental applications are one of the key focus areas for the development of 3D printing, but the limitations and deficiencies of materials can directly impact treatment efficiency. Addressing issues encountered in practical applications, eSUN has launched a series of dental photopolymer resins, including SG100 Surgical Guide Resin, OM100 Orthodontic Model Resin, DM100 Restoration Model Resin, DC100 Dental Casting Resin, WO100 Water-Washable Orthodontic Resin, CT100 Customized Tray Resin, GM100 Gingiva Simulation Resin, and TC100 Temporary Crown and Bridge Resin. These materials have already been applied in dental clinics and related facilities.
For example, the accuracy of dental restoration model resins directly affects treatment efficiency. Poor accuracy and unclear details in dental models may result in a mismatch between the prosthesis and the patient’s restoration area. Therefore, high-precision dental resins are required to print accurate models with clear edges and contact points, reducing the return rate. Additionally, dental models must have high dimensional stability in the short term and low shrinkage to meet the delivery requirements for crowns.
eSUN’s DM100 Dental Restoration Model Resin is specifically designed for printing high-precision, low-shrinkage models and is compatible with most 405nm wavelength LCD/DLP printers. This resin delivers high accuracy and dimensional stability (with more than 95% precision retention within 7 days), making it especially suitable for printing demanding dental models, resulting in higher-quality production. These dental models also exhibit excellent surface quality and wear resistance, reducing surface damage during crown fittings. The material can be used for pre-surgical simulations of implantations and tooth replacements, and some can also be directly used for orthodontic models.
The production of digital surgical guides is based on 3D tomographic scan data from CBCT and digital impression data, using professional guide design software for virtual implantation. This process helps determine the optimal implant location, effectively avoiding the nerve canal and preventing common issues during implant surgery, such as sidewall perforations or poor implant positioning, direction, and depth.
eSUN’s Surgical Guide Resin is a biocompatible dental resin that can be sterilized under high pressure, designed for making surgical guides. Using a surgical guide enables the surgeon to determine the height of the bone cut, the direction of implant placement, and the depth of implant insertion, allowing for safer and more precise implantation into the jawbone,and improving the safety and success rate of implant surgery.
Through unique photopolymerization post-processing technology, eSUN enables the resin to form a highly cross-linked molecular structure during the post-curing process, significantly enhancing the material’s flexural strength and impact resistance. Additionally, it helps maintain dimensional stability during high-temperature steam sterilization, preventing deformation. These high-strength characteristics make this guide resin ideal for applications requiring high strength, such as surgical guides for implant procedures.
eSUN 355nm SLA General Resin
In addition to the commonly used LCD resins, eSUN has developed a low-viscosity, cost-effective SLA 3D printing photopolymer resin. This material offers fast curing speeds, high precision, strong mechanical properties, low odor, good storage stability, and broad compatibility, making it suitable for most mainstream SLA rapid prototyping equipment in China. It can be used to produce durable, rigid, and waterproof functional parts.
Additionally, PLA polyols can also be applied in areas such as UV adhesives and UV varnishes.
As one of the most promising directions in the development of eco-friendly adhesives, UV adhesives offer no VOCs, low toxicity, and rapid curing, which helps reduce labor costs, making them ideal for automated production lines. UV adhesives also provide excellent bonding performance on various substrates, with strong adhesion and weather resistance. As thermosetting materials, they can be used as structural adhesives, meeting customers’ personalized needs, including appearance, color, viscosity, hardness, and curing conditions.
UV varnishes are widely used in everyday life. On one hand, they serve a protective function, improving adhesion and making UV-printed materials more scratch-resistant, weather-resistant, and durable. On the other hand, after applying UV varnish, printed media becomes more vibrant and glossy, enhancing the visual effect. This product is widely used in packaging, cigarette boxes, grease-proof paper, and more.
In the future, with the continuous optimization of equipment, materials, and printing technologies, photopolymer 3D printing technology will penetrate more industries. eSUN will continue to adhere to the philosophy of “differentiated positioning and open innovation,” actively collaborating with various parties to improve the standards for photopolymer 3D printing and further promote the comprehensive development of specialized applications.