With the rapid development of display technology, photopolymer resin has gradually become one of the core materials for display film manufacturing due to its high precision, fast curing and excellent molding performance. Especially with the support of 3D printing technology (such as SLA, DLP, LCD), photopolymer resin has shown unique advantages in the fields of liquid crystal display (LCD), flexible screen protective film, etc.
Technical advantages of photosensitive resins
Photosensitive resins achieve molecular cross-linking through UV curing, and their formulas usually contain monomers, oligomers, photoinitiators and functional additives. For example, Shenzhen U-Sunny's HM-103 resin is designed for display films. It has low viscosity (140-180 cps) and high resolution characteristics, which can capture micron-level details and is suitable for film printing for 2K to 12K ultra-high-definition screens. In addition, its glass transition temperature (Tg) exceeds 105°C, ensuring the stability of the film in high-temperature environments.
Application scenarios and industry needs
High-precision display film: The liquid properties of photosensitive resin enable it to fill complex microstructures, such as the light guide plate used in LCD backlight modules, and its refractive index (n=1.50) can optimize the light diffusion effect.
Flexible screen protection layer: By adding materials such as silane grafted polyolefin (Si-gPO), the resin film still maintains a glass adhesion of ≥15 N/mm after aging for 60 days at 40°C and 0% humidity, which is suitable for long-term use of flexible devices.
Circuit board manufacturing: Photosensitive resin replaces traditional dry film in the PCB exposure process, reducing material consumption by 60%. At the same time, by optimizing exposure parameters (such as time and layer thickness), the conductor size can be precisely controlled.
Market trends and product recommendations
According to IndustryARC's forecast, the photosensitive resin market will grow at a compound annual growth rate of 18.5% from 2021 to 2026, with 3D printing and medical imaging demand being the main driving forces. For the display film field, the following products are recommended:
U-Sunny HM-103: Optimized for DLP/LCD technology, it has high tensile strength (5500-6000 psi) and low shrinkage (<3.5%), suitable for mass production screen films.
eSUN PA100 nylon resin: Although it is mainly used in engineering applications, its high toughness (elongation 15%) and smooth surface properties can also be used for impact-resistant display components.
Usage and storage recommendations
To maintain the performance of photosensitive resin, it needs to be stored at 15-30°C and 20%-70% humidity to avoid light. Stir thoroughly before printing to remove bubbles and ensure that the printer parameters (such as UV wavelength 365-405nm) match the resin.
Conclusion
The innovation of photosensitive resin in the field of display film has not only promoted the miniaturization and flexibility of screen technology, but also provided cost-effective solutions for the manufacturing industry. Choosing proven products such as U-Sunny HM-103, combined with scientific process control, will help companies seize the technological high ground. In the future, with the continuous optimization of material formulations (such as the addition of UV absorbers), the application boundaries of photosensitive resins will be further expanded.