New generation DuPont™ resin

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By Jim Badders | Mar 22, 2019
Liquid resin for bonding

Liquid optically clear adhesive (LOCA) is one of the most popular and preferred bonding solutions for display integration. DBA 4235, the newest variant of DuPont™ Vertak® bonding adhesives, is an optically clear resin specifically designed for rugged environments. With the ability to bond rigid-to-rigid and LCD-to-rigid material, this new generation resin is suitable for most display designs.

DBA 4235’s higher viscosity reduces the flow of excess adhesive and fills contoured and uneven surfaces better than dry film optical adhesive. From military to aerospace, the resin can meet the most rigorous demands of highly-regulated industries and doesn’t fall prey to premature degradation over time. It can not only withstand long-term wear and tear, but also endure extreme temperatures, sustained vibrations, and heavy impacts without compromising on durability. By preventing condensation and fogging, the resin plays a crucial role in enhancing the readability and performance of the device. In all bonding applications, the ability to deconstruct the various layers of a bonded display provides significant flexibility in terms of designing and keeping the manufacturing costs in control. When compared to other resins, DBA 4235 scores high on its reworkability.

 When compared to consumer grade resins, the DBA 4235 resin offers the following advantages -

  • Higher viscosity and superior adhesion
  • Reworkability
  • Improved durability
  • Condensation and fogging prevention
  • Resistance to temperature and impact

As a licensed convertor of DuPont’s Vertak® technology, GMN has started employing DBA 4235 in all its LOCA solutions, namely laptops, touch panels, and hand-held devices. On the production floor, automated robotic dispensing equipment is routinely utilized to apply this UV curable resin, making the process extremely clean, consistent, and repeatable. GMN uses a combination of automated and manual inspection systems to flag defects and ensure that products meet the exact customer specifications. First, an automated camera system identifies major defects and imperfections in bonding such as bubbles, contamination, and defective pixels. Then, it is followed by a manual inspection process that detects intricate flaws like surface blemishes, smears, handprints, and more.

 With years of experience in front panel integration and bonding solutions, the experts at GMN rely only on the industry’s finest technologies to serve a wide range of industries. The new-generation optically clear resin from DuPont™ has truly empowered GMN to create products of the highest quality and deliver maximum value to customers.