Products

D. Optically Clear Adhesives

OpticPB® 378 Series
Secondary UV OCA for Consumer Electronic Applications

The OpticPB® 378 series is a secondary UV-curable optically clear adhesive film (UV-curable OCA) developed for full lamination of IPS liquid-crystal touch displays and consumer display modules. It adopts a low-modulus acrylic OCA design that helps reduce lamination stress and minimize display non-uniformity issues such as color mura after panel lamination.
The product also offers good optical performance and downstream process flexibility. After vacuum lamination, a secondary UV curing step can be applied to further improve structural stability and long-term reliability. Representative grade 37810 has reliability records for simulated sunlight and environmental tests, making it suitable for IPS LCD panels and consumer electronic display applications.
Product Features
01
Low-Modulus Design to Reduce IPS Lamination Stress
Helps lower internal stress after lamination and reduce the risk of color mura or other non-uniform display issues common in IPS panels.
02
Secondary UV Curing after Vacuum Lamination
Improves structural stability and process reliability after lamination, suitable for consumer display module applications.
03
Reliability Records for Sunlight Simulation and Environmental Tests
Representative grade 37810 has test records for high/low temperature, damp heat, thermal shock, and sunlight exposure.
Typical Applications
IPS touch panels and consumer display modules
Representative Grade: OpticPB® 37810 | Representative Test Thickness: 0.25 mm
Supply Format: 1,200 mm × 400 m / roll; customized die-cut dimensions
Application Image and Technical Characteristics
OpticPB® 378 Application Illustration
OpticPB 378 IPS LCD application illustration
IPS Touch Display Application | OpticPB® 37810 (250 μm) / 3788 (200 μm)
OpticPB® 37810 | Representative Grade Specifications
Representative Test Thickness: 0.25 mm | 180° Peel Test Speed: 300 mm/min
Optical and Adhesion Properties
Haze (%)
0.11
Total Light Transmittance (%)
90.15
Yellowness b*
0.44
Refractive Index
1.48
180° Peel Strength – Glass
37 N/25 mm
180° Peel Strength – Polarizer (TAC)
23 N/25 mm
Environmental Reliability Test Records
High Temperature
105°C × 1,000 h
Pass
Low Temperature
−40°C × 1,000 h
Pass
High Temperature / High Humidity
85°C / 85%RH × 1,000 h
Pass
Thermal Shock
−40°C ⇔ 85°C × 1,000 cycles
Pass
Sunlight Exposure – IEC 60068-2-5 Sa3
1,000 h
Pass
Note: The data above are for representative grade 37810. Optical properties were measured using a Glass/OCA/Glass structure at room temperature. Refractive index was measured at 23°C and 589 nm (JIS K 7142). Peel strength is expressed in N/25 mm. Refer to the latest technical data for actual specifications and applicable conditions.

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