— Effectively addressing the challenges of debonding and light leakage With the rapid development of smart cockpits, in-vehicle displays are evolving towards larger sizes, narrower frames, and higher brightness. The increasingly sophisticated structure of display modules poses higher demands on frame bonding materials. Once the bonding fails, it can lead to light leakage and abnormal noise at the least, and debonding and reliability failure at the most, directly affecting the overall quality of the vehicle.
Common challenges in the display bonding industry: In the bonding of in-vehicle display frames, manufacturers generally face the following issues:
The alternating temperature changes cause a significant temperature difference in the interior environment of the degumming vehicle, and ordinary glue is prone to stress concentration due to thermal expansion and contraction.
The adhesive layer hardens, resulting in insufficient flexibility of the light-leaking colloid, which cannot absorb structural deformations, leading to changes in the frame gap.
The pollution caused by the by-products of curing manifests as white mist volatilizing during the curing of glue in certain display areas, affecting the optical display effect.
The long-term aging reliability is insufficient, and there is a significant performance degradation under high temperature, high humidity, and electrical environments.
Recommended solution: SIPA 1835 (H50) RTV SIPA 1830A/B two-component addition-type silicone adhesive SIPA 1835 (H50) is based on the RTV SIPA 1830A/B two-component addition-type silicone system, specifically designed for bonding automotive electronics and display structures. It ensures high bonding strength while providing long-term stable elastic cushioning capability.
This product can be cured at room temperature and also supports rapid curing through heating, making it suitable for automated production lines. During the curing process, no by-products are volatilized, and the volume change is minimal, making it extremely friendly to precision display modules.
The core product features a two-component addition-type system (1:1 mixture) with simple metering and stable process, suitable for dispensing, coating, and automated application.
No volatile white mist, no pollution. The curing process in the display area is clean, avoiding optical pollution and significantly reducing the risk of light leakage.
Once cured, the high-toughness silicone rubber elastomer is soft yet sturdy, effectively absorbing thermal stress and mechanical vibration.
Excellent thermal shock resistance, maintaining elasticity even at -54℃, suitable for harsh automotive operating conditions.
Excellent electrical insulation and protective properties possess good moisture resistance, shock resistance, corona resistance, and leakage resistance.
No primer is required, and it exhibits broad material adaptability, providing good adhesion to metals, glass, ceramics, and most polar plastics (special materials such as PP and PE may require primer or surface treatment).
Environmental compliance meets RoHS / halogen-free / FDA / REACH requirements, suitable for export and automotive projects.
In the application of in-vehicle displays, SIPA 1835 (H50) utilizes a combination of “flexible bonding and stress buffering” in the bonding process between the display frame and module structure:
Effectively prevent light leakage and bright edges caused by structural deformation due to frame debonding after long-term use. Improve the reliability of display modules under thermal cycling, vibration, and impact. Enhance the consistency of vehicle NVH performance and display quality. More application scenarios include bonding of PCB boards in vehicle display frames, application of dams, bonding of automotive electronic control boards, sealing and bonding of lighting fixtures, and bonding of plastic/metal housings. SIPA 1835 (H50) is not just an adhesive, but also a system-level solution specifically designed for the reliability of vehicle displays and automotive electronics. While ensuring structural strength, it provides long-term stable flexible cushioning, safeguarding the high quality and reliability of vehicle displays.
