CNLC LED Modules: Precision Glue Dispensing and Push Force Testing for Superior Reliability

At CNLC, durability is engineered from the inside out. Our outdoor LED display products are built on a high-strength aluminum structure, offering superior heat dissipation, corrosion resistance, and structural stability in extreme weather. But beyond the outer shell, what truly ensures long-term performance lies within — the reliability of the LED module.

Whether used in outdoor LED billboards, smart city pole displays, or rental LED screens, every CNLC module is manufactured with strict structural testing, precise glue dispensing, and mechanical reinforcement. In this article, we present test results from our P2.976 SMD1415 module (250×500mm) to illustrate the quality control system applied across all CNLC LED modules.

🔹 Why Glue Dispensing Matters in Outdoor LED Module Design

All CNLC outdoor LED modules use precise glue dispensing along the PCB edges (not on LED surfaces), which significantly enhances:

• Waterproof sealing (higher IP rating)

• Structural reinforcement (anti-vibration and anti-deformation)

• Anti-drop protection for LED lamps during transport and impact

🔹 Real Test Data: Push Force Before & After Glue Application

To verify glue reinforcement, we performed push force tests on a P2.976 module before and after glue application. Results show substantial strength improvements across both sides:

This level of reinforcement is applied across all CNLC modules, making our products more resistant to physical stress, transportation shock, and thermal expansion.

🔹 High-Temperature Curing Process Ensures Bonding Stability

After glue application, all CNLC LED modules are placed in 130°C curing ovens for 40 minutes, ensuring full adhesive bonding and long-term durability:

• Tightly bonded structural layers

• Enhanced temperature resistance

• Stable structure even under high humidity and UV exposure

✅ CNLC LED Modules: Built for Harsh Outdoor Environments

With glue dispensing, push-pull force testing, and high-temperature curing as standard practices, CNLC applies a unified manufacturing protocol across all LED modules, regardless of pixel pitch or screen size.

• ✅ Preventing LED lamp failure and drop-off

• ✅ Achieving waterproof, shockproof, and anti-deformation reliability

• ✅ Extending product lifespan in outdoor conditions

CNLC always starts with the structural integrity of the LED module to ensure the safety, stability, and long-term reliability of the display during outdoor operation.

With our in-house SMT factory, fully automated module production lines, and high-temperature curing process, we achieve a vertically integrated manufacturing workflow — from component placement to finished module delivery — providing customers with higher-quality and more efficient LED module solutions.