About the Material Waterproof of LED Lamps
Lamps with waterproof material design use filling potting glue to achieve insulation and waterproofing, and use sealant to bond and close the joints between structural parts to make electrical components completely airtight and achieve the waterproof effect of outdoor lamps.
1. Potting glue
With the development of waterproof material technology, various types and brands of special potting adhesives for lamps and lanterns continue to appear, such as modified epoxy resin, modified polyurethane resin, and modified silicone. The chemical formula is different, the elasticity, molecular structure stability, adhesion, uV resistance, heat resistance, low temperature resistance, water repellency, insulation performance and other physical and chemical performance indicators of the potting compound are different.
Elasticity: The colloid is soft and the elastic modulus is smaller, so the adaptability is better.
Molecular structure stability: Under the long-term action of uV, air and high and low temperature, the chemical structure of the material is stable without aging and cracking.
Adhesion: Strong adhesion makes it difficult to peel off.
Hydrophobicity: indicates the ability of the colloid to resist water penetration.
Insulation: insulation is related to product safety indicators.
2. Sealing adhesive
Sealants are usually tubular packaging, suitable for gluing construction, and are generally used for bonding and sealing the joints between wire ends and shell structural parts. Commonly used single-component formula, reacts with air moisture at room temperature, and solidifies naturally.
The production process of waterproof material is long. One potting solidification cycle takes 24 hours. Some product designs are more complicated and even require 2 to 3 potting cycles, resulting in a long shipping cycle and a large number of production sites.