LED potting adhesives are broadly categorized by function, application, and base material. Here’s a detailed breakdown:

By Function

1. Mechanical Protection Type

• Characteristics: Low hygroscopicity, low stress, and aging resistance.
• Purpose: Enhances LED reliability by safeguarding components from physical damage, moisture, and environmental stress.

2. Enhanced Heat Dissipation Type

• Characteristics: Efficient thermal conductivity to reduce chip junction temperature.
• Purpose: Improves LED performance and longevity by mitigating overheating issues.

3. Optical Control Type

• Characteristics: High light transmittance and precise refractive index control.
• Purpose: Optimizes light distribution (e.g., beam angle, uniformity) and maximizes light output efficiency.

By Application

1. Illumination Potting Adhesives

• Includes: Lamp potting adhesives, flexible strip potting adhesives, rigid strip potting adhesives, and bulb lamp bonding sealants.
• Use Case: Seals and protects LED lighting fixtures, ensuring waterproofing and structural integrity.

2. Display Electronics Potting Adhesives

• Functions: Beyond general electrical module protection, provides insulation, waterproofing, and component fixation.
• Use Case: Critical for LED display panels to withstand vibration, moisture, and electrical stress.

3. Module Potting Adhesives

• Definition: Adhesives used to cure multiple LEDs into functional modules.
• Types:
• Soft Elastic Cures: Flexible, shock-absorbing materials (e.g., for flexible LED strips).
• Rigid Cures: Hard, transparent/opaque materials (e.g., for rigid modules requiring structural stability).

By Base Material

1. Epoxy Resin (EP) Potting Adhesives

• Characteristics: High mechanical strength, chemical resistance, and dimensional stability.
• Use Case: Ideal for high-reliability applications (e.g., industrial lighting, automotive LEDs).

2. Silicone Potting Adhesives

• Characteristics: Excellent heat resistance (up to 200°C+), flexibility, and UV stability.
• Use Case: Widely used in outdoor/high-temperature environments (e.g., streetlights, plant lights).

3. Polyurethane (PU) Potting Adhesives

• Characteristics: Balanced flexibility and durability, with good impact resistance.
• Use Case: Suited for applications requiring shock absorption (e.g., portable LED devices, underwater lighting).