Adhesive Solutions for LED Lighting Industry

LED is the most energy-efficient luminous body, which has been widely used in families, cities, industries, automobiles, aerospace and other fields.
Adhesives in LED lighting products mainly play the role of bonding, sealing, heat conduction, flame retardant protection, etc. The advantages and disadvantages of adhesives directly determine the safety, stability, atomization, light transmission, aging and durability of lighting products.

1. Common uses of adhesives in LED
Bonding and sealing of lamp frame
Encapsulated waterproof and thermal conductivity protection
Auxiliary heat dissipation of aluminum substrate
Heat conduction and flame retardancy of drive power supply
The circuit board is covered with three prevention protection
2. Introduction to glue for LED street lamps
1) Bonding and sealing of mask, panel and frame
Substrate: PMMA or glass mask plastic panel and aluminum frame.
Requirements: high transparency, no yellowing; It does not corrode PMMA, and the mask is well bonded to the aluminum frame, with high thixotropy and no vertical flow. Good aging resistance and insulation performance. The stress is small, the hardness is moderate, and the elongation at break is more than 240%.
2) Thermal bonding between LED lamp particles and aluminum substrate
Requirements: good wettability, helping to fill gaps, minimizing contact thermal resistance; Excellent thermal conductivity; Excellent electrical insulation; Wide operating temperature: operating temperature - 50~200 ℃; It will not dry and flow oil under high temperature.
3) Heat conduction encapsulation of power supply
Requirements: excellent thermal conductivity; Excellent electrical insulation; Wide operating temperature: operating temperature - 50~200 ℃; No drying and oil flow under high temperature; It is non-toxic, tasteless, non corrosive and environmentally friendly.

3. Introduction to glue used for LED guardrail pipe
1) Bonding and sealing of plug PC and PC
Requirements: no corrosion to PC, development trend: ultrasonic technology+UV glue
Recommended product: dealcoholized transparent single component silica gel
2) Circuit board potting protection
Requirement: good sealing performance.
Recommended product: transparent or milky silica gel
3) Shallow filling of the inner groove of the plug (waterproof, outlet hole positioning)
Requirements: tight sealing; Colloid is not yellowing and aging resistant
Recommended products: silica gel or epoxy adhesive
4. Introduction of glue for LED soft light strip
1) Encapsulation of soft light strip
Requirement: small color temperature deviation, deviation ≤ 2000K; Good adhesion and excellent sealing performance; The adhesive layer has good toughness and does not crack; No yellowing, good aging resistance.
2) Bonding of soft light strip plug
Requirements: good adhesion, yellowing resistance and aging resistance; The color is transparent.
5. Introduction of glue for LED bulb lamp
1) (Lamp cap and lens) structure bonding
Lamp cap bonding: bonding and sealing between metal and PC/PMMA
2) Built in power conduction encapsulation
Requirements: excellent flame retardancy and thermal conductivity; Fast curing speed; Deep curing; High temperature aging resistance, low stress; Good fluidity and bubble discharge, which can penetrate into the gaps of small components.
3) Heat conduction and adhesion between LED light source and alloy lamp body
Requirements: high thermal conductivity, high adhesion
4) Three proofing protection for PCB coating
Requirements: low viscosity, high strength, suitable for coating process and protecting components.

6. Introduction to T8 lamp tube adhesive
1) Bonding and sealing between lamp cap metal/PC and glass
Requirements: dealcoholized silica gel, not corrosive to PC; Tight sealing, no yellowing of colloid and aging resistance.
1) Heat conduction between LED module and aluminum substrate
Requirements: good wettability, helping to fill gaps, minimizing contact thermal resistance; Excellent thermal conductivity; Wide operating temperature: operating temperature - 50~200 ℃; It will not dry and flow oil under high temperature.
2) Bonding and fixing of lamp plate
Requirements: the highest flame retardant grade is V-0; It is suitable for bonding and sealing of flame retardant parts.
7. Introduction of glue for LED drive power supply
1) Potting of power controller
Requirements: good adhesion with wire and good sealing effect; No poisoning; Good waterproof performance and aging resistance; It has certain flame retardancy and thermal conductivity; Good adhesion and excellent sealing performance.
8. SMD LED/glue for wall lamp
1) Surface coating/encapsulation
Requirements: two-component transparent encapsulating silica gel, small deviation of LED luminous color temperature, deviation ≤ 2000K; Good adhesion and excellent sealing performance; The adhesive layer has good toughness and is not easy to pick off and crack with nails; No yellowing, good aging resistance.
9. Introduction of glue for LED light emitting module
1) Circuit board potting
Requirements: good adhesion with wire and frame; No yellowing, excellent aging resistance.
Recommended products: (repairable) silicone, (non repairable) epoxy
10. Introduction of glue for outdoor landscape lighting
1) Bonding and sealing between glass and aluminum shell
Requirements: high adhesive strength, excellent sealing performance.
2) Surface potting of circuit board
Requirements: The colloid is not yellowing and has good aging resistance; The potting adhesive s transparent and has certain flame retardancy and thermal conductivity.

11. Introduction to glue for LED spotlight
1) Bonding of lens and aluminum frame
Traditional technology: thread fixation, development trend: UV glue; UV glue with high transparency, aging resistance and no yellowing; It is white and transparent, without trace, and does not affect the appearance.
2) Heat dissipation and encapsulation of power supply
The potting adhesive shall be flame retardant and heat conductive.