Integrated Molding Technology of LED Board Encapsulation and Film Coating
Has good mechanical strength, consistency, temperature resistance and weather resistance, no yellowing, no cracking, no stress, and repairable.
– Thermal shock resistance : -40 to 85 °C for over 100 rounds.
– High Weatherability Salt and alkali resistant, low deformation force, and flexible.
– High Scratch Resistance : The surface is scratch resistant with above 3H scratch hardness.
– High Maintainability Uniform appearance even after repairing and the light is soft.
– High Consistency UV resistant, no yellowing, no reflection and high consistency.
– Economical : Cost-effective, waterproof, moisture-proof and anti-collision.
Technical Advantages
COT products have passed the thermal cycle testing
of -40°C~85°C for more than 150 times without defects such as dead leds, cracking and so on.
After COT treatment, the usual surface collisions will not cause any damage to leds.
After COT treatment, the deformation warping under extreme temperature conditions will be effectively reduced and the deformation stress is low.
After COT treatment, the occurrence of yellowing, blistering and delamination caused by extreme temperature will be effectively reduced .
After COT treatment, the occurrence of thickness difference, unevenness and color difference will be effectively reduced.
Put a conventional GOB product and a COT product together, and then use a screwdriver to scratch the product surface. It turns out that the GOB product is not scratch resistant with scratches and cracks occurred immediately, while the COT product has no damage.
Red Dye Penetration Testing & ESD Testing
Smooth Touch Feel
· The surface is scratch-resistant and smooth reaching the level of 3H
· Super consistency. To achieve the same appearance color from thousands to tens of thousands of square meters.
High Protection Grade
· Super strong anti-blue light and anti-ultraviolet abilities ensure no yellowing for 5 years.
· Super environmental adaptability, reaching -40 to 85°C thermal shock resistance standard, which is unmatched by other solutions.
· Super protection. Super waterproof and moisture-proof, and salt and alkali resistant.
Anti-Deformation
· Anti-deformation. In the case of -40°C, deformation does not exceed 5%.
· Matte surface treatment. Highly consistent surface roughening treatment , non-reflective.
Even Thickness
· Uniform thickness. There is no obvious difference in thickness as the boards almost won’t deform.
· Maintainability. No color difference after maintenance and no yellowing.
Cot vs GOb
Items | Condition | COT | GOB |
|---|---|---|---|
Thermal Shock Test | -40 -85 | >150 times | <10 times |
High Temperature / High Humidity | 85°C/85RH | >150H | <72H |
UV | UVA+UVB | 168H Attenuation of less than 2% | 168H Yellowing |
Grey Scale 255 Aging | 255 aging | Ok | No |
Low Temperature Storage | -40°C/200H | Ok | No |
Pressure Cooker Test | 121°C, 2atm | 12H | No |
Anti-static | >=8000V | 12000V | 6000V |
Maintenance | No appearance diffference | Gap | |
Cleaning | Cloth with ethanol | Chemicals (Naphtha) | |
Scratch Resistance | Pencil Hardness Test | 2H | HB1 |
Deformation | No | Yes | |
Color Consistency | High | Average | |
Thickness Consistency and Uniformity | High | Average | |
Anti-collision/Touch | High | High | |
Moisture-proof | High | High | |
Acid and Alkali Resistance | High | High |
Cot vs COb
Items | Condition | COT | GOB |
|---|---|---|---|
Thermal Shock Test | -40 -85 | >150 times | <100 times |
High Temperature / High Humidity | 85°C/85RH | >150H | >150H |
UV | UVA+UVB | 168H Attenuation of less than 2% | 168H Yellowing |
Grey Scale 255 Aging | 255 aging | Ok | Ok |
Low Temperature Storage | -40°C/200H | Ok | Ok |
Pressure Cooker Test | 121°C, 2atm | 12H | 12H |
Anti-static | >=8000V | 12000V | 6000V |
Maintenance | No appearance diffference | Gap Generated | |
Cleaning | Cloth with ethanol | Chemicals (Naphtha) | |
Scratch Resistance | Pencil Hardness Test | 2H | HB1 |
Deformation | No | No | |
Color Consistency | High | Average | |
Thickness Consistency and Uniformity | High | High | |
Anti-collision/Touch | High | High | |
Moisture-proof | High | High | |
Acid and Alkali Resistance | High | High | |
Module Size | Big Board | Small Board |
Cot vs Bare board
Items | Condition | COT | GOB |
|---|---|---|---|
Thermal Shock Test | -40 -85 | >150 times | <100 times |
High Temperature / High Humidity | 85°C/85RH | >150H | <72H |
UV | UVA+UVB | 168H Attenuation of less than 2% | 168H Attenuation of less than 2% |
Grey Scale 255 Aging | 255 aging | Ok | Ok |
Low Temperature Storage | -40°C/200H | Ok | Ok |
Pressure Cooker Test | 121°C, 2atm | 12H | 12H |
Anti-static | >=8000V | 12000V | 1000V |
Maintenance | Convenient; No appearance diffference | Very convenient | |
Cleaning | Cloth with ethanol | Not Convenient | |
Scratch Resistance | Pencil Hardness Test | 2H | No |
Deformation | No | No | |
Color Consistency | High | High | |
Thickness Consistency and Uniformity | High | High | |
Anti-collision/Touch | High | Low | |
Moisture-proof | High | Low | |
Acid and Alkali Resistance | High | Low |
Cot vs Film coating
Items | Condition | COT | GOB |
|---|---|---|---|
Thermal Shock Test | -40 -85 | >150 times | <100 times (Discolour&Cracking) |
High Temperature / High Humidity | 85°C/85RH | >150H | <72H (Discolour&Cracking) |
UV | UVA+UVB | 168H Attenuation of less than 2% | 168H Attenuation of less than 10% |
Grey Scale 255 Aging | 255 aging | Ok | Ok |
Low Temperature Storage | -40°C/200H | Ok | Delamination |
Pressure Cooker Test | 121°C, 2atm | 12H | 12H (Discolour) |
Anti-static | >=8000V | 12000V | 2000V |
Maintenance | Convenient; No appearance diffference | Very convenient | |
Cleaning | Convenient | Not Convenient | |
Scratch Resistance | Pencil Hardness Test | 2H | No |
Deformation | No | No | |
Color Consistency | High | High | |
Thickness Consistency and Uniformity | High | High | |
Anti-collision/Touch | High | Low | |
Moisture-proof | High | Low | |
Acid and Alkali Resistance | High | Low |