What are the specific aspects of the weatherability of solar high-temperature adhesive tape?

The weatherability of solar high-temperature adhesive tape is embodied in these seven core aspects.

(It is a key indicator for industry acceptance, selection and testing, completely surrounding the double scenes of outdoor long-term use of photovoltaic modules for 25 years and laminating high-temperature technology.)

1. Resistance to ultraviolet (UV) aging

This is the core outdoor weather resistance index.

Under long-term direct sunlight, the substrate is not brittle, powdery and cracked.

The adhesive layer does not yellow, fail or degum.

Will not cause sudden drop and falling off of adhesive force due to UV aging.

Satisfied: the performance of UV aging test has no obvious attenuation over 1000h h.

2. High temperature resistance & temperature shock resistance

Lamination process tolerance: no melting, no glue flow and no deformation at high temperature of 140 ~ 160℃

Outdoor high temperature tolerance: the temperature of the back plate of the module can reach above 85℃ in summer, and it will not soften or overflow for a long time.

Resistance to cold and hot shock: the adhesive tape will not be brittle, not warped and not damaged by repeated circulation at-40℃ ~ 85℃.

3. Humid heat aging resistance (double 85 test)

Compulsory assessment of photovoltaic industry: long-term placement in 85℃/85% RH hot and humid environment.

The adhesive layer is not hydrolyzed, moldy and sticky.

The base material does not absorb moisture, does not expand and does not reduce insulation.

The peeling force retention rate is high, and "false adhesion and off-edge" will not occur.

It directly determines the service life of components in wet areas and coastal areas.

4. Low temperature resistance

The temperature can reach -40℃ or even lower at night in cold regions and winter.

The adhesive tape remains tough, not hard, brittle and falling off.

At low temperature, it still keeps a certain fit, and there is no edge warping or water vapor entering.

5. Water vapor resistance, waterproof and sealing performance

Prevent rain, dew and moisture from infiltrating into the battery cell and junction box.

No hydrolysis and degumming in high humidity environment.

Adhesive tape for edge sealing and junction box fixing, without water seepage channel for a long time.

This is especially important in the scene of double glass components and frame sealing.

6. Acid and alkali resistance and salt fog resistance (necessary for coastal/industrial and commercial power stations)

Resistant to acid rain, dust and industrial waste gas corrosion

Salt fog resistance in coastal areas: no corrosion by chloride ions, no rust and no degumming.

Good compatibility with EVA, POE, photovoltaic glass and aluminum alloy frame, no chemical reaction.

7. Dimensional stability and long-term mechanical maintenance

Long-term outdoor use does not shrink, does not extend, and does not become warped.

The tensile strength and tear resistance remain stable and do not break.

The adhesive layer has strong cohesion, and there is no residual adhesive and no pollution to components during peeling.

Simple summary: solar high-temperature adhesive tape with good weather resistance must be

Sun-fast (UV-resistant)

Heat-resistant (high temperature resistant)

Tide is not bad (resistant to damp and heat)

Freeze-proof (low temperature resistance)

Non-corrosive (salt fog acid and alkali resistant)

No edge warping, no glue dropping and no residual glue.