Intermediate Bulk Containers (IBCs) store and transport liquids. However, sunlight can harm their lifespan and effectiveness. This report looks at how UV radiation impacts IBC totes. It covers their lifespan in sunlight and ways to protect them for longer use.
Sunlight can damage IBC totes made from high-density polyethylene (HDPE). This exposure leads to a degradation process that weakens their structure. IBC plastic can get brittle if it’s exposed to sunlight’s UV radiation for too long. Degradation usually starts at the top of the tote. This area gets the most direct and longest sunlight exposure.
The science behind this damage is photooxidation. Here, UV light starts chemical reactions in the polymer structure. As these reactions happen, they create free radicals. These radicals break down the plastic’s molecular chains. The consequences of this degradation include:
This degradation harms the container and can also affect what’s inside. Sunlight can cause algae to grow in IBCs used for rainwater collection. This growth can contaminate the stored water.
The durability of IBC totes in sunlight depends on a few factors. These include manufacturing quality, UV stabilization, and environmental conditions. An IBC tote usually lasts about five years when kept outside in normal conditions. Some top-notch IBC totes can last over five years. This is true even when they sit in direct sunlight and hold water.
However, without proper protection or maintenance, this lifespan can be significantly reduced. UV radiation intensity changes by location. Areas near the equator or at high altitudes get more intense UV exposure. This can speed up degradation. Containers in south-facing spots in the Northern Hemisphere get more direct sunlight. This can shorten their lifespan unless you provide extra protection.
Geographic location and UV intensity
Orientation (south-facing exposure accelerates degradation)
Quality of the original manufacturing
Presence and quality of UV stabilizers
Contents stored (some may accelerate degradation)
Maintenance practices employed
Most modern IBC totes use UV stabilizers in their production. This helps reduce the harmful effects of sunlight exposure. These UV inhibitors are built into the plastic. They help cut down UV damage and make the tote last longer.
The protective mechanisms employed in UV-stabilized IBC totes include:
With these protective measures, UV-resistant IBC totes can last over ten years. This is much longer than standard versions that lack this protection. Even with UV stabilizers, these protective compounds fade over time in the sun.
If you’re worried about UV damage, check if your IBC totes have UV stabilization. Not all models include this, especially older or recycled ones.
You can use several effective methods to protect IBC totes from UV damage. This helps extend their life and keeps the stored contents in good condition:
UV-resistant IBC covers provide an excellent first line of defense against sun damage. These special covers fit over the tote. They protect against UV rays, dust, dirt, and moisture. Many commercial covers use tough 420D polyester fabric. They have a waterproof coating. This lets them handle extreme temperatures and keeps the tote safe.
These covers typically feature:
Complete enclosure of the tote with UV-blocking material
Zippered fronts for easy access to valves and outlets
Velcro lids to accommodate inflow pipes or hoses
Durable construction to withstand outdoor conditions
Several direct modifications to the tote itself can provide UV protection:
Black Plastic Wrapping: To use this DIY method, first remove the tote from its cage. Then, wrap it in 6mm black plastic. Finally, reinstall the cage. This approach prevents light penetration, inhibiting both UV damage and algae growth.
Paint Application: Using white paint on the tote’s exterior cuts down UV absorption. However, it’s crucial to use paint specifically formulated to adhere to HDPE plastic.
Wrap the tote in insulative materials from hardware stores. This helps protect it from UV rays and keeps the temperature stable.
For the most comprehensive protection, especially in high-UV environments:
Shade Structures: Use simple shed roofs or shading structures over IBC totes. They protect the totes from direct sunlight.
Place totes in shaded areas or on the north side of buildings. This can lower sun exposure a lot.
IBC totes will break down when they are in sunlight. UV rays cause the plastic to undergo photooxidation, leading to degradation. Many modern totes have UV stabilizers. These help them last about five years in direct sunlight. However, extra protective steps can make them even more durable.
Store IBC totes outside for rainwater harvesting? Consider these tips for protection:
By using these methods, users can help their IBC totes last longer. This could extend their life beyond the usual five years. It also keeps the stored contents in good condition.
For critical tasks or harsh UV settings, change totes early. This helps avoid major damage and loss of contents.
