PVC corrugated hose is a great material with excellent properties
When rubber hoses are used improperly, they age quickly. So what causes rubber hoses to age?
Oxygen plays a role in this process, and different hoses age differently under its influence. For example, natural rubber hoses, isoprene hoses, and butyl high/low pressure hoses undergo thermal-oxygen aging. During this process, their macromolecular chains mainly break, making the hoses soft and sticky. On the other hand, SBR, CR, NBR, and EPDM hoses react differently. When their chains break during thermal-oxygen aging, the products mainly twist together. This destroys the industrial hose’s elastic structure, making it hard and brittle.
Heat also causes hoses to degrade once they reach a certain temperature. Natural rubber hoses, for instance, start breaking down into low-molecular substances when temperatures exceed 200℃. A hose’s thermal stability depends mostly on its chemical composition and structure. Among common hoses, butadiene rubber hoses have the best thermal stability, followed by SBR hoses.
To delay aging, adding antioxidants helps. These agents trap the active substances produced during a hose’s thermal-oxygen aging. In doing so, they help preserve the hose.
The root of thermal-oxygen aging in high and low pressure hoses is their unsaturated bonds. In contrast, hoses with more stable structures—like silicone, fluorine, butyl, PU, and acrylic hoses—are elastomers that resist heat-induced aging.
Related posts
