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Corrosion-resistant brush filaments are widely used in industrial cleaning, medical devices, automotive manufacturing, and other fields. Whether they are damaged by ultraviolet (UV) rays depends primarily on their material composition and production process.

There are significant differences in the properties of mainstream brush filament materials:

Polypropylene (PP): Low in cost and has basic UV resistance. However, unmodified PP filaments tend to become brittle after long-term exposure to sunlight.

Nylon 66 (PA66): Excels in mechanical strength, but pure PA66 is sensitive to UV rays. Its molecular chains are prone to breakage when unmodified.

The impact of UV rays on brush filaments is highly polarized:

When unmodified brush filaments are exposed to outdoor environments or strong UV radiation for an extended period, their molecular chains are damaged, leading to discoloration, brittleness, and shortened service life. For example, unmodified PP brush filaments exposed to outdoor sunlight for 6 months may see their service life reduced by 30% to 50%.

In contrast, modified brush filaments with added UV absorbers and light stabilizers can block UV-induced damage effectively.

In practical applications, UV protection can be achieved through three key measures:

Select filaments based on the environment: Prioritize modified filaments for outdoor use.

Proper storage and protection: Store unused filaments in a dark place and protect idle brushes from UV exposure.

Regular inspection and replacement: Check outdoor brushes every 3 months and replace them promptly if abnormalities (e.g., brittleness, discoloration) are found.

When purchasing, it is advisable to request UV resistance test reports from manufacturers to ensure the brush filaments are suitable for the intended application scenario.