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Catalog > Coatings and Buffers

Coatings and Buffers

Buffer coatings are applied to optical fiber while the fiber is being drawn. The purpose of the buffer is to protect the fiber from environmental conditions, especially moisture and abrasion, which might accelerate the generation of stress-cracks in the silica surface. Several types of coatings are used depending on the application. The most durable is polyimide but acrylate, silicone, fluoropolymers and aluminum are also used. Polymicro has all of these available and will work with you to determine which is most suitable for your application.

Polyimide is generally applied in a thickness from 5mm to 25mm depending on the fiber size. Acrylate and silicone thickness can be varied from 10mm to 140mm and depend on the application and fiber size. Aluminum generally varies from 20mm to 45mm, increasing with increasing fiber size.

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