The three defenses of the three-proof dust bag are "waterproof, oil-proof, and anti-static".
That is to say, on the basis of the anti-static needle felt, the function of "water repelling and oil repelling" is added, which is suitable for occasions with high moisture content, and conductive fibers or stainless steel conductive materials are mixed into the chemical fibers for the production of needle felt.
The three-proof dust bag has certain advantages, that is, the surface is smooth, the dust is easy to clean, and the running resistance is reduced.