How to prevent pollution of non-woven fabric

1) The oil-repellent finishing liquid dirt is mainly contaminated on the surface of the fiber through wetting, and then contaminates the interior of the fabric, between the fibers and between the yarns through capillary action. The principle is similar to the wetting and penetration of the fiber surface by water, except that the surface tension of oily liquid dirt is usually lower than that of water. Therefore, the liquid dirt has a strong wetting ability on non-woven fabrics. In order to prevent the wetting and spreading of such substances on the fiber surface, the critical surface tension of the fiber surface must be at least lower than the surface tension of the above-mentioned dirt in order to have oil repellency, so that the above-mentioned dirt has the ability to resist and prevent it from adhering to the fiber. surface. (2) The dirt that is actually contaminated on non-woven fabrics for easy decontamination finishing is generally composed of liquid and particles. The purpose of easy decontamination finishing is to make the oily liquid dirt on the hydrophobic fiber easy to be removed, and because liquid dirt is often used as a carrier and cementing agent for particles, if the liquid dirt is easy to wash off, the particles will also be easily removed. Remove. Dirt detached from the surface of the non-woven fabric is not only related to the washing conditions and other factors, but also mainly depends on the critical surface tension of the fiber surface, which is related to the surface energy of the non-woven fabric. The fabric must be easy to decontaminate and resistant to moisture. Performance, it has high wettability in liquid medium, and low interface energy to common oily dirt in air medium, so that it can have a good antifouling effect.