| abstract |
Nonwoven fabric made of PP ultrafine fibers having an average fiber diameter of 2 to 10 μm, in which nano silver particles having an average particle diameter of 10 to 100 nm are uniformly kneaded, and having excellent antibacterial properties Provide filter material. An inorganic or organic silver compound and PP resin are heated and melted in an extruder, and nano silver particles having an average particle diameter of 10 to 100 nm are incorporated into PP resin in the range of 10,000 to 30,000 ppm in the process. The produced nano silver masterbatch is prepared, and then neat PP resin is blended and mixed with this to obtain an antibacterial nonwoven fabric composed of ultrafine fibers containing 800 ppm or more of the nano silver particles. [Selection figure] None |