METHOD FOR MANUFACTURING NONWOVEN GEOTEXTILE HAVING FUNCTION OF ADSORBING HEAVY METALS AND HARMFUL SUBSTANCES

摘要

The present invention relates to a geotextile having a function of adsorbing heavy metals and harmful substances, which has a function of adsorbing harmful ingredients in leachate, a function of protecting a geomembrane which is a dimension liner, and a filtering and drainage function. The present invention relates to a method for manufacturing a nonwoven geotextile composed of an inner short fiber aggregate and an outer short fiber aggregate attached to one side or both sides of the inner short fiber aggregate, the method comprising: a first step of preparing pellets for fiber spinning by adding particulate clay to a silica resin and melt-compounding the same; a second step of mixing a polypropylene resin with pellets prepared by the first step; a third step of placing the resin mixed in the second step into an extruder and heating the same to vaporize the silica resin surrounding the particulate clay to remove gas; a fourth step of preparing fibers containing clay by spinning the resin in a state where the vaporized gas of the silica resin is removed by means of melt spinning; a fifth step of forming the inner short fiber aggregate and the outer short fiber aggregate by using the clay-containing fibers prepared in the fourth step as matrix fibers, and using low-melting short fibers that melt at 80-220 C as reinforcing fibers; a sixth step of controlling the density and thickness by heating and compressing the short fiber aggregate prepared by the fifth step at a constant temperature and pressure; and a seventh step of laminating the short-fiber aggregate prepared by the sixth step and then needle-punching and combining the same.;COPYRIGHT KIPO 2020