... is a new construction material, which the raw material is polypropylene fiber,polyester fibre,acrylics,nylon and other high polymer, without ... 5. To prevent the upper and lower sand, soil and concrete mix. 6. The mesh is not easily blocked, because ... still maintain good permeability. 8.Corrosion resistance,use polypropylene or polyester, chemical fiber as raw material, acid and alkali resistance, no ...