Twisted Polypropylene Fibers for Tunnel Linings

Polypropylene twisted fiber, commonly known as hinge fiber or mesh twisted fiber, is made from polypropylene and forms a three-dimensional hinge structure through the twisting of individual fibers.It features a unique interlocking hinge structure, forming a three-dimensional network. Its crack-resistance effect is far superior to that of monofilament polypropylene fibers.

Multiple European countries have standardized the use of twisted polypropylene fibers for shotcrete tunnel linings.Compared with ordinary monofilament fibers, the hinged mesh structure delivers superior dispersion performance in wet-mix shotcrete, with remarkable advantages in impact resistance and impermeability.