To provide a simple, cost-reduced method for applying grit particles to a continuous web.

In order to apply heated grit particles 2 to a continuous thermoplastic web 12 such as a geonet, the web 12 is brought to the upper part of a roller 3 which is rotating in a container containing the grit particles 2. The controlled layer of the particles 2 is carried up over the upper part of the roller 3, and the particles 2 are heated by halogen emitters and pressed into the web 12, causing local melting of the web 12 so that the particles 2 are embedded and firmly retained. The particles 2 are added to a hopper 1b, and the top surface of the mass of the particles 2 adjacent to the ascending part of the roller surface is kept at a controlled level below the uppermost part of the roller 3. The residual particles 2 which were not taken up by the web 12 are recirculated by interaction with the roller surface.