PURPOSE: To provide a method and an apparatus for simply reducing a cost to continuously apply grit particles to a continuous web.

CONSTITUTION: To apply hot grit particles 2 to a continuous thermoplastic web 12 such a geonet or the like, the web is brought to the upper part of a surface of a roller 3 which is rotating in a container containing grit particles 2. A controlled layer of grit particles is carried up over an upper part of the roller, and the particles are heated by halogen emitters 10 and are pressed into the web. The particles cause local melting of the web so that the grit particles are embedded and firmly retained. Grit particles are added to a hopper 1b and the top surface of the mass of grit particles adjacent the ascending part of the roller surface is kept at a controlled level below the uppermost part of the roller. Surplus grit particles not taken up by the web are recirculated by interaction with the roller surface.