Pellet transportation system and methods for use thereof

A method for reducing an amount of glass filaments separating from pellets comprising a thermoplastic polymer sheath intimately surrounding the glass filaments, which glass filaments are covered at least in part with an impregnating agent and extend in a longitudinal direction of said pellets, when such pellets are subjected to repetitive mechanical loads in or on a pellet transport system comprising at least one of a piping system and a vibrating conveyor belt, the method comprising:

• a) providing at least one continuous strand of glass filaments containing at most 2 wt % of a sizing composition based on the total weight of the glass filaments, and
• b) applying from 0.5 to 20 wt %, based on the weight of the glass filaments in the pellets, of an impregnating agent to said strand,
• c) applying a sheath of thermoplastic polymer around the strand of step b) to form a sheathed continuous strand of glass filaments covered at least in part with said impregnating agent;
• and
• d) cutting the sheathed continuous strand of glass filaments covered at least in part with said impregnating agent to pellets having a length of at least 13 mm.