Halogen free flame retardant polyester composition

A halogen free flame retardant moulding composition comprising (A) polymeric material, (B) a flame retardant system, (C) fibrous reinforcing agent and (D) a mould release agent, wherein

• (A) the polymeric material consists of at least 50 wt. %, relative to the total weight of the polymeric material, of a thermoplastic polyester;
• (B) the flame retardant system is present in an amount of 11-35 wt. %, relative to the total weight of (A), (B) and (C), and consists of:
• a) melamine cyanurate,
• and optionally one or more of the following flame retardant components:
• b) another phosphorus-free nitrogen based organic flame retardant compound,
• c) a phosphorus containing flame retardant excluding elementary phosphorus, in an amount of less than 1 wt. %, relative to the total weight of (A), (B) and (C):
• d) an inorganic flame retardant synergist, and
• e) an organic flame retardant synergist,
• (C) the fibrous reinforcing agent is present in an amount of 7-35 wt. %, relative to the total weight of (A), (B) and (C);
• and
• (D) the mould release agent is present in an amount of at least 0.01 wt. %, relative to the total weight of (A), (B) and (C).