Polymer composition comprising at least one thermoplastic polymer and fibres

A method of using fibres (B), having a fibre length l, in a polymer composition (PC) comprising at least one thermoplastic polymer (A), the method comprising using the fibres (B) for increasing the toughness and/or reinforcement of moulded articles made from said polymer composition (PC), wherein at most 10% by weight of the fibres (B), based on the total weight of the fibres (B), have a fibre length l of less than 100 μm, and at most 12% by weight of the fibres (B), based on the total weight of the fibres (B), have a fibre length l of less than 200 μm,

• wherein from 1 to 10% by weight of the fibres (B), based on the total weight of the fibres (B), have a fibre length l of less than 100 μm, and from 1 to 12% by weight of the fibres (B), based on the total weight of the fibres (B), have a fibre length l of less than 200 μm,
• wherein the polymer composition (PC) comprises in the range of from 50 to 75% by weight of component (A) and in the range of from 25 to 50% by weight of component (B), based in each case on the total weight of the polymer composition (PC), and
• wherein the at least one thermoplastic polymer (A) is a polyamide selected from the group consisting of polyamide 6 (PA 6), polyamide 66 (PA 66), polyamide 6/66 (PA 6/66), polyamide 66/6 (PA 66/6), polyamide 610 (PA 610), polyamide 6/6T (PA 6/6T), polyamide 6T/6I (PA 6T/61), polyamide 12 (PA 12), polyamide 4T (PA 4T), polyamide 9T (PA 9T), polyamide 46 (PA 46), polyamide 1010 (PA 1010) and polyamide 1212 (PA 1212).