Patent ID: 7442333

Claim:
A method for the production of a polyamide nano-composite made from at least one polyamide base polymer and an organically-modified phyllosilicate in a double-screw extruder with a front-feeder and a side-feeder, wherein a portion (A) of from 8 to 15 wt. % of a granulate of the base polymer, based on 100% by weight of the nanocomposite, is introduced in a dosed manner in the front-feeder of the double-screw extruder; and a main portion (B) of said granulate of the base polymer is introduced through the side-feeder of the double-screw extruder; wherein 2 to 8 wt. %, based on a total of 100% by weight of the nanocomposite, of the organically-modified phyllosilicate is introduced in a dosed manner by gravity and without the use of a side-feeder into the melt of the granulate portion (A) of the base polymer; wherein an E or F extruder screw with screw regions K, L, and M is used, the screw region M comprising at least one conveying retarding mixing element; wherein the melt of the polyamide nanocomposite is subjected to a pressure of less than 200 mbar within the double-screw extruder; and wherein a film made of this polyamide nanocomposite has a film note (FN) of less than 10.