Patent ID: 7662474
Filing Date: 2010-02-16
Classification: C09K,D06M,D06N,E06B,Y10T

Abstract:
1. A flame-retarded composite yarn comprising a core and a plastic sheath comprising a halogen-free fire retarded composition, consisting of at least one acrylic resin and an intumescent agent that are dispersed in a plasticizing medium, obtained by the process wherein: a) a die suitable for passage of the core of said yarn is used; b) the plastic sheath comprising a halogen-free fire retarded composition is used in an ungelled plastisol state; c) the core of the yarn is passed through said die, with a peripheral distribution of the plastisol around said core; d) rheological properties of the plastisol at a shear rate of the die, at least equal to 20,000 s e) the gelling of the fire-retarded composition is carried out, wherein the plastic sheath is halogen free.