Patent ID: 9045845
Filing Date: 2015-06-02
Classification: B05D,D02G,D10B

Abstract:
1. A process for manufacturing a composite yarn, comprising: subjecting a continuous yarn, obtained by spinning a large plurality of fibers made of an organic material or silica or glass, to a process for mechanically opening the yarn by splaying, to uniformly spread out and separate the fibers, including inner layers of the fibers, without impairing functional properties of the yarn; coating the fibers with a primary coating consisting of plastisol that consists essentially of a dispersion of a chlorinated polymer material selected from the group consisting of polyvinyl chloride, superchlorinated PVCs, polyvinylidene chlorides, and chlorinated polyolefins, a plasticizer, and a fire-retarding filler, the coating having a viscosity between 1000 and 2000 mPa·s measured at 25° C. using a Brookfield RVT viscometer at 20 rpm with a No. 4 spindle, simultaneously with or after subjecting the continuous yarn to the process for mechanically opening the yarn by splaying; and forming a composite yarn having a circular cross-section and uniformly distributed fibers throughout the cross-section of the polymer material to limit desheathing of the yarn.