Patent ID: 7981232
Filing Date: 2011-07-19
Classification: B01D,D02G

Abstract:
1. Method for winding textile threads to filter bobbins for filtration purposes of petrochemicals, characterized by winding onto a hollow and perforated cylinder core, in a first operation, 4 layers laid at 30 degrees both ways, in a second operation, winding 5 layers laid at 40 degrees both ways, in a third operation, winding 9 layers laid at 35 degrees both ways, in a fourth and last operation, winding 12 layers laid at 15 degrees one way and just with 50 degree transfer back for each layer, and repeating the first, second, third and fourth operations, the threads used thereby comprising 58% cotton fibres, 16% acrylic fibres, 11.5% flax fibres, 11.5% polyester fibres, 2% polyamide fibres, 0.6% cellulose acetate fibres and 0.4% viscose fibres.