Patent ID: 8043384
Filing Date: 2011-10-25
Classification: C09K,D21C,D21H,Y02W,Y10T

Abstract:
1. A method for making fire retardant fibers comprising the steps of: a. introducing one or more fiber feedstocks to a blend tank, wherein each of the one or more fiber feedstocks has a basic structure, and wherein at least one of the one or more fiber feedstocks includes a bonding agent; b. adding a fire retardant chemical to the blend tank, wherein the fire retardant chemical is a combination of boric acid and borax in liquid form selected to improve the solubility of each of the boric acid and the borax and thereby provide effective attachment of the boric acid and the borax on and into the basic structure of the one or more fiber feedstocks; c. retaining the one or more fiber feedstocks and the chemical in the blend tank for a period of time sufficient to provide effective attachment of the boric acid and the borax on and into the basic structure of the one or more fiber feedstocks; d. then drying the fibers of the one or more fiber feedstocks to form a chemically treated pulp cake; and e. fluffing the pulp cake to form the fire retardant fibers.