초록 ▼

A method for making fire retardant material including fire retardant cellulosic insulation is described. The method includes an arrangement for adding one or more feedstocks and a fire retardancy chemical compound to a common blend tank prior to feedstock drying. The one or more feedstocks may inclu

A method for making fire retardant material including fire retardant cellulosic insulation is described. The method includes an arrangement for adding one or more feedstocks and a fire retardancy chemical compound to a common blend tank prior to feedstock drying. The one or more feedstocks may include at least one virgin pulp stock feed and at least one recycled material stock feed. The amount and type of both the virgin feedstock and the recycled material feedstock is selectable. Old newsprint (ONP) may be one type of recycled material feedstock. Another suitable type of recycled material feedstock is old corrugated containers (OCC). The method further includes retaining the fiber feedstock and the chemical compound together for enough time to ensure adherence or impregnations of enough of the chemical to the fibers after the drying process. Fluffing or fiberizing of the treated fibers may be accomplished under less severe conditions than ordinarily employed when making conventional cellulose insulation.

대표청구항 ▼

What is claimed is: 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 bondin

What is claimed is: 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; ande. fluffing the pulp cake to form the fire retardant fibers.