Fire-retardant cellulose insulation and process for making same
AssigneeWhite-Bird Enterprises, Inc.
InventorsThomas O. Bird, Jack White, Carl H. Bird
Life of this patent
Estimating the term…
Abstract
A fire-resistant, cellulose insulation and method, the cellulose insulation including a predetermined quantity of talc to impart the desired degree of fire-resistant characteristics to the cellulose. If desired, limited quantities of boron compounds can be added with the talc. The method includes directing ground cellulose from the primary grinding stage into a surge bin to accommodate metering the talc with the cellulose to thereby assure the appropriate distribution ratio of talc in the cellulose.
Claims13
A fire-resistant, cellulose insulation consisting of a finely divided cellulose intimately mixed with talc, the talc being present in an amount within the range on the order of about 5% to 25% by weight.
A fire-resistant, cellulose insulation comprising a finely divided cellulose intimately mixed with talc, the talc being present in an amount within the range on the order of about 5% to 25% by weight and wherein a boron compound is added to the talc in amounts ranging up to 10% by weight.
A method for producing a fire-resistant, cellulose insulation comprising:
- grinding a cellulose raw material in a first grinding stage;
- imparting a fire-resistant characteristic to the cellulose with an inorganic material consisting of talc by mixing the talc with the ground cellulose;
- and
- finely grinding the cellulose and talc mixture thereby providing a substantially uniform distribution of the talc throughout the cellulose.
A method for producing a fire-resistant, cellulose insulation comprising:
- subjecting a cellulose material to an initial grinding step;
- introducing the ground cellulose into a surge bin to accommodate a controlled processing of the ground cellulose;
- mixing talc with the ground cellulose in an amount within the range on the order of about 5% to 25% by weight talc to ground cellulose;
- adding a boron compound to the talc in amounts ranging up to 10% by weight;
- and
- blending the talc and boron compound with the cellulose by subjecting the talc, boron compound and cellulose mixture to additional grinding.
Dependencies are inferred from the claim text.