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A commercial application of fire retardants to dry-formed hardboardsAuthor(s): Gary C. Meyers; Carlton A. Holmes
Source: Res. Pap. FPL-RP-298. Madison, WI : U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 8 pages
Publication Series: Research Paper (RP)
Station: Forest Products Laboratory
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DescriptionBased on laboratory performance with a number of fire-retardant chemicals, disodium octaborate tetrahydrate-boric acid and dicyandiamide-phosphoric acid-formaldehyde were selected for treating fiber and making 4 foot by 8-foot dry-formed hardboards on a commercial production line. The boards were evaluated for performance under exposure to fire, strength, dimensional stability. and durability. Both treatment systems produced boards that met the acceptance flamespread criteria for Class B material. In a 25-foot tunnel furnace. The disodium octaborate tetrahydrate-boric acid gave the lowest smoke development index and resulted in the strongest and most stable boards. The treatments did not offer resistance to water leaching.
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CitationMeyers, Gary C.; Holmes, Carlton A. 1977. A commercial application of fire retardants to dry-formed hardboards. Res. Pap. FPL-RP-298. Madison, WI : U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 8 pages
KeywordsChemical treatments, hardboard, fire retardants, resins, phenolic compounds, tensile strength, accelerated aging, flammability, fire performance
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