Accession Number : AD0259053

Title :   POLYMERIC COMPOUNDS TO IMPROVE THE FASTENING STRENGTH OF WOOD WITH WOOD FASTENERS

Corporate Author : NAVAL APPLIED SCIENCE LAB BROOKLYN N Y

Personal Author(s) : RICHOLSON,J.M.

Report Date : 05 AUG 1960

Pagination or Media Count : 1

Abstract : Three polymeric compounds were evaluated and compared with beeswax as a coating for steel screws used as fasteners for wood joints: (1) a moderately viscous polyester; (2) a moderately viscous epoxy; and (3) a free flowing epoxy. The results indicated that the polymers increased the holding power of the screws in 4 kinds of wood (cypress, Dougxlas fir, teak, and white oak) from about 10 to 50%. The increase in holding power in plywood and particle board was about 20 to 40%, respectively. The corrosivity of the 4 woods was decreased about 65 to 95% when epoxy polymers were used. A significant decrease in driving resistance was obtained by the use of the epoxy based polymeric compounds.

Descriptors :   *POLYMERS, *WOOD, BEESWAX, CHEMICAL REACTIONS, DECOMPOSITION, DEGRADATION, EPOXY RESINS, ESTERS, FIBERBOARD, IMPREGNATION, JOINTS, LUBRICANTS, LUBRICATION, PLYWOOD, PRESERVATION, SCREW THREADS

Distribution Statement : APPROVED FOR PUBLIC RELEASE