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    Current Investigations of the Durability of Woodworking Adhesives

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    Factors that influence the deterioration of glued joints in wood include mechanical stresses, as a result of dimensional changes in the wood, moisture, heat, and microorganisms. Presently available methods for evaluating the permanence of glued wood joints include long-term exposures to controlled laboratory conditions and to weathering, actual service tests, and accelerated permanence tests. The advantages and limitations of each of these methods are discussed and applications of each method are illustrated. It is recognized that the most reliable procedure for evaluating such permanence is actual service experience. The problems of developing adequate data from such experience and in correlating the results of other types of tests with such service data are discussed. Accelerated tests are much desired, but the usefulness of present methods are limited by lack of adequate information on correlation of such tests with service and other long-term test experiences.

    Author Information:

    Blomquist, R F
    Chemist, Forest Products Laboratory, maintained at Madison, Wis., by the Forest Service, U. S. Department of Agriculture, in cooperation with the University of Wisconsin,

    Committee/Subcommittee: D14.30

    DOI: 10.1520/STP44030S