Effects of adhesive formulation and age on strength of bonded butt joints
U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1967 - House & Home - 16 pages
Effects of formulation and age of adhesive on joint strength were studied on butt joints of slash pine bonded with an epoxy-resin adhesive. The rigid form of adhesive was changed to a ductile one by adding an elastomer which increased strength, efficiency, and quality of bonded joints. Increased adhesive age reduced joint strength for both rigid and ductile forms. (Author).
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1nteraction adhesive age adhesive film adhesive formulation adhesive penetration adhesive viscosity adhesive-bonded joints available for strength average depth basic epoxy resin Batches of adhesive bonded joints butt joints depth of adhesive difference in strength ductile adhesive group ductile form earlywood and latewood effect of adhesive elastomer epoxy-resin adhesives Error for testing fabricated from separated failure filled with adhesive Forest Products Laboratory FORMULATION AND AGE glueline interface intrinsic strength joint assembly Joint fracture occurred joints bonded joints fabricated joints of slash latewood joints latewood specimens level of efficiency lowest number N.S. Not significant number of cells Number of specimens percent level rigid adhesive group slash pine joints Solid wood specimen Source Degrees squares Mean squares strength and efficiency strength of butt strength of wood stress raisers substrate structure tensile strength three viscosity levels U.S. Forest Service variance of tensile viscosity class wood structure wood surface wood type Error