Finger-joint adhesives

Cold-Setting Glulam Finger-Jointing Adhesives... 

Figure 13. Contactless application of EPI for gluing of finger joints. Adhesive ribbons on the tips of the fingers are applied without contact between the application head and the wood fingers.

Kreibich R E, Hemingway R W (1989) Tannin-based, wood finger-jointing adhesives. In Hemingway R W, Conner A H (eds) Adhesives from renewable resources. ACS Symp Ser Washington DC 203-216... 

Plywood requirements—includes wood species used, synthetic repair requirements, veneer grades, veneer layers and thicknesses, panel grades with respect to end-use, adhesive bond requirements, panel constmetion and workmanship, scarf and finger-jointed panels, dimensional tolerances, moisture content, and packaging and loading... 

Tannin-Based Adhesives for Finger-Jointing Wood... 

Wattle tannin resins are also used to manufacture other resins, such as foams comparable to phenolics, as waterproofing additives, and binders for corrugated cardboard or charcoal briquettes. This discussion, however, deals only with particleboard, plywood, glulam, and finger-jointing exterior-grade wood adhesives. Formulations of the adhesives will be mentioned ad hoc, if at all necessary, as they have already been extensively discussed in articles and reviews in the relevant literature.(7)... 

Steele, P.H. R.E. Kreibich P.J. Steynberg R.W. Hemingway. Finger jointing green southern yellow pine with a soy-based adhesives. Adhes. Age 1998, 41, 49-56. 

EPI, Emulsion Polymer Isocyanate, MDI, pMDI, wood adhesives, solid wood panel, parquet, window frame, furniture, plywood, finger joint, glulam beam, I-betim, cross-laminated timber... 

A wide range of EPI adhesive systems are approved for production of posts for the Japanese market. In North America EPI adhesives for structural applications are mainly used for I-beams and finger joints. In Europe EPI adhesives are used for finger joints, I-beams, and glulam beams. There is only one EPI adhesive approved for production of glulam beams in Europe [27]. 

MUF honeymoon adhesive systems for bonding of timber of high moisture content (wet gluing) to produce laminated wood (glulam) and finger-jointing are composed of two components (1) a MUF resin at a pH of approximately 10 with no fillers added, and (2) a low pH aqueous solution of carboxymethylcellulose and formic acid lacking resorcinol in the system (82-85). 

Standards covering adhesives for various end-glued (finger-jointed), edge- and face-bonded joints. 

D-3110. Specification for Adhesives Used in Nonstructural Glued Lumber Products. Employs the D-0905 block shear test and a finger joint test, along with several exposures, to evaluate interior and semi-exterior adhesives, in end, edge and face bonded joints, especially for the molding and millwork field. Most of the applicable adhesives are based on polyvinyl acetate. 

Structural Adhesives for Fingeijointing Lumber. A recent standard detailing the testing of finger joints when used as end joints in structural glued, laminated timbers (see also D-2559 in wood adhesive specifications). 

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