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Wood glue is an adhesive used to tightly bond pieces of wood together. Many substances have been used as glues. Many substances have been used as glues. Traditionally animal proteins like casein from milk or collagen from animal hides and bones were boiled down to make early glues.
~4 hours for softwood, 8 for hardwood; must be under pressure for >0.5-2 hrs tensile strength exceeds most woods, 2,200-3,00 pounds per square inch water-resistant, depending on alkalis used Woodworking, paper glue, fireproof laminates Medieval or earlier Soybean glue: As for casein glue, but using soy protein Soy protein is mixed with alkalis
Glulam brace with plates used for connections Glulam frame of a roof structure. Glued laminated timber, commonly referred to as glulam, is a type of structural engineered wood product constituted by layers of dimensional lumber bonded together with durable, moisture-resistant structural adhesives so that all of the grain runs parallel to the longitudinal axis.
The invention of laminated veneer lumber as known today can be attributed to Arthur Troutner. While glue laminated wood veneers were in use since the middle of the 19th century on a small scale for furniture and pianos, Troutner was the first to develop a laminated veneer lumber of a scale large enough to be used in construction.
Plywood for indoor use generally uses the less expensive urea-formaldehyde glue, which has limited water resistance, while outdoor and marine-grade plywood are designed to withstand moisture, and use a water-resistant resorcinol-formaldehyde or phenol-formaldehyde glue to prevent delamination and to retain strength in high humidity. [17]
For example, if you are trying to get super glue off your gorgeous hardwood floors and you opt to use acetone—one of the more popular solutions—you could end up removing your finish too.