What are the different types of wood glue?

Wood adhesives are able to bind wood or other materials. Many different substances were historically used for joining wood, but these adhesives were made of natural materials until the end of the age of 20. Synthetic wood glue was introduced just after World War II and in modern times it exceeded the natural glue for wood binding.

Each specific wood glue can be placed in one of two different categories - natural and synthetic. Natural wood adhesives include animal, vegetables, casein, soy and blood glue. Synthetic wood adhesives include glue derived from oil, gas, coal and other synthetic resins. It must be applied to wood while it is hot, creating a strong bond when it cools and loses moisture. The wood must also be warm during application, or the adhesive can cool too quickly to allow a strong binding. The animal's adhesive has a very low blueness to oisture and the binding significantly weakens when it is exposed to highmoisture.

Vegetable adhesive, also known as starch -based adhesive, is made from starch obtained from corn, rice, potatoes or cassation. The vegetable adhesive can be applied to wood when it is hot or cold, and a binding is formed when the adhesive loses its moisture. The curing process can be very slow and often lasts at least 24 hours. After cure, the bond can be weakened by a high moisture content in the air.

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casein adhesive is made of milk or buttermilk that is dissolved in a chemical solvent. Casein adhesive is most often sold in the form of powder and must be combined with water to form a paste. The paste is applied to the wood and, like other natural adhesives, the binding is formed when the moisture evaporates. Casein has slight resistance to moisture, but can also lightly dye the wood.

soy and blood adhesive are simultaneous to other natural adhesids of wood. UseEspecially for bonding veneer and plywood. Blood adhesives are some of the few adhesives of natural wood that have strong resistance to moisture.

Synthetic wood adhesives, also known as resins, are polymers created by man that resemble natural resin, but are created to meet the specific needs of wood processing. They have excellent moisture resistance and create very strong bonds. Synthetic adhesives can be placed in one of two categories - thermoset and thermoplastic.

thermoset adhesives include urea-formaldehyde, phenol, resorcinol, melamine and epoxy. Urea is the most popular wood glue because it provides slight resistance to moisture and can treat in minutes at high temperatures. Phenol and resorcinol adhesives are expensive but universal and provide extremely resistant links. The melamine glue is rarely used separately, but must be combined with urea to increase moisture resistance. EpoThe xids are the most expensive thermoset adhesive and cheers usually impractical for wood processing projects on a large scale.

thermoplastic adhesives include polyvinylace and thermal hot melt. Polyvinylace adhesives are common white adhesives used in the wooden industry. Polyvinyl, sometimes referred to as "wood glue", has poor heat and humidity resistance, but is the simplest synthetic adhesives for use. Adhesives with thermal hot melting are solid adhesives, which must be heated and applied as drops or beads and for cooling the adhesive forms the bond. The main advantages of thermal adhesives are their ease of handling and fast curing time.