Plywood resin is a type of glue that is used to bond the layers of wood veneer together to make plywood. Plywood resin can have different properties and qualities depending on the type of plywood and the intended use. Some common types of plywood resin are:
Phenolic resin: This is a synthetic resin that is made by combining phenol and formaldehyde under acidic conditions. It is also known as phenol formaldehyde or PF. Phenolic resin is often used for making exterior plywood, structural plywood, or marine plywood. It has a dark color and a high bonding strength. It can withstand harsh weather conditions and prevent fungal and borer attacks. However, it also requires high temperature and pressure to cure, and it can be toxic if not used in a well-ventilated area.
Urea formaldehyde resin: This is a synthetic resin that is made by combining urea and formaldehyde under alkaline conditions. It is also known as urea formaldehyde or UF. Urea formaldehyde resin is often used for making interior plywood, such as furniture, cabinets, or flooring. It has a light color and a low cost. It can resist moisture and humidity to some extent, but it is not waterproof. It also emits formaldehyde gas, which can cause health problems if inhaled.
Melamine urea formaldehyde resin: This is a synthetic resin that is made by combining melamine, urea, and formaldehyde under alkaline conditions. It is also known as melamine urea formaldehyde or MUF. Melamine urea formaldehyde resin is often used for making moisture-resistant plywood, such as exterior plywood, laminated plywood, or flooring. It has a light color and a moderate cost. It can resist water and weather better than urea formaldehyde resin, but it is not as durable as phenolic resin. It also emits less formaldehyde gas than urea formaldehyde resin.