Phenol-formaldehyde is a type of synthetic resin created by combining phenol and formaldehyde. This material is known for its strong adhesive properties and is commonly used in the production of various products, including plywood, particleboard, and laminates. It is valued for its durability, heat resistance, and ability to bond well with other materials. The manufacturing process involves a chemical reaction between phenol and formaldehyde, which can be adjusted to create different types of resins. These resins can be further processed to enhance their properties, making them suitable for a wide range of applications in construction, automotive, and household products.