Palkokäsittely

Palkokäsittely refers to the process of applying a chemical treatment to wood to enhance its properties and durability. This is often done to protect the wood from decay, insect infestation, and fire. The most common method involves impregnating the wood with a preservative solution under pressure. This forces the chemicals deep into the wood's structure, providing long-lasting protection.

Various chemicals can be used in palkokäsittely depending on the desired outcome. Copper-based compounds, such as copper sulfate or copper azole, are widely employed for their effectiveness against fungi and insects. Boron compounds are another option, particularly for protecting wood used in inland environments. For fire resistance, specific fire retardants are incorporated into the treatment process.

The palkokäsittely process typically involves placing the wood into a large, sealed cylinder. The cylinder is then filled with the preservative solution, and pressure is applied. This pressure differential drives the chemicals into the wood. After the pressure treatment, a period of drying or steaming may follow to set the chemicals and remove excess moisture.

Treated wood is commonly used in outdoor applications where it is exposed to the elements and potential threats. This includes construction materials like poles, posts, decking, and fencing. The increased lifespan and resistance to degradation offered by palkokäsittely make it a cost-effective solution for many structural and decorative wood applications, contributing to sustainable forestry practices by extending the usable life of timber.