Parquet flooring, regardless of its type—two- or three-layer—is subject to stringent requirements. Since parquet flooring must be a single piece, the adhesive used in its production must meet all requirements:

• High moisture resistance
• Durability – no delamination of the fugue
• High heat resistance, for example in the presence of underfloor heating
• Balancing the properties of wood: swelling and contraction caused by the seasons and underfloor heating
• Resistance to household solvents

In the production of three-layer parquet, polyvinyl acetate-based adhesives are used, such as the Kleiberit 304.4 EPI system, as well as one-component polyurethane adhesives (1K-PUR) such as Kleiberit 501.0. In the production of two-layer parquet, the reactive polyurethane hot-melt adhesive PUR Kleiberit 705.7 is increasingly used.

Reactive PUR hot melt adhesives melt at 120°C – 150°C and are applied to the substrate or top layer in a caterpillar-shaped pattern. Processing options include accelerated cycle, continuous flow, and press-based gluing of boards into blocks.

One-component polyurethane adhesives are used for the production of two- and three-layer parquet flooring. Adhesive application is done manually or using a caterpillar-type adhesive applicator. Pressing is done in a block press (cold pressing) or a multi-span press.