Layered wood material, hot-pressed under high pressure, made of beech or birch veneers coated with special phenolic resins. Thin veneer sheets are soaked with resin which penetrates the cellular structure of wood. Then, it is hardened when pressed at a high temperature. Therefore, the produced material has much better physical and mechanical properties than the input wood.
It is a specially engineered, extremely hard and durable wood composite with highly unique mechanical and performance properties. The exceptional structure of the compreg also provides protection from radiation which is used for medical and military purposes. However, the compreg is not only suitable for industrial purposes. Despite its hardness, it is relatively easy to machine and therefore its is used for the production of various wooden consumer goods.
Types of gluing
- interior: Sheet Compreg It is an engineered wood composite produced by the hot bonding under high pressure of 0.8 mm thick beech wood veneers with a phenol-formaldehyde adhesive in a water solution. Depending on the arrangement of fibres in the adjacent plies, we manufacture cross-grained sheet compreg (the adjacent plies are laid perpendicularly against each other) and the parallel-grained reinforced sheet compreg (fibres of consecutive veneers are laid in the same direction, except several plies laid perpendicularly to strengthen the entire board). What is interesting is that, contrary to ordinary plywood materials and intuitive believes, the reinforced parallel-grained compreg also has better mechanical properties than the cross-grained compreg. This results from the fact that compreg boards are pressed in course of the moulding process under very high pressures up to 20 MPa and the cross-grained structure makes it not so easy to compress the fibres while pressing as is the case with the parallel-grained arrangement.
- exterior: Self-lubricating Compreg It is an engineered wood composite produced by the hot bonding under high pressure of 0.6 mm thick beech wood veneers coated with an adhesive containing phenol resin with additions including machine oil. It is used in environments where it is necessary to reduce friction, e.g. of machine shaft shells. It is manufactured in two variants: the cross-grained design and the reinforced parallel-grained design.