Resin wood
Synthetic resin press wood (KP) is a wood-based material in which thin veneer wood is impregnated with synthetic resin , especially phenolic resin , and pressed at high temperatures to form panels or other semi-finished products . It is one of the laminates . Synthetic resin plywood is defined by DIN 4076 and technically described according to DIN 7707. In addition to the bi-directional veneer layers known from plywood (fiber direction of the veneer layers alternating lengthways and crossways), there are also unidirectional (plywood) and other fabrics for special applications.
history
Synthetic resin pressed wood developed from the pressed wood or pressed solid wood, which has been known since 1915 , in which one or multi-part, highly compressed wood blocks were created under pressure. This material is known and used under the trade names Pagholz , Delignit , Panzerholz , Dehonit , Lignostone and Werzalit to this day. By pressing veneers, the effects of wood defects such as knots, which only affect one layer of veneer when properly constructed, can be largely eliminated. In addition, the shrinkage and swelling dimensions are drastically reduced.
The main manufacturer in the USA was Rutland Plywood .
construction
The carrier material for the synthetic resin plywood is made of beech veneers ( Fagus sylvatica ). This wood is impregnated with phenolic resins, a distinction being made between an application resin surface treatment (glued types) and an impregnation resin impregnation (impregnated types).
use
The material is mainly used in furniture construction and interior construction, further areas of application can be found in vehicle construction (e.g. as flooring for loading areas in vans and trucks, wagon construction) and tool construction as well as in the production of industrial floors. Special applications include e.g. B. burglar-proof windows, bulletproof wooden constructions and applications in model and mechanical engineering. A group of synthetic resin pressed wood is used in transformer construction due to its insulating properties. Applications in musical instrument making are reed blocks of pianos and harps as well as guitar necks.
literature
- Wilbrand Woebcken, Wilhelm Adam, Dietrich Braun: Duroplasts. Kunststoff-Handbuch Vol. 10, Hanser Verlag 1988.
Individual evidence
- ↑ Pagholz Formteile GmbH
- ↑ Blomberg wood industry
- ^ Deutsche Holzveredelung Schmeing GmbH
- ↑ Roechling Lignostone
- ↑ Werzalit
- ^ Rutland Plywood Corporation
- ↑ Reliable even after 30 years: Technical values of insulation components made of Lignostone® Transformerwood® tested ( Memento from June 8, 2016 in the Internet Archive ), July 20, 2015