Mar 01, 2021
Falsa
Core material with fiber orientation preferably perpendicular to the panel plane
Development of a new lignocellulosic sandwich material
with reduced material usage and associated manufacturing process
| Duration | 03/2021 - 09/2024 |
| Funded by | BMEL/ FNR |
| Funding reference number | 2220HV047A |
| Contact | |
| Keywords | Sandwich panel, core material, homogeneous supporting material, thinnest surface layers |
The aim of the project is to develop new, lightweight wood-based panels that are nevertheless very stable. To achieve this, wood fibers are aligned so that they are perpendicular to the surface of the board - like bristles in a brush. The special thing about this is that very thin surface layers can be used without the board losing any of its strength. The new boards are lighter, more stable and can be processed more easily, for example in furniture construction.
The aim of the project is to develop an innovative wood-based sandwich material with significantly reduced material usage. A clever reorientation of the wood fibers - perpendicular to the board plane - creates a particularly homogeneous and stable support structure. The tests show: The new material core (density approx. 100 kg/m³) achieves four times the compressive strength of conventional wood fiber insulation material. This means that extremely thin surface layers (< 2 mm) can be stably supported. In combination with an HDF top layer of only 1.6 mm, the sandwich panel (transverse to the direction of manufacture) already achieves the flexural strength of a conventional chipboard - with a significantly lower weight.
Drehvorrichtung zur Kernschichtbildung
The focus is on the process engineering development for core and sandwich panel production. The starting material is a wood fiber insulating material, which is cut into strips (corresponding to the desired core thickness) at right angles to the fiber orientation, rotated by 90° and re-glued on the narrow sides. The resulting core material has an anisotropic structure with optimized compressive strength . In combination with thin HDF face sheets (< 2 mm), a fully supported sandwich structure without telegraphy effects is created. The improved shear and bending stiffness predestines the material for lightweight, flat components < 25 mm total thickness with simplified edge and fitting processing.
Partner
- G. Kraft Maschinenbau GmbH (formerly Becker Sonder-Maschinenbau GmbH)
- STEICO SE (Associated partner)
Funding reference
