Hard fibreboard
Hard fibreboard is a board-shaped material with thicknesses of up to 8 mm and a density ≥ 900 kg/m³, which is made from lignocellulosic fibres (e.g. wood, straw, bagasse, etc.). The production is mainly carried out by the wet process, i.e. with a fibre moisture of more than 20% at the plate forming stage, using heat and pressure. Plates manufactured in this way have a production-related screen mark on the back, whereas boards after the drying process have smooth surfaces on both sides. The binding is largely achieved by felting the fibers and adding small amounts of a binder. The properties can be improved by suitable additives (e.g. hydrophobic agents, antifungal agents, fire retardants, etc.) and follow-up treatments. Due to their viscoelastic behaviour, the panels can be bent up to a radius of about 25 cm during processing.
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☛ Datasheet Hard Fibreboard - dataholz.eu
Medium Density Fibreboard (MDF)
MDF is produced using the dry process with the addition of a synthetic binder. The boards are differentiated according to the bulk density range: high-density fibreboard (HDF) with a density ≥ 800 kg/m³, lightweight MDF (L-MDF) with a density ≤ 650 kg/m³ and ultra-light MDF (UL-MDF) with a density ≤ 550 kg/m³. The boards can be given further properties, e.g. fire protection, moisture resistance, resistance to biological infestation, etc., by changing the composition of the synthetic binder or by adding other additives. A special form of MDF is the vapour-permeable fibreboard. Moisture easily escapes through the diffusion-open panel into the open air. Two- or four-sided tongue-and-groove profiling makes it easier to lay the panels.
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☛ Datasheet Medium Density Fibreboard - dataholz.eu
Medium Hard Fibreboard
The medium-hard fibreboard with a density of 400 kg/m³ to 900 kg/m³ is made from fibres (e.g. wood, straw, bagasse). Only high-density panels ≥ 560 kg/m³ are suitable for construction purposes. The production is mainly carried out using the wet process. Plates made in this way have a screen mark on the back, whereas boards after the drying process have smooth surfaces on both sides. The binding is largely achieved by felting the fibers and adding small amounts of a binder. The properties can be improved by additives (e.g. hydrophobic, antifungal, fire retardants) and after-treatments.
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☛ Data sheet medium-hard fibreboard - dataholz.eu
porous fibreboard
The porous (also soft) wood fibreboard is often used as a sound and insulation board, as it has thermal and acoustic insulation properties. It is tested by the wet process, i.e. with a fibre moisture of more than 20 % at the plate forming stage, under the application of the
