1. What is Particle Board?
Particle board (PB), also known as chipboard, particleboard or Okal board.
PB is a wood based panel with wood chips, adhesives and other components (paraffin, hardener …) pressed under high temperature and pressure.
2. History and development
PB is derived from Germany. In 1932, in a factory in Bremen Germany, an inventor, also a pilot of German air force fighter called Himmelheber, invented PB. The first PB was made from wood chips, shavings, sawdust, engrained by a special glue.
However, until after 1945, the wood chip industry began to develop.
The industry firstly happened in Germany, then spread to Switzerland, England, France, Belgium, Holland, Austria, Italy and Finland. Europe accounts for more than two-thirds of the total world production of PB.
3. Components of PB
Normally, PB consists of about 80% wood, 9-10% Urea Formaldehyde glue (UF), 7-10% water and less than 0.5% other components (paraffin, hardener …). In order to enhance the moisture resistance of the board, Melamine is often added to UF glue (also called MUF – Urea Formaldehyde modified by Melamine). To enhance the fire resistance of the board, gypsum and cement are sometimes used as adhesives.
Raw materials are wood from eucalyptus, acacia, rubber tree or waste wood during processing (corn cover, chips, sawdust …). Besides wood, plants that contain lignin and cellulose can also be used, such as straw, bagasse, cottonwood, flaxseed or hemp.
4. Physical Characteristics and General Features
– Generally, PB has the color of wood (yellow, brown). The color of moisture resistant boards is green and of fire-resistant boards are red.
– PB is stable and inert as a sheet. The board is biodegradable over time.
– PB is odorless.
– PB have an average density of 680 – 750 kg/m3.
– Standard size of PB is 1220 x 2440 and 1830 x 2440 (mm).
– Typical thickness of PB: 17, 18, 25 (mm).
5. The manufacturing process of PB
Wood chips, adhesive and other components (paraffin, hardener …) are pressed under high temperature and pressure.
Process of PB production:
– Wood is chopped into small chips.
– Wood chips are dried out at the specified temperature.
– Sifted and sorted the wood chip into different sized chips.
– Mix them with adhesive and then transferred to the former.
– The boards are formed according to the board thickness and density.
– After shaping, the boards are preliminarily pressed and cut to required lengths with matched cutter.
– Hot press: board is pressed under high temperature and pressure.
– Trim the boards into sides to eliminate edge errors.
– Smooth the surface and to test the quality of board’s surface.
– Have a lower cost than MDF or plywood.
– Due to the structure of wood chips, PB hardness and mechanical durability are quite high.
– To be able to screw good.
– The surface of the PB is relatively flat, so it is easy to laminate decorative surfaces such as Melamine or Laminates.
– Compared to other industrial boards, the load capacity of PB is lower.
– Due to the structure of the wood chips, when cutting boards, cutting edges are often chewed.
– The using time of PB furniture is generally shorter than that of other wood based composites.
PB is usually covered with decorative surfaces for interior applications such as furniture, cabinet, bed and so on.
Used as partition, construction boards …
In addition, PB is also used to make pouring concrete.
Video: Manufacturing process of PB