Chipboard (GOST STB 1348-2009), code according to Harmonized Commodity Description and Coding System – 4410.Raw materials complying with FSC are used in the production process
Thickness range 6-40 mm;
Height range from 2,440 to 3,660 mm;
Formaldehyde emission class – Е1 (5.5 – 6 mg/100 g);
Density range 620-740 kg/m3;
Average density of 16 mm thick board is 650 kg/m3.
Chipboard is the most popular material for furniture production. The main advantage of chipboards is their resistance to mechanic damage, water resistance and simple mechanic processing. This material is easily sawn and drilled; it can be milled, sliced, painted and glued. Apart from that, the cost of chipboard is quite low. Chipboards are produced by means of high-temperature pressing of saw dust and wood chips. Almost any type of coniferous and deciduous wood can be used to produce chipboards. The availability of hydrophobizating, antiseptic and other additives ensures the durability and the long life of the material.
The first stage of chipboard production is raw material processing. Round wood is used as the raw material. During the second stage the wood chips are sorted, cleaned and dried. Next, the resin and the wood chips form the so-called “carpet” which is pressed and a board is produced. After that, the edges of the board are processed and the boards are finished in several ways – by sanding and coating (laminating).
The grade of the chipboard is determined according to the quality of surface processing. The first-grade board must be sanded and have no scratches, shear and other mechanic defects; the edges have to be smooth. The first-grade chipboards are used to produce furniture. The first-grade chipboards are mandatorily checked for the amount of formaldehyde. Only chipboards with safe amount of this substance can be considered environmentally friendly. Formaldehyde emission level is determined using the so-called “chamber” method. The idea of this method is to measure the level of this harmful substance in the air of the chamber where a piece of sanded chipboard has been placed. This method is most common and is considered most effective. Modern methods of production ensure the production of sanded chipboards with much lower level of formaldehyde than the specified maximum acceptable concentration. In this respect chipboards can be considered safe for health.