Wood chipboard is an indispensable element of construction

Wood-particle board has found wide distribution in the modern world, and in particular in construction. It remains an indispensable component of the production of doors and window-sills, serves as a basis for the finishing of walls, ceiling and floor coverings.

Plate chipboard is a pressed sheet of wood chips and glue. The sawdust mass is connected as a result of the hot pressing process. This ensures reliable connection of components in a single unit. The glue used for these purposes has a specialized formulation based on formaldehyde and additional additives.

Each chipboard is assigned to a group in the general classification. Distinguish DSP by the method of manufacture and the nature of pressing, the composition of the adhesive, the type of wood from which the chips are obtained, the type of lining and some other parameters.

The quality of the chips used directly affects the quality and characteristics of the chipboard. For example, from wood raw material, which has the form of a flower petal, is obtained a chipboard, which has greater strength and resistance to impacts. But the shape of the square, on the contrary, makes it sufficiently fragile and poorly resisting bending influences. When using such raw materials, the manufacturer must increase the amount of resin to provide the necessary quality characteristics. However, this significantly increases the negative impact on the environment through the removal of toxic formaldehyde.

The modern firm-manufacturer is able to produce chipboard of two brands: P-A and P-B. Wood chipboard of the first type is characterized by significant strength indicators, including tensile and bending effects, as well as insignificant indicators for the following values: deformation, roughness and propensity to swell. At the same time, plates of the P-B brand have slightly worse indicators than the DSP grade P-A.

At present, I and II grade boards are produced, as well as substandard ones. The particle board is assigned to one of these groups, depending on the quality characteristics that the surface layer possesses. In order to meet all the requirements of Class I, the chipboard should have an almost absolutely flat surface, there should not be any scratches and stains on it. There are no chips at the edges. II grade allows small defects, such as insufficiently thorough grinding (up to 10% is allowed), different chips at the edge along the width and length. In the manufacture of a Class II plate, a large percentage of the bark and large chips in the mass of the feedstock is possible.

The chipboard can also be used in rooms with high humidity. However, for this, the molten paraffin or paraffin solution must be added to the feedstock, which will increase the resistance of the material to moisture. Otherwise, it will accumulate, which subsequently leads to swelling and deformation of the plate.