Particleboard And High-Moisture-Resistant Particleboard
Particleboard is a wood-based product used as a substrate for bench tops and carcasses of kitchen cabinets. It may be used in door construction, although medium-density fibreboard (MDF) is more generally used. Particleboard is made from small chips or particles of softwood, which are combined with a synthetic resin and bonded by applying pressure and heat. Particleboard is lighter than MDF, yet is strong and stable. It is manufactured with three layers: the two outer layers are made up of fine particles while the inner core of the board is formed from larger chips of wood. This produces a fine outer surface for sanding and gluing, with a strong, stable inner core for screwing and fixing. High-moisture-resistant (HMR) particleboard is formed in the same manner, but the bonding agent is a special moisture-resistant resin. It is not waterproof but will repel moisture, making it an excellent choice in the construction of kitchen cabinetry.
Particleboard and HMR particleboard are usually supplied with a melamine coating to both sides. Without this coating the board may be used as a substrate for high pressure laminate. It is unusual to use this product in its raw state as the surface is not completely smooth and is does not take a paint finish well.
Medium-Density Fibreboard and Moisture-Resistant Medium-Density Fibreboard (MDF)
Medium-density Fibreboard (MDF) is a wood-based product. It is produced by combining fine timber fibres with resin. Heat and pressure are then applied to produce a smooth board. It is a very dense product with excellent strength and ability to hold fixings. Moisture-resistant MDF (MRMDF) is a moisture-resistant MDF that may or may not have a green hue to the board. MDF is used as a substrate in the manufacture of cupboard doors and may have a melamine, timber veneer, vinyl or painted finish. It is also used when a routed pattern is required on a cupboard door or a curved edge is desired that can then be painted to match the required colour.