Wood adhesive

China has become the world's largest producer of wood-based panels, wood adhesives are used to more than four million years of t, its main gum kinds of classes for the formaldehyde resin adhesive. This paper reviews the types of wood glued with formaldehyde synthetic resin adhesives research and development, production and application and development, focusing on an overview of the release of low-formaldehyde urea-formaldehyde resin, melamine - a total of condensation of urea resin and phenolic resin adhesives research and development applications, and its development trend was predicted.
Key words: low-formaldehyde; wood adhesive; progress

Wood-based panel is an important wood products, plywood, mainly by the wood and non-wood are glued unit formed by the use of adhesive bonding an artificial plates, species include plywood, fibreboard, particleboard, Blockboard and so on, mainly used for furniture manufacturing and interior decoration at the same time as a travel manufacturing, construction template, container floor, glued timber structure class timber.

At present, China Wood-based panel production capacity has more than 60 million m3, in Table 1. If the consumption of plastic fibreboard production capacity in order to 180kg/m3 meter (solid content 50%), particleboard to 120kg/m3 dollars (solid content 65%), plywood to 87.36kg/m3 dollars (solid content 50%), joinery board to 26kg/m3 dollars (solid content 50%), other wood-based panels in order to 120kg/m3 dollars (wood furniture,cherry wood,buy wood,veneer wood,wood veneer,wood free,sun wood,solid content 65%) in 2005, production of wood-based panels used in adhesives, preliminary estimate of consumption of liquid adhesive 7.164 million, t converted into solid Adhesives 3.732 million t. In addition, the surface decoration of wood-based panels with plastic impregnated paper and veneer veneer and so on with glue,

Since the majority of particleboard and fiberboard are subject to veneer before using; plywood (including the integration of sheet) also into the boards by adhesive bonding. From this estimate wood processing industry, adhesive consumption of more than 4 million t.

The vast majority of China's wood-based panel products used in furniture manufacturing and interior decoration, so all kinds of indoor wood-based panels are mainly used in the manufacture of urea-formaldehyde resin adhesives (UF) adhesive. In recent years, due to moisture-proof and waterproof sheet increased demand, melamine - a total of condensation of urea resin (MUF), phenol-formaldehyde resin (PF) and water-based polymer-isocyanate resin (API or EPI) adhesive for use in rising. Wood-based panel surface processing, the main use of melamine resin impregnated paper (MF) adhesives, also use a certain amount of urea-formaldehyde resin adhesive, while the veneer veneer Multi-urea-formaldehyde resin - polyvinyl acetate adhesive compound.
Low formaldehyde emission wood adhesive research

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From the available synthetic adhesive technology and applied technology perspective, China's adhesive fully meets the needs of environmentally friendly wood-based panel products, but the application of environmentally friendly wood adhesive is also not wide enough. In this paper, the release of low-formaldehyde wood adhesives research and development and application point of view, processing of synthetic resins for wood adhesives are reviewed.