Лако-красочные материалы — производство

In the production of particleboards and MDF only liquid resins are used. In OSB produc­tion in Europe liquid resins are more often used, while rather in North America powder resins are used. The advantages and disadvantages of liquid and powder resins are sum­marized in Table 16.

A. Combination of Various Adhesives

For the purpose of obtaining special gluing effects and results, combinations of adhesives or resins might be used, for example:

addition of PVAc to UF resins in order to obtain better wetting of the wood surface [24] and a more elastic glue line [338]

UF/MUF + PMDI (as accelerator, crosslinker and/or fortifier) [8,9,192,193] combination of adhesives in particleboard or OSB production: e. g., core layer of PMDI and face layer of MU(P)F resin or PF resin production of an MUF resin by mixing a UF and an MF resin or a UF resin with an MF powder resin.