FIELD: process engineering.
SUBSTANCE: proposed fiber board is pollution-free material due to use of hardening agent instead of phenol resin. In producing said fiber board by wet process, acrylate and epoxy resins are used instead of phenol resin that do not contain bisphenol - A. Both hardening agents are thermosetting resins, in fact, not reacting at 100°C or lower, but readily reacts to cause hardening at temperature over 140°C.
EFFECT: optimum hardening agents and optimised use of circulation water.
5 cl, 2 dwg, 7 tbl
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