Analysis of the effectiveness of emission control and reduce the length of the bonding of wood materials with various modifiers
The results of investigations have shown that all modifiers can reduce the duration of the curing process of the phenol-formaldehyde and urea-formaldehyde adhesives. Aluminosilicates and schungite sorbents considerably reduce the emission of free formaldehyde of adhesives in plywood and particleboard. Best results are obtained when we used as a modifier, schungite sorbents with a particle size of 0.2 mm. The content of free formaldehyde in phenol-formaldehyde resins decreases from 0.18 to 0.04 %, in urea-formaldehyde glue decreases from 0.18 to 0.03 %. Time of curing process Reduce to 6-8 min.