ECOLOGY AND PRODUCTION OF LOW-TOXIC CHIPBOARDS FROM LARCH BASED ON LIGNOSULFONATES

Tishchenko Viktor Pavlovich, Mishchenko Olga Alekseevna

Particle boards are in high demand today, this is due to their low cost and wide range, but their significant drawback is a negative environmental factor - toxicity. In this paper, the authors analyzed the qualitative and physico-chemical characteristics of the resins used in the production of particle boards. The analysis was based on low-molten urea-formaldehyde resins of various brands of domestic production. The analysis showed that with the improvement of existing grades of resins, a number of side problems arise, such as limited viability and short shelf life, fast resin synthesis, high air pollution with methanol during production, fire hazard, etc. As an alternative, it is proposed to use secondary wood processing products of the pulp and paper industry - lignosulfonates. The results of the work confirm the possibility of effective use of lignosulfonates (waste of the cellulose industry) and modifier A (waste of hydrolysis production) as binder components, in particular, for the manufacture of particle boards.

Keywords:chipboard, larch, lignosolfonate, low-molecular-weight urea-formaldehyde resins, modified binder, formaldehyde, toxicity