Влияние современных технологий на требования стандарта к качеству древесно-стружечных плит

Abstract

The concept of quality in the minds of Soviet and Russian people is inextricably linked with the concept of GOST. Requirements, imposed by the standard to quality of production, does not remain constant, but change in accordance with the level of development of science, technology and best practices. The article considers dynamics of changes of requirements of GOST 10632 "Chipboards. Technical conditions" to the quality of chipboards in the last 40 years. The author analyzes the wording of this standard, approved in 1977, 1989, 2007 and 2014. For specified period of time the labeling of the plates P-A and P-B to P1, P2 has changed, which is related to the harmonization with foreign standards. In the last edition of the GOST 2014 plates have no restrictions on size, so as to replace presses periodic action, which have specific dimensions of the heating plates of the press, presses of continuous extrusion come. The same situation is with the densities of boards, the manufacturer sets its value, but the strength of the plates shall conform to the requirements of the standard. Although, strength characteristics (ultimate strength in tension perpendicular to the plate and the ultimate strength in static bending) are reduced with each new edition of GOST. Tightening of the requirements has occurred to the sanitary and hygienic indicators of chipboards. The content of free formaldehyde has decreased from 10 to 4 mg per 100 g of absolutely dry plate. To obtain competitive boards of E0 emission class Russian chemical industry needs to develop a large amount of resins with low content of free formaldehyde.