Vitreous Protective and Decorative Coverings on Wood Particle Board

Abstract

scientific and technological bases of receiving vitreous coverings on wood with use of a torch of low-temperature plasma are developed. Before plasma dusting of glass powders by grain structure 60-120mkm, the special protective coating protecting chipboard from destruction at high-temperature influence of a plasma stream on a front surface of the wood particle board (WPB) was applied. The structure of an intermediate protective coating including mix of a fine-grained glass powder and liquid glass is developed. Preliminary drawing an intermediate protective layer provides several consecutive technological operations.
 For receiving vitreous coverings fight of colored and colourless glass are used which was previously ground in spherical porcelain mills. Optimum process parameters of plasma dusting of glass powder on the front surface of chipboard are developed. Optimum parameters of plasma melting is: current - 800A; operating voltage – 30B, a consumption of plasma-forming gas of argon 2m3/h.
 Operational and aesthetic-consumer properties of vitreous protective and decorative coverings are investigated. It is established that vitreous protective and decorative coverings have the high durability of coupling with an intermediate protective layer. The received vitreous protective and decorative coverings on the basis of colored and colourless glass have the high water resistance, acid resistance, alkali resistance, as well as microhardness and high aesthetic performance.
 The technology is recommended for widespread industrial introduction.

Development of an effective technology for producing composite wood-plastic board materials for construction and furniture purposes

“…Today, all over the world, special attention is paid to the development of an effective technology for producing composite wood-plastic materials that provide high physical and mechanical properties [1][2][3][4][5][6][7]. In this aspect, the development of composite wood-plastic materials and boards based on fillers -stems of annual plants that replace wood, and chemically modified polymer binders -is an urgent task.…”

Los áridos ligeros para los hormigones a base de residuos vegetales

“…Is of some interest the use of polystyrene in the production of polymeric woody materi-als (PWM) from shredded wood -sawdust opened the possibility of obtaining a new type of PWM with new properties, allowed to find a new non-traditional for wood materials binder, and for thermoplastics -non-traditional processing methods and new uses of the resulting ma-terials. The polymeric woody material was impregnated with styrene monomer sawdust with subsequent thermochemical or radiation polymerization in the presence of sawdust and com-bining the finished polystyrene polymer with the sawdust use of its solution, melt or mechani-cal mixing of crushed polymer with sawdust (12,13,14,15) . In order to increase the strength of the building material a method is proposed for the preparation of vegetable raw materials, in this case sawdust, for the production of xylolite.…”

“…This is due to the fact that cement paste, being an alkaline medium (pH=11-12), affects hemicellu-lose, which is hydrolysed alkali and converted into simple sugars, soluble in water and nega-tively influencing the firmness of sawdust products. Studies (12,17,18) have shown that the hydration process, which occurs during the preparation of woody cement, produces a hydrate of calcium oxide. The hydrate of calcium oxide with water-soluble sugars present forms calcium sugars and, in particular, the most persistent three-calcium sugars (C12H22O11*3AO*3H2O) are produced with sucrose.…”

Chemical Resistance of Cement Stone in Organic Acids

“…There are a lot of studies on the resistance of building composites in aggressive media [1][2][3][4][5][6][7][8][9][10][11][12][13]. This problem is relevant for the agricultural sector, since an integral part of its technological process is associated with the formation organic waste form a favorable environment for microorganisms [14][15][16].…”