chemical resistance

WAYS TO INCREASE CHEMICAL RESISTANCE OF DISCOLOR GLASS BOTTLES

The possibility of using gas-thermal treatment of glass containers with a solution of ammonium salts to increase the water-resistance had shown. To avoid possible cracking of the glass surface, it had suggested using an alcohol suspension or multiple sulfur-containing organic solvents. This greatly improves the chemical resistance of the jar. Therefore on the surface of the treated bottle formed a touch of salt, which has easily washed off with water.

THE INFLUENCE OF THE POLY(VINYL CHLORIDE) ON THE CHEMICAL STABILITY OF POLYESTER COMPOSITES

The influence of the polymeric modifier – poly(vinyl chloride) on the chemical stability of polyester composites was investigated. From the results of the research, it is found that equilibrium water absorption for polyester composites is established within 7-14 days. Water absorption of unmodified polyester material is about 1,5%.

Powder Electrostatic Technology of Household Appliance Enamelling

Basics and distinctive features of contemporary resource and energy saving technology of powder electrostatic application (POESTA) of vitreous enamel coatings are described. Its technological, economic and ecological advantages over slip enamelling in household appliances manufacture, particularly in Ukraine, are discussed. Synthesis principles of special glass frits with high specific electric resistivity for POESTA and results of investigation concerning development and industrial implementation of ground, direct-on and coloured cover enamels for household appliances are given.