Glass quality and adhesion evaluation in glass fiber production

Abstract

The processes occurring during the production of glass fiber from glass with different chemical composition and the influence of hydrostatic forces, surface tension, and internal friction on the formation process are examined. The critical fiber formation temperature under conditions where the viscosity and surface tension of the molten glass are of different magnitude is determined. A new approach to evaluating the capability of glass to form glass fiber according to the ratio of the surface tension to the viscosity is proposed. A computational method of evaluating the formation rate of glass fiber with different diameters is given for the example of E glass. Some mechanisms of adhesion of organic polymers and protein molecules to a glass surface are presented.The rapid advancement of modern technology is making it necessary to create new, artificial materials with technical, technological, and performance properties which are superior to those of natural materials. Since the chemical and mineral composition, structure, and fabrication conditions can all be varied, the physical -mechanical, chemical -biological, optical, electrical, and other properties of the new technical materials can be varied over quite wide ranges. Glass fiber and different types of composite materials based on glass fiber have a special place among these materials.Glass-fiber materials are characterized by substantial thermal and chemical stability, high mechanical strength with relatively low density, good electric, heat, and sound insulation properties as well as inflammability. The glass compositions of glass used for the production of glass fiber (GF) and the assortment of articles using glass fiber is continually expanding; GF-based articles are finding applications in electrical engineering, aviation, aerospace, defense, medical, and other areas of technology.Together with the glasses which are conventionally used to manufacture GF, new types of glass are actively being developed and adopted: high-modulus glass with low and zero alkali concentration, whose rheological properties and quality differ considerably from those of glass with known compositions.The formation and, specifically, fiber formation capability of glass is determined by the ratio of two temperature-dependent process parameters -internal friction (viscosity), which is expressed by the dynamical coefficient of viscosity h, and the surface tension s. The ratio of the internal friction P h and surface tension P s forces determines the flowability of molten glass in the high-flow state within the formation temperature intervals.Conventionally, the capability of glass to form fiber is characterized by the ratio of the viscosity to the surface tension of the melt [1 -3]. This ratio is the fiber-formation indicator. Since the surface tension of quartz and silicate melts,

Characterization of glass fiber felt and its performance as an air filtration media

“…Glass fiber felt is a porous material with high porosity and excellent thermal, mechanical and chemical stability properties [20]. Besides the acoustic and thermal insulation applications [21], glass fiber felt has drew resurrective attentions as air filtration material due to its low cost and high dust holding capacity.…”