Verresr et Céramiques - Notes de cours

Les Verres 5 - La fabrication
5.6. Produits dérivés
In Building Products, the following types of processing are performed by glass
manufacturers and also by other companies.
5.6.1. Multiple Glazed Units
Multiple glazed units incorporate two (or more) panes, separated by spacers to
create a hermetically sealed gap between each successive pane in the unit, e.g.
Pilkington Insulight. This gap can be filled with air which is subsequently desiccant
dried, or low conductivity gases such as argon can be used instead of air in the
cavities. Low emissivity coating can be added to one or more interior glass surfaces
in a multiple glazed unit to provide improved thermal insulation. is used in buildings
and vehicles to control heat and light transmission.
5.7. Glass Wool Production
In manufacture a carefully controlled mix of raw materials, mainly comprising either
diabase rock or silica, is heated to high temperature until molten. In the case of
glass wool this is accomplished in a furnace, whilst for rock wool production a
cupola is used.
The resulting molten glass or rock product is then spun and formed into a flexible
mat for further processing into finished products. Inorganic rock or slag are the main
components (typically 98%) of stone wool.
The remaining 2% organic content is generally a thermosetting resin binder (an
adhesive) and a little oil. Glass wool products usually contain 95% to 96% inorganic
material.
H. Schyns 5.7