E-glass

Milled E-glass (glass (amorphous silica) consisting of SiO₂, Al₂O₃, CaO, MgO, B₂O₃, F₂, Na₂O, K₂O, Fe₂O₃) is produced from an industrial E-glass side stream. Milled E-glass can be characterised by:

• ‘Green’ attributes, as a product of an industrial side stream.
• Relatively high Mohs hardness of 6.

Advantage over quartz and cristobalite and certain feldspar grades: free of labelling, milled E-glass grades can be used as an alternative when labelled grades of other mineral fillers are no longer permitted or wanted.

Basic properties

Product overview

Production location Portafill G

Portafill G is the brand name for Sibelco’s milled E-glass product.

Benefits

• Burnish resistance: due to its hardness of 6 on Mohs scale, milled E-glass provides good burnish resistance (low tendency to become glossy when rubbed).
• Ease of tinting: due to the combination of refractive index, brightness and colour, paints including fine milled E-glass particles provide excellent reproducible colour results when working with tinting systems.
• Gloss control: the gloss level of an interior coating can be regulated by selecting the appropriate grade of milled E-glass.
• Scrub resistance: due to its hardness of 6 on Mohs scale, milled E-glass improves the wet-scrub resistance of interior decorative paints.
• Stain resistance: milled E-glass acts as a supporting mineral filler in stain resistant coatings.
• Abrasion resistance: due to its hardness of 6 on Mohs scale, milled E-glass will increase the coating’s resistance to wear.
• Clarity: due to its fairly low refractive index, milled E-glass becomes transparent when combined with certain binder systems.