Ryolex-Milled is our brand of expanded perlite we refer to as macro shards. Using milled perlite has unique advantages as an ultra-fine filler. The process starts by expanding siliceous volcanic rock and then milling it down under strict quality control conditions to create a surface area that acts as jagged interlocking structures. The main difference milled perlite has from non-milled is that its increased surface area acts as a “carrier” for other types of chemically designed additives and coating.
We make Ryolex in both milled and non-milled forms.
The many applications for milled Ryolex include:
This 3-dimensional structure helps reduce shrinkage upon drying or curing, maintaining the physical dimensions of the host material. This also allows for companies to apply their own chemical binding solutions to attract and remove what they wish. The standard size for milled perlite shards is below 300 microns (50 mesh). The density usually ranges from 5 to 15 pounds per cubic foot (80-240 kg/m3).
All analyses are shown in elemental form even though the actual forms present are mixed glassy silicates. Free Silica may be present in small amounts, characteristic of the particular ore body.
*By Food Chemicals Codex Method