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OptiFiltrate (Perlite)

Perlite is a volcanic rock formed when lava (molten rock) spews out of a volcano and cools in a rapid manner. Because of rapid cooling, water is trapped within the rock, and the lava forms into a glass-like structure.

The distinguishing feature which sets perlite apart from other volcanic glasses is that when heated to a suitable point, it expands from four to twenty times its original volume.

This expansion is due to the presence of two to six percent combined water in the crude perlite rock. When quickly heated to above 900°C the crude rock pops in a manner similar to popcorn as the combined water vaporises and creates countless tiny bubbles which account for the amazing light weight and other exceptional physical properties of expanded perlite.

This expansion process also creates one of perlite's most distinguishing characteristics: its white colour. While the crude rock may range from transparent light grey to glossy black, the colour of expanded perlite ranges from snowy white to greyish white.

Perlite that has been expanded is extremely light and able to absorb many times its weight in water.

Typical uses of OptiFiltrate:
  • Filtration of wine, fruit juices, oils and metal solutions
  • Carrier of agrochemicals, pesticides and herbicides
  • Medium to high-temperature insulation/fireproofing
  • Construction industry
  • Acoustic insulation in plasters, mortars and boards
  • Horticulture
OptiFiltrate Benefits:
  • The low density of OptiFiltrate makes it typically 20% to 50 % lighter than other filter media, ensuring cost effective filtration.
  • It is lightweight, inert, sterile and has a neutral PH.  It does not dissolve or affect the taste of the product being filtered, making it ideal for food applications.
  • It can be used in all standard filtering devices such as pressure leaf filters, plate and frame filter presses or vacuum drum filters.
  • It has a very low thermal conductivity, low sound transmission, high fire resistance, a large surface area and low moisture retention.
Optimin has the ability to custom manufacture products to customers' specific requirements based on their specific needs.
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