Expanded or not Unexpanded Packing Ton Bag Application 1. Heat/sound/low-temperature/oxygen preservation or insulation material in various fields 2. Foundry material as covering agent to clear up slag for metal casting 3. Perlite filter aid used in foundry, food, drink, medicine, chemical,etc. 4. Agricultural / horticultural / hydroponics /soilless culture perlite as seedings growing media
