Polyurethane (PU) foams are two-component spray systems that expand within seconds after mixing components A and B, creating a durable insulating coating. In underground mining, they serve a dual function: sealing and insulation.
Where can two-component foam be applied from a portable kit?
- Sealing air barriers in mining plants
- Restricting airflow by closing leaks around electrical and installation routes and in other places requiring airflow restriction
- Filling empty spaces (gaps, recesses)
- Making plugs in boreholes
- Preventing water outflow
- Insulation of cooling containers
- Thermal and acoustic insulation
Properties of PU foams used underground:
The FROTH-PAK system is designed for use in underground methane and non-methane mining plants. Key features: • Closed-cell structure — water and gas barrier • Rapid expansion — drying time 30 seconds • Can be cut in 5 minutes • No external power supply required • Excellent adhesion to: coal, shale, concrete, wood, metal
Advantages over traditional sealing methods:
Compared to traditional methods, PU foams have key advantages underground: excellent adhesion to uneven rock surfaces, effective even with very intense airflow, cured foam does not shrink or collapse, thermally stable and moisture resistant after curing.