Plastic underdrains are composed of a plastic core wrapped with filter fabric. The plastic core is primarily made of thermoplastic synthetic resin, modified and extruded into fine plastic filaments in a molten state through a nozzle. These filaments are then fused at nodes by a molding device to form a three-dimensional mesh structure. The plastic cores currently come in various structures such as rectangular, hollow matrix, and circular hollow circular shapes. This material overcomes the shortcomings of traditional underdrains, featuring high surface porosity, good water collection, large void ratio, excellent drainage, high compressive strength, good pressure resistance, flexibility, adaptability to soil deformation, durability, light weight, ease of construction, and significantly reduced labor intensity for workers. This results in high construction efficiency, making it widely welcomed by engineering departments and extensively applied.

Plastic drain channels application range:

1) Reinforcement and drainage for road and railway subgrades and shoulders.

2) Tunnel, subway underground passages, and underground warehouse drainage.

3) Soil and water conservation for slope and embankment development.

4) Vertical and horizontal drainage for various retaining walls.

5) Draining for slippery surfaces

6) Coal-fired power plant ash pile drainage; landfill engineering drainage;

7) Sports Facilities: Golf Courses, Baseball Fields, Football Fields, Parks, etc. - Drainage for Resting Green Areas

8) Roof garden and planter box drainage

9) Construction foundation drainage work

10) Agricultural and horticultural underground irrigation and drainage systems

11) Drainage systems for low-lying and damp areas. Drainage works for land preparation.