The produced thermoplastic liner is installed into existing underground pipelines, then heated and expanded using steam, hot water, or air pressure. The folded liner returns to its original round shape and forms a close-fit structural pipe inside the host pipe.

Main Functions of FIPP Thermoplastic Liner Production Line

1. Thermoplastic Material Plasticizing and Extrusion

The extruder is the core equipment of the production line.

Its main functions include:

• Heating thermoplastic materials

• Melting and homogenizing polymers

• Providing stable extrusion pressure

• Producing continuous liner tubes with uniform quality

The extruder ensures that the thermoplastic material reaches a stable molten state before entering the forming die.

2. Continuous Liner Tube Forming

Through a specially designed extrusion die, the molten thermoplastic material is formed into a continuous tubular liner.

The production line controls:

• Outer diameter

• Wall thickness

• Roundness

• Surface quality

• Mechanical strength

The liner dimensions are precisely designed according to the rehabilitation pipe diameter and structural requirements.

3. Folding Profile Forming

After extrusion and cooling, the thermoplastic liner passes through a folding system.

The forming unit creates a special folded shape that allows:

• Easy transportation

• Reduced installation space

• Smooth insertion into existing pipelines

• Efficient rehabilitation of long-distance pipelines

During installation, the folded liner is heated and expanded to recover its original circular shape.

4. Quality Control and Production Stability

The PLC control system automatically manages:

• Extrusion temperature

• Screw speed

• Melt pressure

• Cooling temperature

• Haul-off speed

• Liner dimensions

This ensures continuous production and consistent liner performance.

Working Principle of FIPP Thermoplastic Liner Production Line

The production process is based on thermoplastic extrusion technology:

Raw Material Feeding → Extrusion Plasticizing → Die Forming → Vacuum Calibration → Cooling → Folding → Haul-Off → Cutting or Winding

Applications of FIPP Thermoplastic Liner Production Line

1. Trenchless Pipeline Rehabilitation

The main application is manufacturing liners for Fold and Form Pipe Rehabilitation.

Used for:

• Municipal sewer rehabilitation

• Stormwater pipeline repair

• Underground drainage renewal

• Industrial wastewater pipeline rehabilitation

Typical application range:

DN150 to DN600

2. Gravity Sewer Rehabilitation

FIPP liners are widely used for:

• Aging sewer renewal

• Cracked pipe repair

• Corroded pipeline rehabilitation

• Leakage prevention

3. Industrial Pipeline Rehabilitation

Applications include:

• Chemical wastewater pipelines

• Factory drainage systems

• Process water pipelines

• Underground utility pipelines