Stretch Film Extrusion Machine

Stretch film extrusion machine Performance ＆ Advantages

The Stretch film extrusion machine is mainly used for PE lithium electric film; PP,PE breathable film; PP, PE, PET, PS thermo-shrinkage packing industrial.

A modern stretch film extrusion machine is not simply a production machine; it’s also a strategic device that has the capacity to determine the quality of the product, the efficiency of the production, and the competitiveness of the market.

With multiple-layer technology, intelligent control systems, and energy-efficient design, today’s extrusion lines offer manufacturers the performance and dependability necessary in global packaging markets.

Equipment composition of the stretch film extrusion machine

A stretch film extrusion line is composed by extruder, a die head, a sheet cast, longitudinal stretching, transverse stretching, an automatic winder, and a controlling system.

1. Extruder: The extruder is the central component that melts, plasticizes, and conveys raw materials.

Main functions:

• Melting LLDPE or mLLDPE resin
• Homogeneous mixing of additives (tackifiers, slip agents, recycled materials)
• Providing stable melt pressure to the die head

2. Die head: The die’s head forms a flat sheet of polymer that is melted by the heat of the molten polymer.

Main functions:

• Distributing the melt evenly across the width
• Controlling film thickness
• Supporting multi-layer co-extrusion structures (3-layer, 5-layer, etc.)

3. Sheet casting: The section that casts the movie quickly freezes the molten substance to maintain its consistency.

Main functions:

• Cooling and solidifying the film
• Controlling surface finish and transparency
• Ensuring flatness and uniform thickness

4. Longitudinal stretch: The unit that stretches longitudinally moves the film through the machine direction.

Main functions:

• Increasing tensile strength
• Enhancing elongation properties
• Improving load-holding performance

5. Transverse stretching: In some advanced strains, transverse tension increases the thickness of films in the cross direction.

Main functions:

• Improving mechanical balance
• Enhancing tear resistance
• Increasing puncture strength

6. Automatic winder: The automatic winder will wind the completed movie into uniform, compact rolls.

Main functions:

• Controlled winding tension
• Automatic roll change
• Edge trimming (if required)

7. Controlling system: The system controls the entire extrusion process to produce stable and efficient products.

Main functions:

• Temperature regulation for all zones of heating.
• The speed of synchronization between units.
• Thickness measurement (if connected to an online gauge)
• Alarm and diagnostic devices

Stretch film extrusion machine features

Relying on our advanced designing and processing ability, our equipment’s features are:

1. Special designed logitudinal stretch roller
2. Driving and controlling systems are from world famous brand
3. The controlling system is from a precision PLC program
4. High stretch accuracy, high speed, and steady working status

We are able to design equipment as per the customer’s request with high accuracy, stretch equipment: 1-10 stretching ratio, width range will be 500-3000mm, thickness range will be 0.05-0.3mm.