Solving Gel and "Fish Eye" Issues in Stretch Film Extrusion Machine Production

In high-performance stretch film production, surface defects like gels and fish eyes are primary challenges. These imperfections—caused by polymer degradation, unmelted resin, or contamination—compromise tensile strength and optical clarity. Our advanced stretch film extrusion machines utilize precision engineering to eliminate these defects across 5-layer, 3-layer, and 2-layer configurations.

Precision Thermal Profiling and Co-Extrusion

Multi-layer co-extrusion allows for independent thermal management of each layer. By mapping specific melt temperature profiles, operators can keep the core layer stable while ensuring the skin layers reach full fusion. This precision prevents hotspots that lead to polymer chain scission and subsequent gel formation.

• 5-Layer Stretch Film Extrusion Machine: Optimized for barrier properties and high-speed stability.
• 3-Layer & 2-Layer Stretch Film Extrusion Machine: Feature specialized screw designs that balance shear heat and mixing.

Advanced Filtration and Contamination Control

To prevent "fish eyes" caused by foreign particles or ungelled resin, our machines are equipped with high-capacity screen pack changers.

• Micro-Filtration: Supports mesh sizes down to 100 microns to capture contaminants before the die.
• Homogenization: Specialized barrier screws optimize the processing of low-melt-flow-index (MFI) resins, reducing gel counts by over 85% compared to conventional designs.

Material Efficiency and Quality Output

Our extrusion technology enhances the dispersion of additives like slip and antiblock agents, preventing the agglomeration that typically triggers surface defects.

• Recycled Material Integration: The 5-layer design allows for higher percentages of post-industrial recycled (PIR) content in the inner layers while maintaining a defect-free virgin surface.
• High Yield Rates: Optimized flow dynamics ensure consistent production with yield rates typically exceeding 98%.

Key Technical Features:

• Independent Layer Control: Prevents thermal degradation in sensitive resins.
• High-Shear Screw Geometry: Ensures complete resin fusion and material homogeneity.
• Automated Screen Changers: Minimizes downtime during filter transitions.
• Remote Diagnostics: Integrated systems for real-time monitoring of melt pressure and temperature.
• By integrating robust filtration with precision melt chemistry, our stretch film extrusion lines provide a reliable solution for producing defect-free, high-clarity films for global industrial applications.