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Melt Fracture Solutions | Chuo Yii Die Head Troubleshooting

Solve melt fracture and sharkskin defects in blown film extrusion. Expert troubleshooting guide from Chuo Yii covering die gap, temperature, and formulation solutions.

Melt Fracture Troubleshooting Guide for Blown Film Extrusion

Comprehensive solutions to eliminate sharkskin and surface melt fracture defects at the die head stage

Melt fracture

Melt fracture, also known as sharkskin or surface melt fracture, often occurs at the die head and material stage. Here are common checks and solutions:

Die Gap Too Narrow?
Replace with larger gap die inserts to improve flow.

Melt Temperature Too Low?
Increase the temperature of the extruder and die head for better melt flow.

Formulation Issue?
Use a polymer with a wider molecular weight range (e.g., LDPE) instead of one with a narrower range (e.g., LLDPE).

Insufficient Additives?
Increase additives to meet processing requirements and improve film quality.

Output Rate Too High?
Reduce the output rate to prevent excessive strain on the material.

Die Head Material Issue?
Choose the appropriate material for the die head to minimize molten slippage.

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What are the most effective ways to eliminate sharkskin and melt fracture defects in our blown film production line?

Chuo Yii's comprehensive troubleshooting approach addresses all six critical factors causing melt fracture: die gap adjustment, melt temperature optimization, polymer formulation selection, additive enhancement, output rate management, and die head material selection. Our 25+ years of expertise in die head design ensures you receive proven solutions that improve surface quality and production efficiency. Manufacturers worldwide have successfully eliminated melt fracture defects using our precision-engineered die heads and expert technical guidance—let us help optimize your extrusion process today.

By implementing these proven melt fracture prevention strategies, plastic film manufacturers can achieve superior surface quality, consistent gauge control, and enhanced production efficiency across single-layer and multi-layer blown film applications. Chuo Yii's precision-engineered die heads and air rings, manufactured using advanced Taiwan technology and CNC machining capabilities, are specifically designed to support up to 7-layer blown film extrusion with minimal gauge variation. Our global OEM manufacturing services and customizable components enable packaging film, lamination film, and barrier film producers across 45+ countries to resolve melt fracture defects while optimizing their extrusion processes. Contact our technical team today to receive a customized melt fracture elimination strategy for your specific production requirements and polymer materials.