Why Choose a Three-Layer Co-Extrusion Film Blowing Machine?
I. When is a Three-Layer Machine Essential?
1. For Superior Strength and Tensile Force
Single-layer films are prone to tearing. Three-layer co-extrusion significantly enhances the film's structural integrity and tensile strength.
2. For Manufacturing Courier Bags, Trash Bags, and Food Packaging
These applications demand high toughness, excellent puncture resistance, and leak-proof performance-all of which require a robust three-layer structure.
3. For Enhanced Barrier Properties (Anti-Leakage & Anti-Oxidation)
The three-layer design allows for a specialized middle layer (e.g., EVOH or PA) to provide superior barriers against oxygen and moisture, ensuring better freshness, aroma retention, and防潮 (moisture protection).
4. For Biodegradable Films and High-Speed Production
Biodegradable materials (such as PLA/PBAT) often have poor fluidity. Three-layer co-extrusion offers greater processing stability, preventing film breakage and ensuring consistent output.
5. For High Transparency and Excellent Flatness
The three-layer structure ensures more uniform thickness distribution, resulting in a brighter surface and a more premium appearance.
6. For Cost Reduction on Raw Materials
This technology enables a "sandwich" structure: you can use high-quality virgin material for the outer layers to ensure quality, while using recycled material (regrind) for the core layer to significantly reduce costs.
Products That Must Use Three-layer Co-extrusion Film Blowing Machine
• Express bag film
• Shopping bag / tote bag film
• Food packaging film
• Agricultural mulch film and greenhouse film
• Composite packaging base film
• Biodegradable plastic bag film
• High-toughness industrial packaging film
Why Three-layer Co-extrusion Film Blowing Machine
• To produce high strength film with better toughness and puncture resistance.
• For making express bags, shopping bags, food packaging film, agricultural film.
• Better barrier property, transparency and thickness uniformity.
• Suitable for biodegradable film (PLA/PBAT) production.
• Save material cost by using different materials in three layers.
• Higher output and more stable running.
