Solvent-Free & Glue-Free: Why 7-Layer Co-Extruded Blown Film is the Gold Standard for Food Safety
1. Zero Solvents, 100% Food Safety
Unlike multi-layer laminated films that bond materials using glues, 7-layer co-extrusion melts and extrudes multiple functional resins (such as PA, EVOH, and PE) simultaneously in a single step. This process completely eliminates chemical adhesives, ensuring:
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Zero Benzene and Solvent Residue: Eliminates chemical migration into food products.
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Full Regulatory Compliance: Fully certified under FDA, BPA-Free, RoHS, and SGS food-contact standards.
2. Superior Barrier Performance & Puncture Resistance
By combining various functional resins into a specialized 7-layer structure (e.g., PA/EVOH/PE), the film offers:
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Maximum Shelf-Life Extension: EVOH provides an exceptional oxygen and moisture barrier, preserving freshness for meat, seafood, and dairy.
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No Delamination & High Puncture Resistance: Seamless layer integration prevents film separation, significantly reducing puncture rates during transportation and deep-drawing thermoforming.
3. How Huizhou Henepack Ensures Uncompromised Quality
At Huizhou Henepack New Materials Co., Ltd., we turn advanced technology into guaranteed reliability for our global partners:
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Advanced Production Capacity: Operating 8 multi-layer co-extrusion blown film lines, along with high-speed slitting and bag-making machinery, we ensure custom colors, sizes, and rapid lead times.
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In-House Quality Control: Every batch undergoes rigorous testing using our in-house gas chromatographs (for solvent residue verification), tensile testers, pendulum impact testers, and back-pressure retorts (simulating 121°C+ high-temperature sterilization).
Industry FAQ
Q1: What is the main difference between 7-layer co-extruded film and laminated packaging?
A: Co-extruded film is formed in one step without adhesives, making it completely solvent-free, eco-friendly, and immune to delamination. Laminated film uses glues to bond layers, which can pose solvent residue risks and layer separation.
Q2: Can 7-layer co-extruded film withstand high-temperature sterilization and vacuum sealing?
A: Yes. Henepack’s 7-layer PA/EVOH/PE co-extruded films are engineered for high thermal stability, making them ideal for high-temperature retorting, vacuum pouches, and deep-drawing thermoforming applications.
Huizhou HenePack New Materials Co., Ltd.
