Products structure
Our high-barrier film features a multi-layer coextrusion structure designed to maximize product shelf life:
Outer Layer (Printing/Forming): PVC (Polyvinyl Chloride) – Provides rigid structural support, ensuring excellent thermoformability for deep-drawn cavities without cracking.
Middle Layer (Barrier): PVDC Coating – A dense copolymer layer applied via a mature emulsion coating process. It acts as the primary barrier against oxygen, moisture vapor, and odor transmission.
Inner Layer (Heat-Seal): PE (Polyethylene) – A soft heat-seal layer (often LDPE or CPP) applied via extrusion coating or adhesive lamination. It ensures a reliable, low-temperature seal with lidding materials (like aluminum foil) to create an airtight package.
Key Features & Benefits
Superior Barrier Protection: The PVDC layer significantly reduces Oxygen Transmission Rate (OTR) and Water Vapor Transmission Rate (WVTR), safeguarding moisture-sensitive pharmaceuticals and oxygen-sensitive foods.
Exceptional Seal Integrity: The integrated PE layer guarantees a strong, consistent heat seal, preventing leaks and maintaining sterility.
Outstanding Formability: The rigid PVC base allows for high-speed thermoforming on standard blister packaging machines, accommodating various tablet and capsule sizes.
Versatile Compatibility: Suitable for lidding with standard push-through foil or peelable laminates.
Primary Applications
Pharmaceutical Blister Packs: Ideal for packaging hygroscopic tablets, capsules, and powders.
Medical Device Packaging: Used for pouches requiring high sterilization and seal strength.
High-Barrier Food Packaging: Suitable for aroma-sensitive products, snacks, and liquid food pouches.
Manufacturing Process (How It's Made)
To ensure consistency and performance, our film undergoes a controlled manufacturing process:
Base Sheet Preparation: Rigid PVC film is prepared as the forming web.
PVDC Barrier Coating: A specialized PVDC copolymer emulsion is precision-coated onto the PVC. It is then cured in a high-temperature oven, forming a dense, crystal-like barrier layer-a proven industry standard for blister packaging.
Heat-Seal Lamination: A molten LDPE layer is extruded directly onto the PVDC surface (Extrusion Coating) OR a pre-made PE film is laminated using food-grade polyurethane adhesives (Dry Lamination). This layer provides the critical heat-seal functionality required for pouch making and blister backing.