How to Ensure the Quality of Aluminum Sealing Film

I. Raw Material Control (Source‑level Quality Assurance)
Aluminum Foil Substrate: Adopt food‑grade soft aluminum foil 8011/1235 (thickness: 0.03–0.06 mm) with qualified purity, free from pinholes, oxidation spots and other surface defects.
Heat‑sealing Layer: Match heat‑sealing adhesives according to container materials (modified PE/EVA/PP for PE/PP/PET/glass containers) to ensure strong adhesion, medium resistance and no chemical reaction with contents.
Lamination & Printing Layer: Use solvent‑free food‑grade polyurethane adhesive and eco‑friendly ink with high adhesion, no migration and no discoloration.

II. Production Process Control (Stable Sealing Performance)
Lamination Process: Strictly control adhesive coating weight, drying temperature and lamination pressure to avoid delamination and blistering.
Heat‑sealing Layer Coating: Ensure uniform coating without missing areas for consistent sealing performance.
Slitting: Flat burr‑free cuts and precise dimensional accuracy.
Curing: Complete curing to improve peel strength and weather resistance.

III. Quality Inspection (Mandatory Pre‑delivery Tests)
Physical Properties: Test peel strength, heat‑sealing strength, pinholes (zero leakage points), thickness uniformity (tolerance ≤ ±5%), tensile resistance and folding endurance.
Sealing & Medium Resistance: No leakage under negative pressure or water immersion tests; resistant to acids, alkalis, oils and other contents, stable under sterilization, refrigeration and freezing conditions without bulging or delamination.
Appearance & Hygiene: Clean surface free from defects; food‑grade products tested for solvent residues, heavy metals and microorganisms to meet national standards.

IV. Storage & Transportation
Store in a dry, cool, shaded and well‑ventilated environment (temperature: 15–30 °C, humidity: 40%–70%) with protection against moisture, sunlight, heavy pressure and corrosion. Avoid extrusion during transportation with intact protective packaging.

V. End‑use Compatibility
Wide Compatibility & High Customization
Compatible with all spirits including whiskey, brandy, vodka, gin and rum. Customizable finishes include bright silver, matte gold, bronze, black‑gold and other colors. It supports minimalist luxury, vintage luxury and modern trendy styles to perfectly match overall bottle design.

One‑stop Service by Glorious Glassware
We provide integrated services covering aluminum sealing film design, mold‑making, printing and heat‑shrink processing. Customized production can be synchronized with glass bottles, caps and stoppers in strict compliance with Canadian food‑grade safety standards, delivering complete high‑end spirits packaging sealing solutions for you.