7 Micron Aluminium Foil for Flexible Packaging

7 micron aluminium foil—a type of “double-zero” ultra-thin foil—is a preferred choice in the flexible packaging industry for balancing barrier performance with material costs. It is widely used in composite packaging for food, personal care products, and tobacco, particularly for items requiring medium-to-long shelf lives. Haomei Aluminum operates a sophisticated production line dedicated to double-zero foil. Haomei 7 micron aluminum foil excels in pinhole control, thickness uniformity, and batch-to-batch consistency, meeting advanced industry standards and ensuring a stable supply for flexible packaging manufacturers worldwide.

Key Specifications

Aluminium foil for flexible packaging product range covers multiple alloy systems, allowing for flexible selection based on the required barrier level and processing techniques for the packaged contents:

– Alloy Temper: We stock 8021-O and 1235-O alloys; 8079-O is available for high-end barrier requirements. All products are supplied in a fully annealed (soft) temper.

-Thickness Precision: Nominal thickness is 7μm, with a tolerance controlled within ±3%. Thickness deviation between the beginning and end of a full coil is ≤2%.

– Width and Coil Weight: Widths range from 100mm to 1650mm, compatible with various high-speed laminating and slitting machines. Maximum coil weight is 2.5 metric tons, with standard core diameters of 76mm/152mm, helping to minimize downtime during coil changes.

– Pinhole Specifications: Standard grade has a pinhole count of ≤50/m²; high-precision grade is ≤15/m²; and premium custom grades can be controlled to ≤12/m². There are no through-pinholes with a diameter greater than 0.1mm—significantly exceeding the requirements of the national standard for general-grade material.

– Compliance and Certification: Food-grade aluminium foil meet FDA 21 CFR and EU 1935/2004 standards. Heavy metal migration levels are well below the limits established for food-contact materials.

Key Performance Advantages for Flexible Packaging

1. Superior Barrier Properties for Long-Cycle Distribution

With a water vapor transmission rate (WVTR) of ≤0.25 g/(m²·24h) and an oxygen transmission rate (OTR) of ≤0.4 cm³/(m²·24h·0.1MPa), this 7 micron aluminium foil offers approximately 20% greater barrier stability than 6 micron aluminium foil. It maintains consistent protection against light, oxygen, and moisture—even in demanding environments such as cross-ocean shipping or storage in hot, humid regions—ensuring a shelf life of 12-18 months. For instance, a client exporting pet food to South America—a journey involving a 45-day ocean transit—previously experienced occasional complaints regarding moisture-related spoilage when using thinner aluminum foil. After switching to our high-precision 7-micron aluminium foil product, the number of packaging-related quality complaints dropped to zero.

2. High Processing Tolerance, Compatible with Various Production Lines

At 7 microns, aluminium foil falls within the mature, stable range for mass-produced “double-zero” (ultra-thin) aluminum foil. It is relatively forgiving regarding the tension-control precision of lamination equipment, making it highly compatible with both high-speed imported production lines and standard domestic machinery. It is less prone to issues such as web breaks, tracking errors, or wrinkling. The surface is treated with a low-residual-oil process (≤3 mg/m²), which eliminates the risk of pinholes or delamination after adhesive lamination. With a lamination peel strength of ≥2.0 N/15mm, the time required for new clients to calibrate their equipment can be reduced by approximately 30%.

3. Excellent Cost-Performance Ratio, Balancing Quality and Economy

With a basis weight of approximately 18.9 g/m², 7 micron aluminum foil reduces material consumption by 22% compared to standard 9-micron aluminium foil, effectively lowering raw material procurement costs while still meeting most packaging requirements. Furthermore, the option for large-diameter roll supply reduces the frequency of roll changes and minimizes waste from splicing. This offers a clear advantage in total cost of ownership, making it an ideal choice for the large-scale production of fast-moving consumer goods (FMCG) packaging.

Mainstream Application Scenarios

7 micron flexible packaging aluminum foil is widely used for the packaging of snack foods (including those for export), pet food and treats, full-sized personal care and household products, as well as pharmaceutical granules and intermediates. It is also frequently utilized for twist-wrapping candies, as a component in multi-layer laminates for wet wipes, and as lidding foil for cups. For clients requiring cross-border transport, high packaging stability, and effective control over total costs, the 7-micron aluminium foil offers the best overall value.

Haomei 7-micron aluminum foil production line has an annual capacity of 12,000 metric tons, with a consistent mass-production yield exceeding 98.5%. We maintain regular stock of standard specifications, ensuring delivery within 15 days. Products intended for export are packaged using a five-layer vacuum, moisture-proof system to completely prevent oxidation and moisture damage during transit. Furthermore, we provide comprehensive technical support, including guidance on coating compatibility and the optimization of process parameters. Please contact our sales and technical team to request detailed technical specifications or free samples.