Al Foil 6.35my , 7my and 9my for Laminaton Food Grade

Wrapping foil for chocolates, candies, biscuits and cookies: Provides moisture and vapor protection during normal shelf life periods.

Lamination within composite packaging structures: Often laminated to paper, plastic or carton substrates for enhanced barrier and shelf appeal.

Overwrapping of cheese slices, meats and dry/deli foods: Provides basic protection during typical refrigerated storage times.

While 6.35my Alu foil works well for many applications, its thinner gauge is also a disadvantage as it has lower strength and barrier compared to thicker foils. It may not be suitable for very high-barrier packaging needs or situations with higher creep loading over long shelf lives.

Al Foil For Lamination Grade 7my

Moving up the thickness scale, 7my or 7 micron Al Foil For Lamination offers improved barrier and durability benefits compared to 6.35my. Here are some key attributes of 7my Al Foil For Lamination:

Thickness - At 7 microns Al Foil For Lamination, it delivers a noticeable step up in physical strength and impermeability qualities.

Barrier properties - Excellent protection against moisture, gases, light, bacteria and aromas/flavors. On par with best commercial packaging needs.

Strength - Higher tear and puncture resistance for packaging, conversion and end-use. Better creep performance in retorting and MAP applications.

Composition - Purer aluminum allows for optimized barrier with negligible pore effect even at ultra-thin 6.35 micron aluminum foil thickness.

Appearance - Maintains same shiny surfaces as lower grades but with a premium barrier quality feel.

Weight - A small increase over 6.35 micron aluminum foil but works for a broader range of demanding applications.

Pricing - Commands a slight premium compared to 6.35my.

common uses include:

Lidding and tray overwraps in retort processed foods: Withstands high heat/pressure of retorting.

Cook-in packaging and pouches: Suitable for longer shelf life freezer/refrigerated or ambient stable MAP applications.

Composite lidding films: Provides a robust barrier core for laminated packaging of snacks, bakery,deli and prepared meals.

Pharmaceutical and medical packaging: Meets demanding integrity needs of these applications.

While 7 micron aluminum foil has enhanced barrier over 7 micron aluminum foil, it is still lightweight enough for high-speed production lines. The improved properties make it ideal for applications with extended shelf lives or distribution under varied temperature conditions.

Aluminum Foil Grade 9 micron aluminum foil

At the highest end of aluminum foil food grades is 9my or 9 micron aluminum foil. This extra thick foil confers the ultimate in barrier protection for shelf-stable and long life applications. Key attributes include:

Thickness - At 9 microns, it provides unsurpassed barrier strength for demanding packaging uses.

Barrier properties - The best in class impermeability to gases, moisture, flavors and microorganisms - on par with rigid containers.

Strength - Enhanced puncture resistance and ability to withstand abuse/creep loading far beyond other foils.

Composition - Must be of highest purity aluminum to realize full barrier without comprising on thickness.

Appearance - Maintains shiny surface but with a more pronounced heft and protective quality.

Weight - Heavier gauge makes it unsuitable for high-speed lines or unique packaging shapes.

Pricing - Most expensive option but amortized by enabling long shelf life applications.

Common end uses include:

Shelf-stable retorted foods in flexible pouches: 2+ year ambient storage like MREs, backpacking meals, etc.

Extended life oxygen sensitive products:MAP packaged cheese, fresh cuts, etc.

Industrial and institutional packaging:C-store roller grills, vending, foodservice disposables, etc.

Select pharmaceutical packaging: Moisture sensitive tablets and medications.

While extremely effective at shelf life extension, 9my foil comes at a cost and thickness tradeoff. It is best applied strategically for shelf-stable applications that demand versatile distribution and prolonged shelf lives.

Lamination Considerations for Different AluFoil Grades

An important factor when selecting a suitable foil grade is how well it will laminate or bond to other packaging substrates like plastic films, paperboards or aluminum foils during the converting process. Each thickness has pros and cons:

6.35my foil laminates well at higher speeds due its more flexible thinner gauge. However, bonding strength may be compromised vs. thicker foils.

7my foil provides robust lamination with optimal adhesive levels. Balances line speeds with strength. Most widely used grade.

9my foil lamination requires more adhesive due to its rigidity at lower speeds. Higher bonding risks like delamination or wrinkling.

Other considerations include heat sealability properties depending on the particular application. In general, the thicker the foil the higher sealing temperatures required for a consistent seal.

When designing a composite laminated package structure, tests should be conducted to optimize foil selection, adhesive type/levels and processing parameters. This ensures the final packaging achieves both production efficiency and target barrier/shelf life requirements.

Regulatory Compliance of Food Grade Aluminum Foil

For any food contact material, regulatory safety and compliance is critically important. All aluminum foil grades used in food applications must therefore strictly adhere to relevant standards and regulations set by authoritative bodies.

Key compliance aspects for food grade aluminum foil include:

FDA Compliance: Must meet requirements of 21 CFR 177.1680 for safe food contact use as established by the FDA.

EU Compliance: Conform to Regulation (EU) No 10/2011 on plastic materials and articles intended to come into contact with food.

Heavy Metal Impurities: Comply with limits for substances like lead and cadmium as specified by major standards.

Purity Level: Meet minimum purity levels stipulated by USP, cGMP and BFRL to safeguard against chemical hazards.

Lubricants & Antistatic Agents: Only FDA approved lubricants and antistatic coating agents allowed for food safety.

Traceability: Full material traceability from manufacturing to ensure consistent regulatory compliance.

Certifications: Common certifications like BRC, FSSC 22000 demonstrate quality control and safety management.

Reputable aluminum foil producers have in place stringent quality programs along with certifications to guarantee production of food compliant foils meeting all current statutory requirements for food contact applications. This provides regulatory reassurance for packaged food manufacturers.

HTMM is Flexible Packaging aluminum foil manufacturer in China. if you have any inquiry about Alu foil jumbo roll . Please contact us.

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