Heat seal aluminum foil, commonly known as heat-sealable foil, is specially designed to form a seal when heated. This sealing capability is critical in various packaging applications, where maintaining freshness, ensuring protection from external factors, and providing tamper-evident features are crucial.
Heat seal aluminum foil is a key process in modern packaging, offering durable and sealed seals to preserve the integrity of products across different industries.
Heat seal aluminum foil exhibits excellent performance across a wide temperature range, with features such as peelability, puncture resistance, and solvent resistance, and adheres well to various substrates. Haomei offers a range of processing options and can customize aluminum foil according to customer needs, including custom sheets, non-standard roll widths, or die-cut shapes.
What is Heat Sealing?
Heat sealing involves applying heat and pressure to the edges of aluminum foil to melt and fuse the material, thereby forming a strong barrier against moisture, oxygen, and contaminants. This process is typically combined with specialized coatings or resins to enhance adhesion and sealing strength. For example, polymers such as polypropylene (PP) or polyethylene (PE) are used as heat-activated layers to improve bonding with the substrate.
Specifications of Heat Seal Aluminum Foil
| Parameter | Description |
| Common Alloys | 8011, 1235, 8079 |
| Thickness | 10 to 50 microns (µm), depending on the application and required durability |
| Heat Seal Coating | With heat-activated adhesives or polymer coatings to promote bonding during the sealing process |
| Seal Temperature | 180°C to 250°C, with temperature ranges varying based on the coating formulation and required sealing strength |
| Seal Strength | 2 to 5 pounds per inch (10 to 25 N/15mm), ensuring the integrity of the product during handling and transportation |
Heat Seal Aluminum Foil Material Selection
- Alloys: Common alloys include 8011, 1235, and 8079, each tailored for specific uses:
- 8011: Used in food packaging (yogurt lids, snack bags) due to its high strength and good flexibility.
- 1235/8079: Used in pharmaceuticals and cosmetics, offering excellent barrier properties.
- Coatings: Heat seal coatings (such as carboxyl-modified vinyl chloride resins) enhance adhesion to plastics like PP, PET, or PVC. Patented formulations emphasize compatibility with methyl methacrylate copolymers to improve bonding.
- Thickness: Ranges from 10 to 50 microns, balancing flexibility and durability according to application requirements.
Heat Seal Aluminum Foil Advantages
| Advantages | Description |
| Extended Shelf Life | Heat Seal Aluminum Foil effectively seals out air, moisture, and oxidizing agents, thus prolonging the shelf life of products. This makes it an ideal choice for perishable foods and pharmaceuticals, effectively inhibiting microbial growth and maintaining product freshness and potency, ensuring consumers receive the best possible experience. |
| Tamper-Evident | Heat Seal Aluminum Foil features a significant sealing performance that clearly ruptures the seal once opened. This makes it especially suitable for applications in industries such as pharmaceuticals, where safety is a high priority, preventing tampering and ensuring product integrity and consumer safety. |
| Versatility | Heat Seal Aluminum Foil is highly adaptable and can be widely used in various packaging forms, including bags, trays, and blister packs. It is not only used extensively in the food industry but also in cosmetics, electronics, and many other sectors, providing a diverse range of packaging solutions. |
| Sustainability | Heat Seal Aluminum Foil is made of aluminum, which is 100% recyclable. With the growing trend towards eco-friendly packaging, this material has become an ideal choice. Its sustainability not only meets environmental protection needs but also helps reduce resource waste and improves the environmental footprint of the entire supply chain. |
| Heat Resistance | Heat Seal Aluminum Foil has excellent heat resistance, capable of withstanding high-temperature environments and suitable for sterilization processes at temperatures like 121°C. It is widely used in autoclave sterilization and bagged cooking applications, ensuring stable performance even under extreme conditions, protecting the contents of the package from damage. |
Chemical Compositon of Hot Sealing Aluminum Foil
| Grade | Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Al |
| 1235 | Si+Fe: 0.65 | 0.05 | 0.05 | 0.05 | - | 0.1 | 0.06 | 99.35 | |
| 8011 | 0.5-0.9 | 0.6-1.0 | 0.1 | 0.2 | 0.05 | 0.05 | - | 0.1 | remains |
Hot sealing aluminum foil mechanical properties
| Mechanical Properties | ||||
| Alloy | Temper | Tensile strength Rm/MPa | Elongation A50mm(%)≥ | Elongation A100mm(%)≥ |
| 8011 8079 | O | 50-120 | 13-15 | 0.5-4 |
| H22 | 90-150 | 5-6 | 1.0-2.0 | |
| H24 | 120-170 | 2-5 | - | |
| H26 | 140-190 | 1-2 | - | |
| 1235 | H14 H24 | 110-160 | 4-6 | 2-3 |
| H16 H26 | 125-180 | 2 | 1 | |
Popular Sizes of Haomei Heat Seal Aluminum Foil
- Silver heat seal foil - 115 mm rolls
- Transparent Seal Perforation - 115 mm Roll
- Heat Seal Foil - 78 mm rolls
- Red heat seal foil - 115 mm rolls
- Pierce Seal Foil - 115 mm Roll
- Peel Seal Aluminium Foil - 78 mm Roll
- 38 µm Pierceable and Peelable Aluminium (Blue) Heat Seal Foil
- Pierce Seal Foil - 78 mm Roll
- 70 µm Peelable AVE Aluminium (Red) Heat Seal Foil
- Transparent Seal Peel - 78mm Sterile Roll
- 25 µm Easy Pierce (Green) Heat Seal Foil
- Transparent Seal Peel - 78 mm Roll
- 85 µm Aluminium (Black) Heat Seal Foil
- Heat Seal Foil - 115 mm Roll
- Gold heat seal foil - 115 mm rolls
- Silver heat seal foil - 78 mm rolls
- Transparent Seal Perforation - 78 mm Roll
- Peel Seal Aluminium Foil - 115 mm Roll
- Transparent Seal Peel - 115 mm Roll
- Green heat seal foil - 78 mm rolls
- Red heat seal foil - 78 mm rolls
- Transparent Seal Perforation - 115 mm Roll
- Transparent Seal Perforation - 78 mm Roll
- 20 µm Easy Pierce (Green) Heat Seal Foil
- Green heat seal foil - 115 mm rolls
- Gold heat seal foil - 78 mm rolls
Applications of Hot Sealing Aluminum Foil
| Application Area | Description |
| Food Packaging | Heat Seal Aluminum Foil is widely used in food packaging, especially for sealing yogurt cups, milk cartons, cheese packaging, and snack bags. Its excellent sealing performance effectively isolates air and moisture, maintaining product freshness and extending shelf life, preventing oxidation and microbial contamination, thus ensuring consumers enjoy fresh and safe food. |
| Pharmaceutical Packaging | Heat Seal Aluminum Foil plays a crucial role in pharmaceutical packaging. It ensures the integrity of the medication during transportation and storage through blister packs and unit-dose packaging. The material provides strict sterile protection, preventing external contaminants and moisture from entering, thus ensuring the potency and safety of the drugs. |
| Cosmetic Packaging | Heat Seal Aluminum Foil is widely used in cosmetic packaging, particularly for sealing containers of creams, serums, and other cosmetic products. Its effective sealing performance prevents pollutants in the air from entering, maintaining the purity and effectiveness of the cosmetics, while also extending their shelf life, ensuring safety and performance when used by consumers. |
| Industrial Applications | Heat Seal Aluminum Foil is also used in various industrial packaging applications, particularly for packaging chemicals, powders, and other sensitive materials that require secure and stable sealing. Due to its chemical resistance and stability, Heat Seal Aluminum Foil effectively prevents external factors from affecting sensitive substances, ensuring the safety and integrity of products during transportation and storage. |
Heat seal aluminum foil is a key material in modern packaging, providing protection, versatility, and branding opportunities across various industries.
8011 Hot Sealing Aluminum Foil for Yogurt Cup Lids
For yogurt cup lids, the hot sealing aluminum foil used needs to have good flexibility and plasticity to ensure a reliable seal on the cup's opening. Typically, the 8011 aluminum foil used has a thickness ranging from 0.01 to 0.05 millimeters, with a smooth surface free from scratches, wrinkles, or other defects. This type of foil requires excellent sealing properties, good antibacterial performance, and outstanding puncture resistance to prevent leaks or contamination during use.
1235 Hot Sealing Aluminum Foil for Pharmaceutical Packaging
For pharmaceutical packaging, the 1235 hot sealing aluminum foil must meet pharmaceutical-grade sterility requirements and have a clean and flat surface. Generally, high-purity aluminum materials from the 1000 series, such as the 1235 alloy, are used, with foil thicknesses ranging from 0.015 to 0.2 millimeters. This foil offers good puncture and peel performance, ensuring easy handling and providing effective sealing.
Medical Grade Heat Seal Foil Tape
Medical-grade heat seal aluminum foil tape is an efficient, cost-effective, and reliable sealing solution, widely used to seal microporous plates, holes, and channels in diagnostic equipment. This tape can be used over a wide temperature range, exhibiting peelable, puncture-resistant, and solvent-resistant properties, and can adhere firmly to various substrates to ensure sealing performance.
8011 Hot Sealing Aluminum Foil Bags for Food Packaging
8011 aluminum foil used for food packaging in hot sealing aluminum foil bags is typically laminated with plastic films (such as PE, PET, etc.), with foil thicknesses generally ranging from 0.04 to 0.09 millimeters. These foil bags have excellent air and liquid barrier properties, effectively blocking oxygen and moisture, making them suitable for refrigeration and freezing environments from -30°C to 100°C. The heat-sealed edges of the bags are secure and aesthetically pleasing, free from burrs, ensuring complete isolation from the external environment and preserving the freshness and quality of the food.
Related Questions about Hot Sealing Aluminum Foil
What temperature do you seal aluminum foil?
Sealing Temperature: The temperature for sealing aluminum foil depends on the specific application and type of sealing material. Generally, for packaging applications, the temperature range for hot sealing aluminum foil is between 150°C and 220°C (302°F to 428°F). The exact temperature may vary based on the foil's thickness and the type of adhesive or laminate used. Adjusting the temperature is crucial to ensure a strong and reliable seal without damaging the foil or packaging material.
Can aluminum be heat sealed?
Heat Sealing Aluminum: Yes, aluminum can be heat sealed, but it requires a heat-sealable coating or laminate. Pure aluminum foil itself cannot be directly heat sealed; instead, it is typically coated with a heat-sealable material that allows it to adhere during the sealing process. This is commonly used in food and pharmaceutical packaging.
Can aluminum foil work as a heat shield?
Heat Insulation: Aluminum foil is indeed an effective heat insulation material. It reflects radiant heat rather than conducting it, making it very useful in applications where heat reflection is needed. In various industries, aluminum foil is used for insulation and protecting surfaces from high temperatures, such as in thermal blankets, cooking equipment, and barriers in certain electronic devices.
Can heat pass through aluminum foil?
Heat Transfer: Aluminum foil does conduct heat to some extent, but in many applications, its primary function is to reflect heat rather than conduct it. While heat can pass through aluminum foil, its high thermal conductivity means it can quickly transfer heat. However, due to its reflective properties, it is more effective at redirecting radiant heat than allowing significant heat transfer.