Alu Alu Cold Forming Foil
Aluminum cold forming foil, also known as cold forming blister foil, is a specialized material mainly used in the pharmaceutical packaging industry, especially for blister packaging. This foil is made by laminating two layers of aluminum foil, and its structure effectively seals the medication in protective packaging.
Aluminum foil cold forming (Cold Forming Foil) refers to the process of stamping multi-layer composite aluminum foil into blister packaging at room temperature, without the need for heating to form.
- Core Material: Uses 8021-O or 8079-O alloy aluminum foil as the base material, with a thickness of 0.025~0.08mm, offering excellent ductility and fracture resistance.
- Typical Structure: OPA (25-30μm)/AL (45-60μm)/PVC (60μm), total thickness 140-160μm
Aluminum foil cold forming is an advanced technology used for drug packaging, achieving high barrier protection through multi-layer composite materials and cold stamping processes.
Alu Alu cold forming aluminum foil is a multi-layer composite material specifically designed for pharmaceutical blister packaging, especially suitable for drugs sensitive to moisture or light. It combines aluminum foil with polymer films to create a strong barrier layer that ensures product integrity and extends shelf life.
Alu alu cold forming foil Composition
- Outer Layer: The outer layer is typically made of high-quality aluminum foil, with excellent barrier properties. It is often treated to enhance its strength, durability, and corrosion resistance.
- Inner Layer: The inner layer is also aluminum foil, but thinner than the outer layer. The inner layer is usually coated with a special paint or polymer to provide adhesion, which is crucial for effectively forming the blister pockets.
| Layer | Material | Thickness | Function |
| Outer Layer | OPA Film | 25 µm | Provides mechanical strength and printability. |
| Adhesive Layer | Adhesive | 4-8 g/m² | Bonds the layers securely. |
| Aluminum Foil Layer | 8021 or 8011 Aluminum Alloy | 45-60 µm | Primarily provides a barrier against moisture, oxygen, light, and gases, enhancing flexibility and crack resistance. |
| Inner Layer | PVC Film | 60 µm | Forms the inner sealing layer of the blister cavity. |
| Total Thickness | - | 130-160 µm | Depending on the aluminum layer thickness (45–60 µm aluminum foil). |
Alu alu cold forming foil Properties
- Barrier Protection: The primary function of aluminum foil is to provide a high level of protection against environmental factors such as moisture, oxygen, and ultraviolet light, thereby helping to extend the shelf life of the contents (typically tablets or capsules).
- Cold Formability: This aluminum foil is specifically designed for cold forming, meaning it can be molded into cavity shapes without heating. This allows it to be used for creating complex blister packaging shapes while protecting the internal products without compromising the integrity of the aluminum foil.
- Tamper-Evident Seal: Cold forming aluminum foil can create a tamper-evident seal. When the blister pack is opened, clear signs of tampering will appear, ensuring the safety of the medication.
- Customization: The thickness, size, and barrier properties of the foil can be easily customized to meet specific product requirements.
- Non-toxic, Medical Safety: Since it is used for pharmaceutical packaging, the aluminum cold forming foil is non-toxic and complies with stringent food and drug safety standards.
- Mechanical Strength: It can withstand deep drawing without cracking. Thermal stability ensures consistent performance during the sealing process.
Alu Alu Cold Forming Foil Applications
- Pharmaceutical Packaging: Alu-alu cold forming foil is most commonly used for packaging tablets and capsules, especially for products requiring high protection against moisture, light, and oxygen. It is widely used for packaging sensitive drugs such as antibiotics, vitamins, and other health supplements.
- Cosmetics and Health Supplements Packaging: In addition to pharmaceuticals, it is also used for packaging cosmetics and health supplements, where protection against environmental factors is critical.
- Food Industry (Special Applications): In certain niche food products where shelf life and contamination prevention are important, cold forming foil may also be used, though it is more commonly applied in the pharmaceutical industry.
ALU ALU foil (aluminum-aluminum foil) is a packaging material made by cold-forming two layers of aluminum foil, widely used in applications that require high barrier performance and protection. Its unique structure and properties make it especially suitable for products with strict environmental requirements, such as pharmaceuticals, nutritional supplements, and cosmetics.
| Application | Description |
| Solid Medications (e.g., tablets, capsules) | ALU ALU Cold Forming Foil is widely used in the packaging of solid medications, especially tablets and capsules. Its dual-layer aluminum foil structure provides excellent barrier properties, effectively preventing the intrusion of moisture, oxygen, UV light, and other environmental factors, thus maintaining the stability of the medication and extending its shelf life. By providing high-level protection, ALU ALU Cold Forming Foil ensures that the medication remains unaffected during transportation and storage. |
| Sensitive Medications (e.g., vitamins, hormones, antibiotics, vaccines) | ALU ALU Cold Forming Foil has significant advantages in packaging sensitive medications such as vitamins, hormone drugs, antibiotics, and vaccines. Its outstanding barrier properties prevent the intrusion of oxygen and moisture, avoiding degradation of the medication's components, ensuring the stability of active ingredients, and extending the shelf life. For temperature- and humidity-sensitive medications, ALU ALU Cold Forming Foil provides additional protection, reducing the risks posed by environmental changes. |
| High-Value Medications (e.g., low-dose, high-value drugs) | Due to the high barrier properties offered by ALU ALU Cold Forming Foil, it is highly effective in packaging high-value, low-dose medications. These drugs are often expensive and particularly sensitive to environmental changes. ALU ALU Cold Forming Foil ensures that the medication retains its efficacy during storage and transportation, preventing oxidation, hydrolysis, or other degradation of the components, thus maximizing the quality of the medication. |
| Nutritional Supplements (e.g., vitamins, mineral supplements) | ALU ALU Cold Forming Foil is also widely used in packaging nutritional supplements, especially those containing active ingredients such as vitamins and mineral supplements. Since these products are prone to moisture, oxidation, or degradation, ALU ALU Cold Forming Foil effectively blocks external oxygen and moisture with its dual-layer aluminum foil structure, ensuring the stability and efficacy of the supplements, extending shelf life, and ensuring consumers receive high-quality and safe nutritional supplements. |
| Cosmetics (e.g., sensitive cosmetics, skincare products) | ALU ALU Cold Forming Foil is commonly used in the packaging of sensitive cosmetics and skincare products, especially those containing easily degradable ingredients such as anti-aging components, vitamin C, and retinol. These ingredients are susceptible to light, air, and humidity, and ALU ALU Cold Forming Foil offers excellent gas and light barrier properties, preventing the degradation of active ingredients, ensuring skincare efficacy, and extending the product's shelf life. |
| Medical Devices (e.g., disposable devices, sterile equipment) | ALU ALU Cold Forming Foil also plays a critical role in the packaging of medical devices. For medical instruments that require a sterile environment (e.g., surgical instruments, disposable syringes), ALU ALU Cold Forming Foil provides a high level of protection, effectively isolating air, moisture, bacteria, and other external contaminants, ensuring the sterility and shelf life of the products. By preventing the influence of external factors, ALU ALU Cold Forming Foil ensures that medical devices can be used safely and efficiently. |
Alu alu cold forming foil Advantages
- Excellent Protective Performance: The double-layer aluminum foil enhances protection against moisture, oxygen, and light, ensuring product integrity and shelf life.
- Higher Strength and Durability: The cold forming process imparts strength and resistance to physical damage.
- Cost-effective for Sensitive Products: Provides an economical and efficient packaging solution for sensitive products like pharmaceuticals, preventing degradation or contamination.
- Heat-free Sealing: Unlike other packaging that requires heat sealing, the cold forming process is more energy efficient.
- Barrier Properties: Nearly complete barrier against water vapor, oxygen, ultraviolet light, with excellent aroma retention.
- Safety: The stamping process involves no heat contact, preventing thermal degradation of the medication.
- Versatility: Suitable for both low-speed and high-speed packaging machines, and allows for diverse blister shapes through mold design.
Alu alu cold forming foil Manufacturing Process
Raw Material Requirements
The aluminum foil must be flat, free of pinholes and scratches, with burr-free edges and must meet A-grade brushing standards.
The base material is laminated with biaxially oriented polyamide (BOPA) and polyvinyl chloride (PVC) to form a multi-layer structure.
Lamination Process
BOPA (outer layer), aluminum foil (middle layer), and PVC (inner layer) are bonded with adhesive. Pressure, lamination temperature, and drying time are controlled to ensure bonding strength.
Some products adopt a double aluminum foil design to enhance puncture resistance.
Comparison Between Alu alu Cold Forming Foil and Traditional PVC
| Comparison Item | Cold Forming Aluminum Foil | Traditional PVC Rigid Film |
| Barrier Properties | Total barrier (moisture, oxygen, light) | Limited barrier, easily permeable to moisture/oxygen |
| Forming Method | Cold stamping, no thermal stress | Vacuum forming, requires heating |
| Application Scope | Extreme environments (high/low temperatures, high humidity) | Regular environments |
Alu-alu cold forming foil is an essential material for protecting sensitive products, especially in the pharmaceutical and nutritional supplement industries. Its excellent barrier performance and ability to form tamper-evident seals make it the preferred choice for high-quality packaging. However, its cost and specific equipment requirements should be considered when selecting a packaging solution.
