Cold Forming pharmaceutical foil

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What is Cold Forming pharmaceutical foil

Cold Forming pharmaceutical foil (Alu alu foil) is a kind of aluminum foil material specially used in the field of pharmaceutical packaging. It is made by Cold Forming process and has high formability, excellent sealing and good barrier properties to meet the strict requirements of pharmaceutical packaging.

Cold forming pharmaceutical foil

Cold forming pharmaceutical foil

Introduction to Cold Forming pharmaceutical foil

Cold Forming pharmaceutical foil structure: biaxially oriented nylon film BOPA, outer printing layer, aluminum foil substrate (AL) (Huawei product), polyvinyl chloride PVC, inner printing layer, adhesive (VC), etc.

Cold Forming aluminum overcomes the shortcomings of conventional pharmaceutical PVC hard sheets and PP hard sheets in terms of moisture resistance, air barrier, light protection, thermal stability, etc. It is a high-end pharmaceutical packaging blister material that isolates various gases and blocks light radiation. It can effectively extend the shelf life of drugs and can be used as a pharmaceutical packaging material in extreme (high/low temperature) environments.

Executable standards: national standard, American standard, European standard, Russian standard, Japanese standard, etc.

The aluminum foil substrate alloys commonly used for Cold Forming pharmaceutical foil are 8021 aluminum foil and 8079 aluminum foil.

Technical Data of Cold Forming Foil

Test Parameters Units Specification Value Tolerance Limit Final Value
Total Grammage GSM 248 +/- 8% 228-267
Total Thickness Micron 145 +/- 8% 133 – 157
Opa Film Micron 25 (29 GSM) +/- 8% 26-31
Adhesive GSM 5 +/- 1 GSM 4 ¨C 6
Aluminium Foil Micron 45 ( 127 GSM) +/- 8% 116 – 137
Adhesive GSM 5 +/- 1 GSM 4 ¨C 6
PVC Film Micron 60 (84 GSM) +/- 8% 77 – 91
Width MM +/-1 MM Within Specs Limit ¡¡
Bond Strength GSM / 15MM 450 Min Value On plus side
Seal Strength GSM / 15MM 500 Min Value On plus side
WVTR G/ M2 / 24HRS 38¡ãC 98% RH 1 Max Value NIL
Structure of cold forming pharmaceutical foil

Structure of cold forming pharmaceutical foil

Chemical composition of Cold Forming pharmaceutical foil substrate

8021 aluminum foil chemical composition (mass fraction) /%
Alloy Si Cr Cu Mn Fe Zn Mg V Ti Other Al
Single Total
8021 ≤0.15 ≤0.05 1.2~1.7 0.05 0.15 Remain
8079 aluminum foil chemical composition (mass fraction) /%
Alloy Si Fe Cu Zn Other Al
Single Total
8079 0.05~0.30 0.7~1.3 ≤0.05 ≤0.10 0.05 0.15 Remain

Specifications of Cold Forming pharmaceutical foil

Material structure: OPA/AL/PVC

Processing thickness: 0.016-0.2mm

Processing width: 10-1600mm

Material density: 1.67g/m3

Brewing depth: X<13mm

Product color: mainly silver, can be printed according to customer needs

Delivery time: 7-35 days

Application areas: blister materials for high-end pharmaceutical packaging, high-sealing pharmaceutical packaging, high/low temperature pharmaceutical packaging materials, etc.

Features of Cold Forming pharmaceutical foil

Precise forming: The Cold Forming process can ensure that the medicine foil forms a precise blister structure, which is suitable for wrapping various types of medicines, including tablets, capsules, granules, etc.

High sealing: The formed blister structure has strong sealing with the bottom film, which can effectively prevent the penetration of oxygen, moisture and light, protect the medicine from the external environment, and extend the shelf life.

Mechanical strength: Cold Forming pharmaceutical foil usually has good mechanical strength, can withstand certain physical shocks and pressures, and ensure the integrity of the medicine during transportation and storage.

Safety: Special packaging designed for child safety, such as blisters with child-proof opening function, can prevent accidental ingestion.

Wide adaptability: Suitable for medicine packaging under different temperature conditions, including tropical and low-temperature storage medicines.

Production efficiency: Cold Forming is an efficient production process, suitable for large-scale production and reducing costs.

Environmentally friendly and recyclable: Aluminum foil materials can be recycled and reused, which is in line with environmental protection trends.

Common application areas

  • High-end pharmaceutical packaging: For drugs that require high protection standards, such as biological agents, vaccines, etc.
  • Drugs with high sealing requirements: Ensure the stability of sensitive drug ingredients.
  • Drugs stored in special environments: For example, drugs used in tropical areas require packaging materials that are resistant to high temperatures and high humidity.
  • Suppositories and powder composite film packaging: Adapt to the packaging needs of drugs in different forms and provide a suitable protective environment.
  • Cold Forming pharmaceutical foil is one of the key technical materials in the pharmaceutical packaging industry. It ensures the quality and safety of drugs through precise production processes, and meets the pharmaceutical market’s demand for efficient and safe packaging solutions.

Advantages of cold aluminum compared with traditional PVC:

  • 1. Cold Forming aluminum can be used to package pills, tablets, powders, suppositories, capsules and external compresses instead of PVC.
  • 2. Cold Forming pharmaceutical foil is moisture-proof, oxygen-proof and light-proof, and has excellent barrier properties. It is particularly suitable for packaging drugs that are sensitive to moisture or need to be sold in hot and humid areas.
  • 3. By changing the mold, it is very convenient to design and manufacture beautiful and diverse shapes. In addition, its gorgeous appearance adds to the attractiveness of the packaged products, which can greatly promote the sales of products and has become synonymous with high-end drugs.
  • 4. Cold pressing is used to eliminate the heating process, and it is heat-sealed with PTP aluminum foil, which is easy to open.

Manufacturing Process of Cold Forming pharmaceutical foil

The production of Cold Forming pharmaceutical foil involves several key steps, starting from the selection of raw materials to the final manufacturing of the foil. Below is an overview of the typical manufacturing process:

Selection of Raw Materials:

The process begins with the selection of high-quality raw materials, including aluminum foil, polyamide (PA), and polyvinyl chloride (PVC). These materials are chosen based on their specific properties to meet the desired characteristics of the cold-forming aluminum foil.

Preparation of Aluminum Foil:

The aluminum foil is typically sourced in large rolls. The rolls are unwound, and the foil is inspected for any defects or impurities. It may undergo a cleaning process to remove contaminants that could affect the final product.

Coating Application:

The aluminum foil is coated with a layer of polyamide (PA) and polyvinyl chloride (PVC). The coating is applied to both sides of the foil, ensuring uniform coverage. The combination of these materials enhances the foil’s barrier properties, flexibility, and overall performance.

Lamination Process:

The coated aluminum foil undergoes a lamination process, where the layers of polyamide and PVC are securely bonded to the aluminum surface. Lamination is typically achieved through heat and pressure, creating a strong and integrated composite material.

Cold-Forming Process:

The composite material is then subjected to a cold-forming process. Cold forming involves shaping the material at temperatures below its recrystallization point. This process imparts rigidity to the foil, allowing it to maintain its form and structure without becoming too pliable.

Printing (Optional):

If required, the Cold Forming pharmaceutical foil may undergo a printing process for branding, product information, or regulatory markings. Printing is often done using specialized inks that adhere well to the foil’s surface.

Cutting and Slitting:

The cold-formed aluminum foil is cut or slit into the desired dimensions. This can vary based on the specific application and packaging requirements. Precision in cutting is crucial to ensure the uniformity of the final product.

Quality Control:

Throughout the manufacturing process, quality control measures are implemented to ensure that the cold-forming aluminum foil meets specified standards. Inspections may include checks for thickness, coating uniformity, adhesion strength, and overall structural integrity.

Packaging and Distribution:

The final cold-forming aluminum foil rolls or sheets are packaged for distribution. Proper packaging is crucial to protect the foil from damage during transportation and storage. The finished product is then distributed to manufacturers in industries such as pharmaceuticals for further use in packaging applications.

8021 pharmaceutical aluminum foil

8021 pharmaceutical aluminum foil

By following these key steps in the manufacturing process, Cold Forming pharmaceutical foil is produced with the necessary properties to meet the stringent requirements of industries where a combination of strength, flexibility, and barrier protection is essential.

Processing requirements for Cold Forming pharmaceutical aluminum foil

  • 1. Flat plate shape;
  • 2. Strict requirements on the plate surface, no black oil spots, scratches, small black silk, bright lines, roller-printed concave and convex points, mosquitoes, etc.;
  • 3. No pinholes or holes, and pinholes must be eliminated if found;
  • 4. Edge cutting quality, no burrs, towers, layer channeling, lotus leaf edges, flanges, and concave and convex lighting phenomena;
  • 5. Water brushing must meet Class A standards;
  • 6. Packaging should be moisture-proof to avoid oxidation.

More Pharmaceutical Aluminum Foil Products Visit: Huawei Pharma Foil Packaging

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