Induction sealing
Induction sealing is a non-contact method of heating a metallic disk to seal the top of plastic and glass containers. This process is widely used in various industries, including food, pharmaceuticals, and chemicals, to ensure product integrity and prevent tampering.
Process[edit | edit source]
The induction sealing process involves placing a foil disk inside the cap of a container. When the container passes under an induction coil, an electromagnetic field heats the foil. The heat generated melts the adhesive layer on the foil, bonding it to the container's rim. This creates a hermetic seal that is tamper-evident and leak-proof.
Components[edit | edit source]
The main components of an induction sealing system include:
- Induction coil: Generates the electromagnetic field.
- Power supply: Provides the necessary energy to the induction coil.
- Foil seal: Typically consists of multiple layers, including a paperboard layer, a wax layer, an aluminum foil layer, and a heat-sealable polymer layer.
Applications[edit | edit source]
Induction sealing is used in various applications, such as:
- Food and beverage industry: To seal containers of milk, juice, sauces, and other perishable items.
- Pharmaceutical industry: To ensure the integrity of medicine bottles and prevent contamination.
- Chemical industry: To seal containers of pesticides, herbicides, and other hazardous materials.
Advantages[edit | edit source]
Some of the key advantages of induction sealing include:
- Tamper evidence: Provides a visible indication if the seal has been broken.
- Leak prevention: Ensures that the contents of the container do not leak.
- Extended shelf life: Helps in preserving the freshness and quality of the product.
- Non-contact process: Reduces the risk of contamination during the sealing process.
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References[edit | edit source]
External Links[edit | edit source]
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Contributors: Prab R. Tumpati, MD
