Induction Sealing

what is induction
sealing

Induction sealing creates a hermetic seal by passing a capped bottle under the induction sealer in a non-contact process. The system’s sealing head produces an electromagnetic field that heats up the foil liner inside the cap. The hot foil in turn melts the polymer coating on the inner-seal. The heat, coupled with the pressure of the cap, causes the inner-seal to bond to the lip of the container resulting in a hermetic seal.

Induction sealing, also known as cap sealing, is a common method used in packaging to create a hermetic seal on containers like bottles and jars. This process involves the use of electromagnetic induction to generate heat in a specialized foil liner that is adhered to the container’s opening or closure. The heat causes the foil liner to melt and bond to the container, providing a secure and tamper-evident seal.

  • Extended Shelf Life
    Liners help preserve the quality of the products, reducing the likelihood of spoilage or degradation over time.
  • Chemical Resistance
    It is suitable for a wide range of industries, including those that produce agrochemicals, household cleaners, and food supplements.
Technical document
Contact Sales Persons
Shakti-Pundi
Shakti Pundir
GM – INTERNATIONAL BUSINESS
munir
Munir Mohammed
DGM - DOMESTIC BUSINESS
Foil Liner Preparation

Manufacturers often incorporate unique identifiers, such as holograms, watermarks, or printed logos, into the foil liners to enhance product security and brand authenticity.

Container Filling

Containers are filled with the product while maintaining hygiene and ensuring accuracy in weight or volume to meet industry standards.

Capping

The foil liner is placed inside the cap before it is securely applied to the filled container using automated or manual capping systems.

Heating the Foil Liner

The container with the capped foil liner passes under the induction sealer, where an electromagnetic field is generated. This field heats the foil liner and melts the polymer coating.

Cooling and Solidifying

After the polymer melts and bonds to the container’s lip, the seal is cooled and solidified to ensure a durable and airtight closure.

Tamper Evidence

Once sealed, the liner provides tamper-evident protection. Any attempt to open the container results in visible damage to the foil liner, ensuring product safety.

Preservation of Product Quality

Induction sealing helps preserve the freshness, aroma,and quality of the product by preventing contamination, leaks, and exposure to air or moisture.

Efficiency

The induction sealing process is fast and cost-effective, making it suitable for high-volume production lines while maintaining consistent seal quality.

advantages of induction sealing solutions of holoprint

Enhanced Security with Unique Identifiers

Holoprint’s induction sealing solutions incorporate advanced security features such as holograms, watermarks, and unique identifiers on foil liners. This helps in preventing counterfeiting, ensuring product authenticity, and building consumer trust.

Tamper-Evident Protection

The tamper-evident seals provided by Holoprint are highly reliable. Any attempt to open or manipulate the container leaves visible evidence, ensuring the safety and integrity of the product during transit and storage.

Preservation of Product Quality

By creating airtight and hermetic seals, Holoprint’s solutions effectively protect the contents from contamination, moisture, and oxidation. This prolongs shelf life and maintains the freshness and quality of the product.

Efficiency and Compatibility

Holoprint’s induction sealing systems are designed to integrate seamlessly with high-speed production lines. They ensure consistent performance, reduce operational downtime, and are compatible with a wide range of container types and sizes.

Induction sealing, also known as cap sealing, is a widely used packaging method to create a hermetic seal on containers such as bottles and jars. This process relies on electromagnetic induction, which generates heat in a specially designed foil liner placed on the container’s opening. The heat causes the liner to melt and bond securely to the container, creating a tamper-evident and leak-proof seal. This ensures the product’s freshness, safety, and quality, while also enhancing consumer trust.

Induction sealing is ideal for industries like food, pharmaceuticals, and chemicals, where product integrity is paramount. It provides a non-contact sealing solution, making it suitable for various container shapes and materials. Additionally, this method minimizes contamination risks, as the sealing process does not involve direct physical contact with the product or its packaging, ensuring hygienic packaging standards.

Foil liner preparation is an essential step in achieving effective induction sealing. The liner is designed to match the dimensions and properties of the container’s opening or closure. Typically, it comprises multiple layers, including a heat-sensitive sealant, an aluminum foil layer for heat conduction, and a backing material for structural support. This layered composition ensures that the liner can effectively bond with the container while providing a secure seal.

The preparation process involves ensuring the liner is free from damage and contamination to maintain its sealing efficiency. The liner must be correctly positioned on the container’s opening before the induction process begins. Proper preparation not only enhances the strength of the seal but also prevents common issues like incomplete sealing or product leakage, ensuring packaging reliability.

The heating of the foil liner is a critical phase in the induction sealing process. When the container passes under the induction sealing machine, electromagnetic waves generate heat in the aluminum foil layer. This heat melts the sealant layer, causing it to bond tightly to the container’s opening. The process happens within seconds, making it efficient for high-speed production lines while maintaining seal consistency and quality.

The heat generated is precisely controlled to prevent overheating, which could damage the container or compromise the seal. By creating a tamper-evident barrier, the heated foil liner safeguards the product from external contamination and ensures long-term storage stability. This step is fundamental to achieving a reliable and durable seal, which is critical for product safety and transportation.

WORKING PRINCIPLE OF INDUCTION SEALING

Induction sealing operates on the principle of electromagnetic induction, which generates heat to seal a foil liner to the opening of a container. This process involves passing the container under an induction coil that creates an oscillating electromagnetic field. The aluminum layer in the liner absorbs this energy, generating heat that melts the heat-seal layer. The melted layer bonds securely to the container’s rim, creating a tamper-evident and leak-proof seal. This method ensures that the product remains safe, fresh, and free from contamination.

SUSTAINABILITY IN INDUCTION SEALING

Induction sealing contributes to sustainability by reducing product waste and ensuring longer shelf lives. It minimizes the risk of spillage or contamination, which could lead to the disposal of affected products. Moreover, the process is energy-efficient, as it only heats the foil liner without wasting energy on other components. Modern induction sealing systems are designed to be compatible with recyclable or biodegradable packaging materials, aligning with global efforts to reduce environmental impact. This makes induction sealing not only practical but also eco-friendly.

hologramwards-and-seals

related applications

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Induction Seals / Wads

Holographic Wads

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

FMCG

Lubricants

Pharmaceutical

4

Personal Care

Agro

Diary

Technology

Holographic Wads

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Holographic wads with running design

Holographic wads with registered design

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Induction Seals / Wads

Printing Wads

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

FMCG

Lubricants

Pharmaceutical

4

Personal Care

Agro

Diary

Technology

Printing Wads

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Printed Liners with running design

Printer liners with registered design

Registered Printed liners with QR Code

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Induction Seals / Wads

High Chemical liners

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

FMCG

Pharmaceutical

4

Chemical

Agro

Technology

High Chemical liners

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Holographic

Printing

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Induction Seals / Wads

Glass Wads

Glass

User Industries

FMCG

Chemical

Pharmaceutical

4

Personal Care

Agro

Diary

Technology

Glass Wads

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Holographic

Printing

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Induction Seals / Wads

Lift & Peel

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

FMCG

Chemical

Pharmaceutical

4

Personal Care

Agro

Diary

Technology

Lift & Peel

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Printing - Genric

Printing Customized

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Induction Seals / Wads

Vent Liners

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

Chemical

Agro

Technology

Vent Liners

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Printing - Genric

Printing Customized

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Induction Seals / Wads

EPE Foam

User Industries

FMCG

Chemical

Pharmaceutical

4

Personal Care

Agro

Technology

EPE Foam

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Density - Range: 200-400

Thickness: 0.8mm to 3mm

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Induction Seals / Wads

Pressure Sensitive

User Industries

Pharmaceutical

4

Personal Care

Agro

Technology

Pressure Sensitive

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Density - Range: 200-400

Thickness: 0.8mm to 3mm

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Induction Seals / Wads

Plain Wads

High Density Polythylene
(HDPE)

Polyetheline Terephthalate
(PET)

PP

PS

User Industries

FMCG

Lubricants

Pharmaceutical

4

Personal Care

Agro

Diary

product-image

Plain Wads

Machine artwork is creadted and vector fike are further used to creat several convert and overt features. Files are recoreded in the form of pixels to create Holographic Image in only color of spectrum of Rainbow.

Technology

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