Cap Lining Materials and Induction Sealing Machines

Foam Liners Foil Seals for Bottles

Freshness Seals in Container Packaging

    Over the years, foam liners have found increased usage in many fields. As cap lining materials, these products maintain the integrity of a product by preventing exposure to oxygen and moisture from the environment. They also keep the contents from leaks and mishaps especially during transportation and handling. Foam liners, along with other types of cap liners also allow for tamper evidence by demonstrating proof of any disruption in the product barrier. 

Types of Foam Liners

    Due to the varied needs presented by different industries, there are a myriad of cap liners to choose from. What makes choosing the perfect type for your product are the considerations with the material of the liner itself and how compatible the liner is with your product. Depending on what product you aim to produce, there may be additional guidelines to be met such as for the food and beverage industry, as well as for pharmaceuticals. The Food and Drug Administration (FDA) has set guidelines for liners to be used with these products in order to protect the wellbeing of the consumers. 

    In general, cap liners are composed of a laminate of material which are induction sealed onto the mouths of the containers. The cap liners, once adhered onto the container mouth, cannot be reattached without special machinery, so any disruption in this seal can can alert the consumer if any tampering has been performed on the purchased product. Induction Seals One Piece

    As mentioned earlier, there are different liners which cater to different needs of the manufacturer. Broadly, liners can be divided into one- or two-piece liners. One-piece liners are mainly used for dry products and powders. Before opening, these act as freshness seals and maintain the product’s shelf-life. Once opened, the seal is usually discarded. As such, this type of liners are designated as single-use liners. 

Induction Seal Two Piece Liner Precut    The second type is the two-piece liner. These liners differ in that they can be used to reseal the container many times from the initial opening. These liners are better suited for products intended for use over an extended period of time. The two-piece liner is also used for liquids such as oils and seasonings as they are more resilient and leak-proof than their one-piece counterparts. 


Foil Induction Seals as Cap Lining Material

    Foam liners are used in many fields of manufacturing and packaging. These versatile liners are great as freshness seals and are more economical than other types of cap liners. You can choose between the one- or two-piece type to cater to both simpler products or those with more complex requirements.

    These foam liners typically form part of the cap lining material. When the container is opened, the seal is initially disrupted and removed. The foam liner can then be replaced within the cap of the container, serving its purpose of keeping the product fresh and preventing leaks from occurring. 

    The advantages of foam liners are found in their resilience against many chemicals and that they do not disintegrate easily. They are good for many types of solvents and can resist chemical abrasion from alkalis and acids. They also provide sufficient leakage protection for liquid products, hence they are used for seasonings and oils. Foam liners are also used for the pharmaceutical and cosmetics industries, acting as freshness seals for many products. 

Benefel Pty Ltd. and Adeneli Packaging

    Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you choose the perfect foam liners for your products. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

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Foam Liner Freshness Seal

Foil Induction Seals in Caps

    Cap liners are safeguards that keep your product fresher for longer by keeping moisture and oxygen fluctuations at bay. The freshness seals are typically found adhered onto the container mouth through induction sealing or within the cap itself such as in cases of foam liner seals. In some instances, cap liners may come in both configurations within the same container. 

    There are a myriad of cap liners to choose from, all with different applications depending on multiple factors. In order to choose the perfect type for your needs, it is imperative to know the different types of cap liners and what they are composed of. 

    Cap liners are made of laminates of material which pass through the process of induction sealing in order to adhere them to the mouths of the containers. In terms of applications of these foilseals, they may be classified as one- or two-piece liners. 

   One-piece liners are adhered to the container mouth and are removed on the initial opening of the product. These foil seals for bottles are ideal for one-time use and are often discarded after the first opening. This means that it does not come with a guarantee of resealing the product’s freshness once the packaging has been opened. These types of liners are usually used for dried goods and powders as well as types of products expected to be consumed immediately after opening.

    Two-piece liners, on the other hand, can reseal the product because they are not discarded immediately after use. Once the packaging is opened, these foil induction seals retain their use. They are typically used for products which need to be opened repeatedly over a prolonged period of time. This type of capliners can be used for liquids and oils and serve as a better barrier against the elements from the outside, as well as providing the container leak-proofing. 

Foam Liners in Packaging

  Induction Seal Two Piece Liner Precut  Foam liners can come in either the one- or two-piece type. In general, foam liners stay within the cap in order to adequately seal in the product. They are used in a variety of fields such as for the food and beverage industry, pharmaceuticals, industrial chemicals and even cosmetics. 

    Foam liners are a more economical option compared to other types of liners and do offer up their own set of advantages. The foam is able to withstand chemical abrasion such as when exposed to acids and alkalis or even some solvents. Foam liners are also a good material for a variety of liquids such as oils and seasonings—liquids which usually stump other types of foilseal liners when trying to maintain their integrity for prolonged periods of time. 

    These freshness seals are also compatible with a wide range of products and may be perfect for your product as well. 

Foil Seals For Bottles in The Induction Sealing Process

   induction sealing process For liners to adhere sufficiently onto the container mouth, the induction sealing process is employed, utilizing specialized equipment able to meet the demands of large-scale production. Caps come in with the foam liner. Along with the already-filled product container, they make their way down the conveyor line until they reach the induction sealing head. This head emits an electromagnetic field which permeates through the cap. This field generates enough of an electric current in order to melt the film within the liner and adhere it onto the mouth of the container. 

    Once the consumer opens the container, they can remove the seal and place it inside of the cap so the foam liner can do its job of keeping in the freshness and preventing leakage of the product. 

Benefel Pty Ltd. and Adeneli Packaging

    Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you with your foam liner needs. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

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Container Sealing – Sealed for Protection

Product Sealing Methods

    In the past, when it came to container sealing, many manufacturers were faced with the issue of leaky seals, lack of tamper evidence, and problems with keeping their products fresh for consumer use. 

   Container sealing Earlier forms of seal packaging made use of heat shrink bands. These bands were made of PVC plastics which worked for their intended purpose of keeping the contents from leaking. However, these bands were tedious to place onto the container on the part of the manufacturer. For the consumer, the bands served as a barrier between the consumer and the product because of how difficult they were to remove. Additionally, once these bands were removed, they would be very difficult to place back in the container, meaning essentially, they were one-use pieces of plastic and could not adequately keep the product fresh once the container has been opened. 

    Besides these aspects, another issue brought about by heat shrink bands was that they were not environment-friendly at all. And so, with a growing public outcry against one-use plastics, manufacturers turned to another form of container sealing. 

    Universal induction foils were introduced particularly for sealing glass packaging. They allowed for the sealing of glass—a feat that proved quite difficult for many manufacturers. These sealed for your protection foils worked well for a while, especially for dry goods and powders. However, as time went by, many have found a big issue with using these types of cap liners when it comes to liquids.  

    When wet or oily products are placed in these glass containers, the induction foils adhered to the container mouths initially seem to stay. However, over time, the foils tend to lift off of the rim of the container, posing a problem with leakage and issues with the integrity of the product itself. This issue may prove alarming for the consumers themselves, as it can be misconstrued as tampering with the product. 

And so, with all of the issues that arose with this more traditional technology, even universal induction foils no longer cut it for the current generation of consumers. 

Cap Liners and Induction Seal Packaging

    With new technological advancements in cap liner materials and induction sealing, seal packaging is now more efficient and reliable. Cap liners, through the induction sealing process, are able to be processed and adhered to the containers without issue. 

    In the process of induction sealing, caps come into the production line with the liners placed within them. These liners are placed onto the already-filled containers as they pass down the conveyor line. The containers then pass beneath the induction sealing head which emits an electromagnetic field permeating through the cap and the aluminum foil layer in the liner. This field generates an electric current that, when passed through the sealing film, will melt the film, adhering the liner onto the container’s mouth. The film is then allowed to cool as the container proceeds further down the production line. 

    This process allows for proper and reliable adherence of the cap liner to the container, serving its function of leak-proofing. 

Additionally, the liner cannot be reattached without specialized equipment once someone removes said liner from the mouth of the container. This means that the cap liner serves as a form of tamper evident seal, alerting the consumer of issues with product integrity or external meddling with the contents of the container. 

Benefel Pty Ltd. and Adeneli Packaging

    Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you with your container sealing needs. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

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Tamperseal and Precut Cap Liners

Tamper Evident Seal Through Cap Liners

    Cap liners are the key to meeting the ever-increasing demands of consumers for more and more products, without the issue of short shelf lives and leaking containers. These tamper-proof seals keep oxygen and moisture fluctuations at bay, maintain the freshness of the products within the containers and offer sufficient leak-proofing—an added advantage, especially for importations and deliveries. Cap liners also meet one of the most important requirements for product integrity: tamperseal. 

    Tamper evident seals are achieved through the multiple layers that make up these cap liners, all working together to provide proof for the consumer if any untoward tampering of their newly-acquired product has happened. 

    Through the process of induction sealing, a cap liner adheres to the container’s mouth. This tamper evident security seal cannot be reattached once removed, which is one way by which tampering can be demonstrated. And depending on the type of cap liner you choose for your packaging, resealing can still be achieved for subsequent usage, even if the tamperseal has initially been removed by the consumer. 

Why Consumers Trust Cap Liners for Tamper Evidence

    Tamperseal is provided by cap liners in many different products from a multitude of businesses. EverythingInduction-Seal-Two-Piece-Liner from the food and beverage industry, to pharmaceuticals, all the way to agro-industry, consumers put their trust in manufacturers to deliver adequate tamper evidence for their products. This ensures the safety of the consumers and boosts the people’s confidence in the companies which provide these products. Any disruption in this tamper-proofing will alarm the consumer that an outside force has tampered with their product, enough that they will second-guess using the product. This mode of alarm could potentially save many lives. 

    Even the Food and Drug Administration (FDA) has issued guidelines regarding tamperseal in pharmaceuticals and foods to safeguard the public. This simply proves that tamper-proof seal stickers as a mode of tamperseal are recognized as an important public safety tool.

Induction Sealing in The Tamperseal Process

SealMaster ProcessFor cap liners to be placed properly, the induction sealing process must be employed. Induction sealing begins with the caps (and their cap liners) being loaded into the capper. Containers will then be filled with their respective products and capped. Down the conveyor line, these capped containers will continue until they reach the area below the induction sealing head. This part of the induction sealing machine will emit an electromagnetic field that penetrates the cap and the aluminum foil layer within its liner. This field permeates throughout the liner material, causing an electric current to melt the sealing film in the liner. The foil is then allowed to cool down as it leaves the induction field. Once cooled, the tamper-evident bottle seal fully bonds to the mouth of the container. At this point, even when the cap is removed, the cap liner will remain bound to the container’s mouth. 

Once the container is opened by the consumer, the induction-sealed cap liner will adequately show evidence of tampering because this seal cannot be reattached once removed. Anyone who decides to tamper with the tamper-proof seal for bottles will need to use specialized equipment to reattach it to the container’s mouth—a feat for anyone without an induction sealing machine. Therefore, cap liners do their jobs well as tamper evident seals. 

Benefel Pty Ltd. and Adeneli Packaging

    Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you with your tamper-evident seal material and machinery. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

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Tamper Seal Using Pre-cut Cap Liners

Cap liners have opened up a new way of keeping products fresher for longer and allow for more ease in transporting bottles and containers without the inevitable leakage and spills. This technology has also paved the way for the tamper seal by demonstrating even the smallest disruption in the product by an outside force. Therefore, people from both manufacturing and the general public put their trust in cap liners as tamper seals. 

Tamper-evident seals are made of multiple layers of material, all working together to ensure a tight, leak-proof, and tamper-proof seal for bottles. These tamper-evident security seals also go the extra mile to serve as a barrier against moisture and oxygen in order to meet and even lengthen the shelf-life of the product. The tamper-proof seal stickers adhered to the container mouth through the process of induction sealing. Once the tamper-evident bottle seal is removed, the tamper-proof seal for bottles cannot be reattached to the container without specialized equipment, and so, it has become a viable way of tamper evidence for consumers. 

The trust of the people towards this technology also encompasses major industries. For the contract manufacturer, cosmetics companies, boutique and cottage food industry, spice distributors, and small enterprises, the use of the tamper-proof seal for bottles that induction liners provide gives a big boost to their product image and integrity. 

tamper seal
tamper seal

 

Pre-Cut Liners for Tamper Seal

As the industry tries to troubleshoot importation issues on a global scale, finding the cap liners you need can be difficult or even impossible, particularly if the imports are dealt with in smaller quantities. With Benefel Pty Ltd. and Adeneli Packaging, your loose liners and tube-packed, pre-cut liners can be supplied with very short notice and delivered to you in a timely manner. 

We utilize tools able to meet the demands of both large and small enterprises. For smaller-scale and pilot projects, tube-packed pre-cut liners are more adequate as it solves labor considerations and can be combined with cost-effective budget lining machinery.

These tamper seals for bottles, however, are not limited to use for only smaller businesses. In a kind of paradox, the very large-scale projects are also often best served with tube-packed, pre-cut liners. For these production lines, there are many more resources specific to their needs that need to be addressed, and the use of pre-cut liners is able to help with these:

  • The lining machinery necessary is of much higher sophistication compared to smaller-scale industries but the pay-off comes in the better material yield. 
  • Because the tamper seals come in already slit, cut, and processed, the arduous need for maintenance of the materials used for these processes is eliminated. 
  • For waste management, dust and particle factors, as well as waste generated from cutting the roll-form tamper seal for bottle stock, is removed. 
  • Shipping costs for the lining material may be lower for the pre-cut form depending on your location. 

For more innovative ideas, we are able to supply unique types that are specific to the pre-cut format liners. An example of this is liners with backing and pull-tabs. 

Many pre-cut liner manufacturers also have scavenging and recycling techniques in line with their pre-cut operations to make full use of the offcuts generated, thereby resulting in a cleaner environmental footprint for this format of cap-lining material. 

Benefel Pty Ltd. and Adeneli Packaging

Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you with your tamper seal material. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

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Glass Jar Seal and Glass Induction Sealing with SealerOn™

Traditional glass jar seal techniques no longer cut it when it comes to the average consumer’s needs. More and more people value a product’s longevity through the provision of reliable oxygen and moisture barrier. Along with this is the necessity for tamper evidence, particularly for products such as food and pharmaceuticals. And for the benefit of everyone involved in the process of product procurement, all the way to consumption of the said product, a leak-proof approach is more than necessary. 

In the past, glass jar seals were often quite unreliable. Consumers faced the dilemma of sub-par seals or foil seals that made it too difficult to get to the product itself. For the part of the manufacturer, the process of adhesion of the seals onto the glass containers was very daunting and more often than not, ended up with inadequate results. Manufacturers were forced to rely on heat shrink bands to achieve a seal that kept the product within the container but these bands were too finicky for consumers to remove. These issues have now been remedied, thanks to glass jar sealing technology. 

Many consumers prefer to purchase products in glass jars. They often do so with the thought that glass is more premium packaging over plastics as the glass is viewed to preserve the “purity” of the product. They also rely on this packaging to be of more environmental benefit and can easily be separated for recycling. As such, the need to make our customers’ lives easier is a foremost demand in almost any industry.

 

Primitive Glass Bottle Sealing

Shrink Film as Tamper Evident Seal

Older technology for sealing glass jars made use of heat shrink bands and unreliable universal induction foils. 

Heat shrink bands can be a fickle tool to use. On the production side of things, applying heat shrink bands onto the glass jar can be a tricky and sometimes dangerous setup. It involves high-temperature heat guns, blowers, or steam tunnels. It also deals with a lightweight film that could come either in individual pieces or in tube form. This film format necessitates consistent placement and finishes which can be arduous to have to meet each time. 

For clients, heat shrink bands can bring a very unfriendly user experience. These bands are difficult to remove. And with the idea in the consumers’ minds that “glass = good for the environment,” having to remove a piece of transparent PVC plastic the very first moment they need to use the product, can be quite off-putting. 

On the other hand, some manufacturers decided to use universal induction foils for glass sealing. Even at the time, these induction foils for glass had already been available for a long while. However, this technology proved to be effective mainly for dry products and powders only. Wet or oily products can initially appear to be sealed with said foils, but over time, what looked like well-sealed products ended up having a foil that lifted off the sealing rim “on its own.”

Now, in a time when consumers value good quality and trust in the products they use, having foil seals for bottles that detach themselves from the glass jar can be detrimental to sales. 

 

Glass Liners

glass jar seal

In recent years, there have been advances in glass jar sealing. Innovation in the field has now given manufacturers the opportunity to seal not just dried goods in glass jars, but also wet and/or oily products such as coconut oil. With our team’s solutions, we are also able to cater to this growing demand both from manufacturers and their consumers. 

 

Benefel Pty Ltd and Adeneli Packaging

Our teams at Benefel Pty Ltd. and Adeneli Packaging can help you with your glass jar seal material. Our experts are on standby to take your calls and chats. Whatever product you may have, we have the perfect liner material for you. Product consultation is free and we are happy to develop partnerships with our customers by supplying consumable products that work well with packaging machinery.

 

Affordble Induction Machine
Tamper Evident Jar Labeling - LabelOn™
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Investigating Glass Induction Sealing

Below are excerpts from an email that was sent for an inquiry which we published on this blog as part of FAQ.

Thank you for your earlier messages and a link you sent I see the glass you are considering to use for induction sealing looks like the following:

drinking glass for induction sealing

Your Questions 01:
It has been confusing, because I have gotten or read contradicting things. Mostly I have been told that we should use CONDUCTION machines for glass, because most INDUCTION relies on caps. I have also been told that there is only one kind of liner/seal that works on glass, and that is called INDUCTION (very confusing).

I believe both of your companies Adeneli and SealOn only make INDUCTION machines, and lids/seals for INDUCTION machines, not CONDUCTION. Is this correct?

Even though I read on your website, that INDUCTION LINERS only work on INDUCTION machines, again that contradicts what others have said so I wondered if you could elaborate on that. Why do you say it won’t work with CONDUCTION machines?

Even though I read on your website, that INDUCTION LINERS only work on INDUCTION machines, again that contradicts what others have said so I wondered if you could elaborate on that. Why do you say it won’t work with CONDUCTION machines?

Our Answers01:
Our specialty is Induction Machinery.

We can tell you that usually induction sealing is done on products that have caps because the induction seal is held in the cap against the containers sealing edge with some cap tightening force for the induction cycle.

Where there is no cap on the product or where the cap interferes with the induction process (either it has Metal content or is an unusual shape) we have a very special range of induction sealers called “Capless Induction Machines”

Glass Induction Sealing is a tricky area of induction sealing dependent on the glass and the contents as it involves a hot melt adhesive layer which will perform quite differently depending on:

-The glass
-The contents
-The induction sealing material
– The induction sealing parameters including:
– The length of the induction cycle
– The Intensity and the “profile” of the induction cycle
– The pressure on the seal during the induction cycle
– The cooling period before releasing the pressure of the sealing head
– The shape of the induction coil; sometimes it needs to extend “around” the lip of the container
– The dead fold properties of the foil

Heat Conduction machines are NOT our specialty, however, I can tell you they rely on a sealing surface to be heated using heating elements and the sealing surface needs to maintain a temperature that is in a range that suits the sealing material and the container such that the sealing material and the container can fuse/melt together.

When sealing onto Plastic , which is not much of a heat sink, maintaining the sealing surface temperature is quite straight forward and you can expect the material and container to fuse/melt together.

The heat source for an induction machine is the induction process onto the sealing foil – it is an instant source of heat for the period of the induction cycle. When sealing onto glass it is usually a process of melting an adhesive (under pressure), and allowing the adhesive to cool/set before you release the pressure

Your Questions 02:
I see that you say you have cap-less that works on glass but I can’t tell if they can be custom printed, and roll over the sides like we want. I also can’t tell if you have smaller scale, table top machines, that are manual or semi-automatic that would work for the cap-less glass application. I doubt we could invest in a large conveyor belt automatic machine at this time.

Containers-I have also read about possible specially treated glass for using foil lids, but I can’t tell if this is a necessity or not and if so how to go about it. The place I read this regarded yogurt, and since ours is not a food product or liquid or powder, I wonder if this treated glass makes the bond much stronger for those purposes but that it would still seal without treated glass. Because for our purposes it would not have to be overly strong, and we want to have it fold down the sides which would help secure it.

Our Answers02:
On our side we can provide glass sealing induction foil.
For induction foil the MOQ of foil is 3000m² = 32000ft² – Probably too much for a pilot operation
If your Glass opening was 75mm or 3” in Diameter that would equate to about 470,000 Glasses
We can also supply this material in much smaller quantity without printing – MOQ about 10,000 candles worth.

The entry level machine that we are confident works with our Material (subject to tests) is our Benchtop Capless Machine.

SealerOnCaplessKRPreview

The Sealed finish is as you see it in the video – a little bit wrapped down the side but not much.

As your contents are not food and essentially dry it should be straight forward, however, if your product contains essential oils these can wear away at a what looks like a good induction seal; so you need to test the longevity of the seal.

For more of a wrap down the sides it can be done, though, for pilot operations the material needs to be supplied pre-formed.

Pre-formed liners require tooling charges and the pre-formed liners are a lot more expensive than simple pre-cut flat liners.

Again, for pre-printed you need to purchase that MOQ.

formed seales for glass capless precut

Note with plain liners you can always get labels to apply to the sealed glass. We have label partners we can put you in contact with.

We also have the ability to provide you with the Epson Colorworks printers where you can print your own labels.
I hope this is a good start for your look into machinery and materials to achieve the induction sealing across the top of your products packaged into Re-purposed Glass.

If you are looking for affordable and trustworthy Labelling, Sealing, and packaging machinery, visit Adeneli Packaging websites and talk to one of our machine specialists,

Give us a call at (844)-233-6354 (844-ADENELI) or click the direct chat link below!

chatnowtransparent

http://adenelipackaging.com – https://label-on.com/ – https://sealeron.com – https://capliningmaterial.com

*Labeling vs Labelling: We understand that you may see ‘labeling machines’ and ‘labelling machines’ within our web content. These are synonymous- just spelled differently in different regions of the world. We want our posts to be available to our world-wide audience, so we freely interchange the spelling to encourage easy searching for our content. Please rest assured, we are doing this on purpose!

Treating Induction Liners as Contents

Food Grade Induction Liners

Big Brand Cosmetic and Food Companies value their product being produced in Western Countries like the USA, Canada, Australia, New Zealand, The UK, Germany and France.

For example, a Salt Scrub that says produced in Canada carries a lot more appeal to clients and Brand owners alike than a product that says “Made in China”; Especially a product that you will Ingest or put into Direct Contact with your Body.  The reasons are really quite obvious – it is common knowledge that in some parts of Asia where there is a huge ether of manufacturing, completely regulating all practices to be safe is a very difficult task. This leaves open an unacceptable risk for many consumers who will understand that “somewhere” in the chain of processes that go into the finished product something can more easily go wrong.

It is not uncommon to source packaging from Asia and then produce the contents in a more controlled and higher profile country or location.

If the brand (and clients) see value in knowing the contents are produced in a safe and controlled location then Induction Liners should NOT be considered as separate from the contents or as simply “inert” packaging.

Safe Induction Liners

The sealing layer of an induction cap liner that comes into contact with the inside area of your packaging is a plastic polymer and or an adhesive. Often cap suppliers will provide this lining material without paperwork to identify and qualify the material fit/safe for purpose. For example the liner may only be suitable for industrial chemical contents.

During the induction sealing process, the lining material is heated to a point where their sealing polymers and adhesive are in a liquid/molten state. This can OFTEN mean liners from unknown suppliers in China will have a polymer cocktail that can leach into your (your clients) product*.

The process of induction sealing could therefore result in some nasty compounds becoming an extra unintended ingredient in the product.

Please be assured that we are only raising this point to make sure you are aware of this possibility and to allow your client and you to complete a due diligence for the manufacturing of a product that will be in contact with people’s skin.

From our experience, the least that can be expected from a supplier of caps with lining material is to be given a cap lining certificate of compliance with food and commodities; supplied, on the letter head of the manufacturer of the lining material. It is not sufficient to have such a document issued by the cap supplier or a lining material agent that simply puts their letter head at the top of a generic declaration.

“Food for thought”

All our liners are manufactured using lining materials that have a cap lining certificate of compliance with food and commodities; supplied, on the letter head of the manufacturer of the lining material.

*Even the Foam we supply for fitting behind induction liners is resistant to the heat process of the Induction Sealing and this foam comes with it’s own certificate of compliance with food and commodities.

Often the first thing our clients realized with respect to how things can go wrong with Seals from Asia or India is inconsistency of sealing results. That problem , while a practical problem is a relatively minor problem. That is a relatively safe issue and it is well-known that this will often be due to variations from batch to batch of liners produced in these regions.

The safest way to treat induction lining material (and source it) is as if it were the contents.

Cap Liner Types and Functions

A cap liner is a piece of material that sits between the cap and the bottle. Its traditional primary purposes are to offer proper sealing of the product to prevent leakage and optionally to provide tamper evidence.

New technology is now turning this humble piece of packaging into a multimedia gateway for brands to reach out to their consumers through the Tribe Platform.

Since the cap liner is something only seen by the consumer after the product has been opened, the cap liner can essentially facilitate a “cap coupon”.

Tribe Example on Cap Liners

Since the cap liner is in direct contact with the product, chemical compatibility and correct certification for contact with your kind of product is crucial. Using the wrong seal can lead to expensive and sometimes dangerous mistakes that can jeopardize your product brand and integrity.

Chemical products and consumer/food products can require liners that differ significantly in their properties. The varying liner materials have different jobs. They may be used as any combination of moisture barriers, oxygen barriers, chemical resistant barriers, consumer tamper evidence safety and for preventing leakage.

The cap liner material alone can significantly affect the cost of the cap, not to mention the impact on the finished product.

Compatibility of the caps, liners and bottles has to be tested; as well as the compatibility of these packaging materials to the product inside.

Selecting the Right Seal

Novice producers may find it difficult to decide which cap liner is the right solution for their product. With all the different liner types available, choosing the correct liner for your product and container is an important step.  If considering cap lining material it may be worthwhile looking at how a practical packaging initiative and a practical marketing initiative can be combined.

A wide range of cap seals are available but by focusing on these key questions, we should be able to narrow down the field:

  • Level of tamper evidence required?
  • Type of product: liquid, powder, or solid?
  • After opening the product is a reseal important?
  • Will the Seal be used to promote the Brand?

Some Popular Cap Liners

  1. Plain Expanded PE foam. Providing both a seal and reseal, this is one of the lowest cost cap lining materials available.  When produced using C02 Gas the cell structure of this material can be tight and present and perform close to that of some laminated foams produced with less sophisticated methods.
  1. Laminated Expanded PE foam. As per the Plain foam this material has added layers often on both sides to provide a smoother and more chemically resistant sealing surface. With the right laminates this material can have Good resistance to acid, alkalis, solvents, alcohols, oils, household cosmetics, and aqueous products. Aluminum, Tin or Saran are common coatings used for alcohol with Tin being particularly popular for Wine bottles with screw caps.
  1. Pressure Seal Foam Liner. Coated with torque-activated adhesive, the action of applying the cap causes this seal to bond with the bottle or product opening; there is no need for an outside heat source. Historically this type of seal was applied to provide tamper evidence and often printed with words that would infer that the seal was a form of tamper evidence. You will now notice that on any credible supplier’s specification sheet they will go out of their way to state this is NOT a seal to provide tamper evidence.  This is to avoid potential legal claims associated with the possibility this type of seal can be tampered with and reapplied without any special equipment. The Moisture and oxygen barrier of this type of material is also generally lower than laminated foams.
  1. Induction Liners – When passed through an induction process, the foil layer heats up in a process that will bond all or part of the lining material to the top of the product. Induction liners can only be applied using an Induction Sealing Machine.

There are 2 types of Induction Liners:

  1. One-piece Foil. Since it “sticks” to the bottle after sealing, this single-use foil is one of the most common forms of sealing. Side tabs and Lift ‘n’ Peel™ options add to the experience of easy removal from the lid for items like milk and juices. An added barrier layer can also provide protection against aggressive products. An air and watertight hermetic seal prevents leakage in packaging for edible oils, water, juices, condiments, shampoos & conditioners, gasoline treatments, additives, food & beverages, nutraceutical products, health & beauty products, vitamins, spices, and pharmaceutical products.  Often a one piece Foil will need to be applied over a softer and thicker foam based liner to insure a good distribution of pressure from the cap over the entire opening of the product to be sealed.
  1. Two-piece Heat Induction Liner – The benefit of using two-piece heat induction liners is that they eliminate the need for lining the closure in two separate stages: The base foam or cardboard layer of the  liner is temporarily bonded to the foil with either a wax and paper layer or a separating polymer layer.

Induction Material Liner

Material Liner is what we call that piece (or pieces) of what looks like paper inside product caps. It is also referred to as induction foil, induction sealing material, foil seals and induction seals among others. Many people are unaware of the purpose they serve to the product aside from being a protection seal or a tamper proof seal.

Material Liner Purpose

Material liner within caps can be one piece or two pieces depending on the expected purpose of the lining material.

Single piece cap linersSingle piece cap liners are often present in smaller sized containers in which the product is likely to be consumed after opening. Its packaging is regarded as being one time use packaging.  In this instance, the liner functions as protection until the product is opened. No other material is left inside the cap.

 

 

Two Piece Material LinerLarger packs or bottled items are not likely to be completely consumed right after opening. The consumer is more anticipated to reclose the container and store the product. The caps used on these conditions have demands for caps that reseals effectively. Upon close examination, the caps used on these kinds of merchandise have laminated foam within. This lamination enables the cap to reseal the container upon closing to maintain product freshness.  The laminations within the cap as well as the removed tamper evident seal on the product are referred to as two-piece cap liners.

Deciding on the best components and structure of your foil seal is essential to guarantee the proper amount of protection for your merchandise. We can help you in selecting the type of material as well as the construction suitable to your application.

We have induction sealing materials available in many variants to fulfil almost any standard or individualized product packaging requirement which are safe and meet the strict specifications set by the Food and Drugs Authority.

Effective for products that must be kept free from contamination, oxidation and moisture, tamper evident hermetic seals are best suited for use in the following production:

  1. Food & Beverage
  2. Drugs
  3. Alkalies
  4. Acids
  5. Oils
  6. Organic solvents and products
  7. Flammables,
  8. Powders
  9. Pellets
  10. Other products

Induction foils are generally supplied to the closure manufacturers. Developed over 35 years ago, induction sealing, in the beginning, was designed to eliminate leakage of chemicals from plastic bottle caps. At present, this method works extremely well with most style container and closure.

Induction Sealing Process

The caps are supplied with an induction foil waiting to load into the capper. The container is then filled and capped, using the caps that are pre-lined with the induction foils.

The capped container is then transported down the conveyor line and travels underneath the induction sealing head. The electromagnetic field generated by the sealing head penetrates the cap and the aluminum foil layer. When the field permeates the foil, it causes an electrical current which melts the liner’s sealing film. The foil cools down as it leaves the induction field causing the heat seal film bond to the container. Once the cap is removed, the aluminum foil remains bonded to the lip of the container.

You can trust our team of experts to provide you the best solution to your application requirement. Contact us today!

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