SealerOn™

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:

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.

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.

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!

https://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!

The Video Below, with SealerOn™ Breakthrough Glass Induction Sealing Material, demonstrates how easy it is to apply an induction seal onto a glass pack that is using a plastic lid.

Heat Shrink Bands

Heat Shrink Bands can often be a very user unfriendly part of packaging for products in Glass.

Clients purchasing products in Glass often do so with the thought that is it premium packaging preserving the purity of the product.

They can also expect there is environmental benefits as the packaging is easily identified and separated for recycling.
When faced with removing (with some difficulty) a super lightweight piece of unknown plastic (often PVC), it is clear this is a near transparent piece of plastic that could be even more devastating than plastic bags; perhaps the perfect “turtle (marine life) choker”.

On the production side of things, applying heat shrink bands can be a tricky and sometimes dangerous set-up. It involves high temperature heat guns, blowers or steam tunnels. It also involves dealing with a lightweight film in individual pieces or in tube form where consistent placement and finish can be very difficult.

Universal Induction Foils

For a long time, universal induction foils for glass have been available, however, they have proven to be effective mainly for dry products and powders. Wet or oily products can appear to be sealed by these universal foils, however, in time what looked like well sealed products end up having a foil that lifts off the sealing rim “on its own”.

Glass Induction Material

SealerOn™ breakthrough glass induction sealing material has been shown to work on wet products and oily products such as coconut oil.

At SealerOn™ we have solutions to seal glass with Plastic Caps and we even have solutions to Induction seal Glass that has metal caps!

At our sister Tradename LabelOn™ we have solutions to do away with the turtle chokers using labels;

Talk to us about how to enhance the User and your Production line experience.

Click the Link:

Or for an instant chat, Click the Link:

Note the induction sealing machine used in this video is the SealerOn™ Mini
See: https://sealeron.com/v/mini01
it is designed to feed directly on a LabelOn™ Mini Synergy machine
See: https://view.label-on.com/lmsbcdvswrap

SealerOn™ Capless Induction Sealing Glass Bottles Metal Lid – YouTube
https://sealeron.com/v/glass5head

Tamper Evident Jar Labeling – LabelOn™ – YouTube
https://view.label-on.com/tamperevident

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”.

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.

2. 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.

3. 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.

4. 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.

2. 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.

This discussion below is an excerpt of a client discussion we have prior to supplying equipment.

We don’t have to do this; we could be like the ebay or Alibaba or “one stop every machine under the sun supplier” but we are not as we like to think of ourselves as a supplier invited to be a part of your team going forward.

The discussion:

“Hi Team,

I can see there is significant concern over the advice  you are receiving about the cap lining material.

The cap lining material specification you sent is the correct “type” of lining material in that it has the correct sealing layer.

We can test seal all the Jars and produce excellent sealing; the sample size is only a dozen or so – this could lead you into a false sense of security if we did not forewarn you the combination of material should have softness in it.

Our knowledge on the matter is significant; beyond most suppliers of induction equipment as we have significant experience in supplying cap lining material to cap manufacturers and even the high ticket equipment that inserts the cap lining material for the cap manufacturers.  See our website: https://www.capliningmaterial.com/

I have personally been involved in the selection of induction sealing materials for projects by multibillion dollar companies including Nestle and I have dealt personally with the world’s top 5  cap lining material manufacturers.

The  advice below stands:

Hand Torque is part of the equation. Though a poorly applied cap ; even when it has soft lining material or a foam backing can result in unsealed products.

The part I am focussing on is cap and bottle tolerances. I am not sure the cap manufacturer will give a cap tolerance for the flatness of their caps to within +/- 0.2mm.

Similarly the bottle/jar manufacturer may not give a height/flatness tolerance to within +/- 0.2mm with respect to the plain of the top lip of the container. From quality manufacturers, most of the caps/jars may fall within this tolerance though there will be a statistical amount that are outside of this; when tolerances add you can get a case where a 0.25mm thick hard liner will not have enough give to make up for the mismatch of the top plane of the jar neck with the underside plane of the cap.  In this case there will be sections of the liner that are not in contact with the jar during the sealing process.

Standard practice is to have some softness behind the liners or very tight control on the capping process and the allowable tolerances on the caps and bottles provided.

For your operations – especially as you are growing it is highly recommended you have either:

a) Softness in one of the layers of the induction lining material

Or

b) A separate foam liner behind the induction liner

Note: for higher volume hand operations we recommend  a cap tightener due to the inevitable human error factor

 “The purchasing decision to focus on here is the caps and the lining material.

1. If I was an owner in your business I would suggest the following path.

If time is against you – for your initial launch etc- ; go with what you have and perform a 100% test on what you seal before you send it out.  If we are talking about only hundreds of units at a time it is a cumbersome, but, worthwhile task.

First impressions are everything at that stage and a leaking jar of product can be a “game over” at this stage.
Here’s a video of a suggested test that can help you be confident you have a sealed Jar:

2.  Going down the track insure you have some softness in your cap/liner combination.”

If your cap supplier can’t do it (maybe because your volumes are too small) you should purchase the caps without liners and source liners from a liner supplier for separate insertion prior to sealing; you will need to source about 10,000 at about 12 cents each (my guess) – We can put you in touch with the supplier to the liners for the  SealerOn gallery I showed you for the Nuts.

We want you to move forward with a sound understanding of how you can reduce the statistical probability of sending out products that could leak.