SealerOn2023

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.