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Making Re-Purposed Glass Packaging Possible with Induction Sealing and SealerOn™

Induction Sealing Glass

The appeal to pack into glass is well documented.

Those seeking products in glass are looking for product that is not tainted by plastic contact.  They are looking for purity in the product and most likely align themselves with the goals of environmental awareness and sustainability.

If packaging can be recycled, that is a big plus to these consumers. If packaging can be re-purposed or go on serve a purpose well beyond a single use, that is ideal.

Almost all Glass Packaging has a Neck with a thread to allow for the placement of a cap.

More often than not, the caps are Metal Caps and this tends to eliminate the prospect for sealing using induction sealing as the induction sealing process usually works with a cap holding the induction sealing liner and passing under a high frequency oscillating magnetic field; the metal caps do not allow this field to reach the induction material.

Food and Cosmetics packed into Glass need

a) A Good Barrier on their Opening.

b) A form of Tamper Evidence.

c) A seal that will not allow for leaking.

 

To achieve a) b) and c) traditional Secondary measures include:

i) Heat Shrink Bands (I refer to the clear versions of these as “turtle chokers”

The application of these Heat Shrink Bands is onerous in production

The removal of the Heat Shrink Bands is onerous on the end user

They are a great source of dust collection

They rely on other properties of the Cap and Capping Equipment to  prevent leaking

ii) Tamper evident Labels applied to the lid with one or more fingers that fold down the sides of the container.

There is clever machinery out there to achieve this see: http://view.label-on.com/jarste

This method also relies on other properties of the Cap and Capping Equipment to prevent leaking.

With new “Break Though Glass Induction Sealing Material” and with a range of standard and Capless Induction Sealing machinery; Adeneli and Benefel can present new and innovative solutions to pack in glass.

To date Glass induction sealing material had been limited, in the main, to dry products such as instant coffee or Gel Capsules and other powders.

Repurposed Thumb

We now have a “Break Though Glass Induction Sealing Material” that works with many liquids including Vegetable based Oils.

 

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.

industrial-safety ImageDuring 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 process 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.

 

 

Cap Lining Materials and Liner Insertion Machines

Cap Lining Materials Adeneli is a supplier of tamper-evident, cap/closure lining materials. Being a small company, we view ourselves as possessing a natural advantage to be more responsive and flexible compared to our competitors. Our mission is to provide our customers with very high levels of responsiveness and flexibility in our offerings, along with identifying their packaging needs not matched by anyone within our industry.

Choosing the right machine for your needs is an important task. Determining the right supplier is even more crucial.

Liner Inserting MachineAdeneli showcases dependable, revolutionary, quality products that include an extensive range of applications like: food, pharmaceutical, agricultural, chemical, beverage, and cosmetics. Our comprehensive selection of lining materials provide us the opportunity to satisfy the most demanding world-wide applications with our customized aluminum foil / heat-seal combinations. Additionally, our unique products offer a built in and easy open feature that delivers greater convenience to the consumer while offering recognition to the brand owners.

Our lining machines insert airtight seals in caps from liner reels or pre-cut  liners. Within our series of products and solutions, we possess different designs which cover various production requirements including cutting power, speed, sizes and shapes of caps to process.

Adeneli  delivers high quality induction Wad Inserting Machine or cap lining and capping machines for various bottle sizes, bottle shapes and production speeds.

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Adeneli Packaging
Los Angeles, CA, USA

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