Closure Liners

Induction Heat Seal Liners Choosing the Right Lining Induction heat seal liners are a specialty type of liner that Material serves as a seal to the bottle or jar, providing an extra layer of protection against leakage as well as functioning as a tamper There are choices when it comes to induction heat seal liners. evident barrier. Selecting the best induction heat seal liner for your product depends on several factors: The main benefits of induction heat seal liners include: • Hermetic seal: The foil liner is welded to the container 1. What material is the container? Some induction heat seal creating a permanent, airtight bond with an impermeable liners are “universal”, meaning they can work on both foil layer. plastic and glass. Other heat seal liners, however, are • Tamper evident seal: Available with options such as Clean material-specific. Peel or Welded Seal. • Ability to Automate: Equipment can be placed over a 2. Do you need the liner to peel away cleanly, without leaving conveyor belt allowing the sealing process to occur with no any residue on the container’s sealing surface (Clean Peel), additional labor cost. or should the liner need to be punctured as clear evidence • Relatively inexpensive. that it was not tampered with (Welded Seal)?

HOW IT WORKS 3. Do you need a lined closure after the tamper evident seal has been removed? If so, is pulp satisfactory or do you Induction sealing is a non-contact process that creates a need a better quality material to keep your package air hermetic seal by means of a heat-sealable foil laminate. The tight? induction inner seal is an aluminum foil liner with a layer of polymer on the side facing the container. In order for the seal 4. If using a heat seal liner in conjunction with a child to function properly, the layer of polymer must be compatible resistant closure, is ease of removal of the closure with the particular type of plastic or glass container. important? To begin the sealing process, the closure is placed onto the container Once you have answered these and passed through an electromagnetic questions, it will be easier to determine field produced by the sealing head. An which type of induction heat seal liner electromagnetic current, called an eddy best suits your needs. current, is induced into the foil layer, resulting in a resistance-type heating effect. As the energy is supplied, the foil is heated causing the polymer coating to melt and bonds the foil to the container. This process creates a hermetic seal between the foil and the sealing surface (also known as the land area) of the container.

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Copyright © 2020 eBottles.com, Inc. All Rights Reserved. OPTIONS Options at a Glance Induction liners are available in one-piece or two-piece BACKING: 2 part liner NO BACKING - 1 part or constructions: w/ wax between layers liner

Two-Piece Liners - Traditional Material CLEAN PEEL or WELDED SEAL (Glued into the Closure) TAB or LIFT N PEEL or NO TAB The two-piece liner is the MATERIAL USED ON: traditional material you may be or UNIVERSAL familiar with. It is commonly (PET/ HDPE) used on plastic motor oil bottles PRINTED “Sealed For and Tylenol bottles. The liner or PLAIN Your Protection” is glued into the closure. A two-piece liner has a wax layer between the foil and pulp board backing. The induction heating Liner Examples: process bonds the foil to the container while also melting the SAFEGUARD 75 - HDPE Welded Seal 2 part liner wax, releasing it from the foil liner. The wax is absorbed into the pulp board backing. The pulp board layer remains inside SAFEGUARD 90 - PET Welded Seal 2 part liner the cap after the foil liner has been removed. The benefit of the glued-in liner is that the foil will not overhang the sealing FS 7-12 - GLASS - Clean Peel 2 part liner surface of the container, which makes the closure easier to open. FS 5-9 - Universal - Clean Peel - Foam/Foil 1 part liner

One-Piece Liners LIFT N PEELw - Universal 1 part liner (Friction Fit) LIFT N PEEL - Universal with PP Foam Liner 1 part liner One-piece liners are friction fit inside the closure - no glue is involved. These types of liners can consist of a foam-backed or HS 035 - Universal - Welded Seal - paper-backed foil laminate. The backing provides structure to Polystyrene Foam/Foil 1 part liner *demonstrated excellent adhesion on glass the thin foil layer.

Lift and Peel liners are a great * The materials of construction of foil liners are closely regulated. Food Contact example of a friction fit liner. A Materials (FCM) Regulation EC 10/2011 (Annex I, Table 1), for example, states closure with these types of liners that petroleum based or synthetic hydrocarbon derived waxes (which are can be supplied with a single frequently used in induction heat sealed liner laminates for glass) must not be liner with no additional backing, used for articles in contact with fatty foods. or they can be double lined with your choice of backing to maintain an airtight seal after the foil is removed.

Friction fit liners are often supplied by closure manufacturers who do not have the ability to glue liners into the closures. Friction fit liners are an inexpensive choice when a lined closure after opening is not required. Interestingly enough, friction fit liners are also the best choice when you want to be able to choose the specific type of liner that remains in the closure after opening. For example, if a pulpboard liner is not satisfactory, a wide range of other liners can be glued into the closure prior to friction fitting the heat seal liner (see options below under “Standard Liners”).

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Foamed Polyethylene (PE) Liners (also known as F-217)

Most of our closures are lined with foamed polyethylene (PE) liners. This is our standard liner for our bud jars. PE liners are composed of a soft polyethylene foam core covered on top and bottom with solid, clear polyethylene and supplied in .035” thickness. PE liners have become the industry standard due to their all-purpose compatibility, resilient, compressible seal, cleanliness (no pulp dust) and economy. PE liners have excellent chemical resistance and a low moisture transmission rate. PE liners also have good taste and odor resistance and are well suited for carbonated beverages.

Foil Liners (Esterfoil)

Esterfoil liners are the standard lining material we offer with our glass concentrate jars. Esterfoil liners are comprised of a polyester film that is laminated to aluminum foil and then bonded to a PE foam backing. The foil material serves as the barrier to volatile terpenes, keeping the product from escaping by means of migrating through the liner and evaporating off. In addition to offering low transmission rates, Esterfoil liners have high chemical resistance, making them an ideal liner for concentrates. Foil liners are not recommended for packaging carbonated beverages.

Teflon Liners (PTFE)

PTFE liners are the premium lining material we offer with our glass concentrate jars. PTFE liners are a two-layer laminate comprised of a PTFE face and a polyethylene foam backing. The PTFE face offers high chemical resistance and is capable of resisting degradation from virtually any chemical at room temperature. The PE foam backing provides a tight, compressed seal that prevents evaporation. Due to their superior properties and enhanced non-stick capabilities, PTFE liners are ideal for use with products like Sauce or Live Resin which are less viscous and tend to stick to the closure liner and jar making it extremely difficult to unscrew the closure.

Pressure Sensitive Liners (PS-22)

These liners are made of a styrene foam material coated on the down facing side with a torque activated adhesive. Pressure-sensitive inner seals adhere to plastic or glass bottles with normal application torque. Pressure sensitive liners are supplied pressed into closures and adhere to the bottle finish when the closure is applied. Pressure sensitive liners stick to the container because one side is coated with pockets of adhesive. When the closure is applied to the container, the pockets of adhesive rupture between the closure and finish of the bottle or jar. The pressure sensitive liners then stick to the bottle or jar and remain in place when the closure is removed. No extra equipment is required. This material needs a dry land area on the bottle and therefore is suitable only for use with dry products such as vitamins, foods and pharmaceuticals. Note: Allow 24 hours for the adhesive to setup prior to removing the closure to test the seal.

Inquire about liner options for your package!

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