Packaging Crash Course - O.Berk

Liner Materials

Liner Materials Packaging Resource

At O. BERK, a wide range of closure sizes in various materials are available from stock with these liner systems:

  1. Pulp/Aluminum Foil

    This material is relatively free of odor and taste problems. Used for non-acid, non-alkaline products. Has been used for organic solvents, chrome cleaners, brake fluids, mineral oils, among other products.

  2. Pulp/Tin Foil

    Possesses good resistance to hydrocarbons, alcohols, ketones and oils. Not good for acids and alkalis.

  3. Pulp/Polyvinyl Lubricant Film

    Good general purpose liner for food, beverage, medical and chemicals.

  4. Pulp/Saran Lubricant Film

    High chemical resistance. Excellent gas and moisture vapor transmission resistance. Good taste and odor resistance makes it a good choice for cooking oils and salad dressing.

  5. Solid Polyethylene

    Good chemical resistance and low moisture vapor transmission rate. Used widely for non-oil products filled at room temperature.

  6. F-217

    Three –ply co-extruded material; Foamed Low Density Polyethylene Core Between Two Solid Layers Of Low Density Polyethylene. F-217 is a Trademark of TriSeal a Tekniplex Corporation. Excellent chemical resistance and low moisture vapor transmission rate. Good taste and odor resistance.

  7. Pulp/Oil Paper

    Good resistance to moisture permeation. Used for pickles, olives, cherries, vinegar, etc.

  8. Plastisol

    Provides excellent resistance to mild acids as in food products. Permits "hot fill" operations to effectively produce a vacuum seal. A properly selected Plastisol is particularly useful for processed foods because it resists food acid and will withstand sterilization.

  9. Induction Sealing

    Induction sealing is a noncontact heating process that accomplishes the hermetic sealing of a container with a closure that includes a heat-sealable foil laminate. The typical induction innerseal begins as a multi-laminate liner inside a closure. It consists of a layer of pulpboard, a layer of wax, aluminum foil and a layer of polymer that is compatible with the bottle material and capable of heat sealing to the lip of the container. When the closure is placed onto the container and is passed through an electromagnetic field produced by the induction heater, several things occur. An electromagnetic current, called an eddy current, is induced into the foil portion, resulting in a resistance-type heating effect. The heated foil melts the wax layer, which is absorbed into the pulpboard, releasing the foil from the pulpboard, and the polymer coating melts, hermetically sealing the foil to the lip of the container.

Posted by Jonathan
on 01/01/2009
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