Selecting the proper cap liner is critical to completion of your package. At Cleveland Bottle & Supply Co. we offer many different caps with a variety of liners. In selecting a liner you need to consider the chemical resistance or moisture barriers that a particular liner offers. The liners we carry are listed below with definitional information important for you to consider. Always remember that you must first thoroughly test you cap, liner and container together for proper fit and chemical properties.
Foam liners tend to be used in many common caps. A foam liner, as it name implies, has a thin low density foam ring, which is sandwiched between two layers of low density polyethylene (LDPE) film. When chemical resistance or low moisture transmission is important, you will want to select a Foam Liner. You will also find that these liners protect from odor transmission and do not impact the taste of food products in the container. Very often you will see these referred to as “F-217™” or “Sureseal™” liners, which is an industry trade name.
Induction / Heal Seal Liners
When you need to have a tamper evident seal to your bottle, a good solution is the Induction or Heat Seal Liner. The installation of this liner requires a special piece of equipment, which allows a foil liner to be tightly sealed to the top of the container. These are often used when air needs to be removed from the container, and/or product security is an issue. You will see this often used in the food pharmaceutical industries.
Plastisol Liners are very popular in the food industry for canning, hot sauces, barbecue sauces and many other applications. They are a unique liner in that they create a vacuum seal as product cools in the container.
Polyseal Cone Liners
Polyseal Cone Liners are usually used for liquid products. They are made of low density polyethylene (LDPE). This liner provides a seal both on the top of the container (outer diameter) and across the inside of the container (inner diameter), resulting in a strong wedge type seal. This liner is designed to resist cracking from stress caused when the cap is applied to the container.
Pressure Seal Liner
The Pressure Seal Liner is a foam liner that has an adhesive side designed to stick on the opening of the container. A “seal” is accomplished with the normal closing of the container, without any special type of equipment. When the cap is removed from the container the film seal remains on the opening offering both protection and security for the product inside. This liner is designed for dry powder products. The packaging industry will often call this a “PS-22” liner.
Pulp and Vinyl Liner
The Pulp and Vinyl Liner, for metal caps, is an excellent liner for chemical resistance. It therefore works well with solvents, alcohols, mild acids, alkalis and other chemically based products. This liner has a vinyl film that adheres to a white pulp (paper) backing. The Pulp and Vinyl Liner is not designed for bleaches or active hydrocarbons. This liner can also be known as a poly-vinyl liner.
Pulp and Aluminum Foil Liner
With the Pulp and Aluminum Foil Liner you get a polyester film that is laminated to aluminum foil, which adheres to a pulp board. These liners come in metal caps in a variety of sizes. These liners a excellent for containers that have hydro carbon type products. Included here are alcohols, ketones and other oils. Caps with Pulp and Aluminum Foils do not work with acids or alkalis.
Pulp and Oil Liner
Pulp and Oil Liners are used primarily in metal closures. They provide resistance to chemical products that react negatively to polyethylene liners. Pulp and Oil Liners are often used with acidic type food products.
Pulp and Poly Liner
Pulp and Poly Liners are excellent for cold-fill, non-acidic food products and powders. You might find these used in food supplement packaging.
It is the customer’s responsibility to check and test the compatibility of the product with the container and closure. Cleveland Bottle & Supply Co. assumes no responsibility for product and container / closure compatibility. Caps and closure options presented will fit the container selected, however, are not necessarily recommended.