Liners can be confusing…here
is the information that we have compiled on the types of liners that come with
our various products.
1. F217 has a low density foam core between two solid layers of low density
polyethylene. F217 has excellent odor resistance and chemical resistance.
Application: General purpose. Used to seal cosmetics, liquors, drugs, foods and
other products. If something says that it has a PE liner, this is probably the
type of liner it has. This is a very common liner. You will see these on many
of our products, most commonly on ribbed polypropylene caps.
2. The Poly-cone liner is a cone shape LDPE liner. You will see it listed as “P”. We offer this type of liner
with some of our glass bottles and jars.
3. The PVLF liner is a pulp and vinyl
lubricated film. A poly-vinyl coating is applied to a pulp paper backing. You will see it listed as “PV”. It is a good liner type for chemical
resistance. We offer this type of liner with some of our glass bottles and
PS = Pressure Sensitive (PS 22 or PS 113):
Pressure Sensitive adhesive, coated on polystyrene foam liner, with one
adhesive side that sticks to the container. Pressure is applied to the closure
which allows for the liner to adhere to the container. When the closure is
removed the pressure sensitive liner remains on the top of the container,
leaving a sealed for your protection seal on the container.
4. PS22 liners are pressure sensitive, coated on polystyrene foam. A PS22 liner
is made of .020” thick polystyrene foam disc with an EVA-wax type adhesive that
is released when the closure is properly torqued onto the container. The liner
is designed to stay in place even after the cap has been removed. These liners
will adhere to both plastic and glass bottles and jars. These liners provide a
one-time seal to be removed by the end user. The benefit of this type of cap is
that no secondary equipment is required to apply them. While these seals when
properly applied can create a moisture barrier for keeping products inside dry,
they are not considered by the FDA to be tamper evident. Suggested Product Uses: dry products,
pharmaceuticals, nutraceuticals, candy, and spices. We offer a line of
Polypropylene caps with these type of liners.
5. PS113 pressure sensitive adhesive coated on polystyrene foam. These liners
come in some of the caps that we offer for our spice jars.
Induction Liner = Heat Induction Seal Liner (SG 75 and others): A liner
with a specialized laminate containing aluminum foil and a plastic heat
sealable film that seals to a container through the use of an heat induction machine. The induction machine produces an
electromagnetic current which adheres the foil lining on to the container which
makes an air tight seal between the liner and the container.
6. SG 75 Heat Induction Liner - An
innerseal which provides a fused, tamper indicating seal on P/E containers. It
is designed for use in plastic closures. It is white lined pulpboard wax-bonded
to an innerseal consisting of .001" aluminum foil with a .002" heat
sealable polyester film. The SG75 liners offers excellent chemical resistance
and superior barrier properties as well as a tough durable seal. It has broad
market acceptance for use with industrial chemicals, automotive products,
pharmaceutical and food products. Typical packaging applications include
innerseals for orange juice, patent drugs, windshield washer solution,
anti-freeze, motor oil, household cleaners, insecticides, herbicides, etc. We offer these liners in the white and black
7. Unlined = No Liner: A closure with no
special sealing features and no liner.
The information contained in this article is for general information purposes only. The information is provided by
United States Plastic Corp. and while we endeavor to keep the information up to date and correct, we make no representations or
warranties of any kind, express or implied, about the completeness, accuracy, reliability, suitability or availability with
respect to the website or the information, products, services, or related graphics contained on the website for any purpose.
Any reliance you place on such information is therefore strictly at your own risk.
In no event will we be liable for any loss or damage including without limitation, indirect or consequential loss
or damage, or any loss or damage whatsoever arising from loss of materials, time or profits arising out of,
or in connection with, the use of this information.