Frequently Asked Questions
Vented Closures - Questions
Vented Closures - Answers
Can we continue to use our current closure, or am I required to use
one from PSI?
PSI has the capability of converting almost any closure to a vented format. However,
we do not manufacture or mold caps; we purchase unlined closures from a number of
manufacturers and convert them to a vented format at our facility. If your closure
manufacturer can make arrangements to ship your UNLINED closures to PSI, it is likely
that we can install our Circumvent and/or AirFoil vented liners into them.
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Do we send our caps to PSI to have them converted to a vented format,
or can we buy the complete vented cap from PSI?
Our customers use either method. Some send us unlined caps that they have purchased,
however, most of our customers simply buy the complete cap/liner directly from PSI.
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I noticed that the samples we received have a hole in the cap. Is
it possible to have a vented cap without a hole in it?
Yes. Although venting your container with a cap that has a hole in it is the most
fail-safe way to vent your container, Circumvent is also available in a format that
does not require a hole be placed in the cap. Many of our customers do not wish
to have a hole in their cap for a variety of reasons (mostly due to aesthetic concerns).
In these cases, we offer a grooved-backed version of Circumvent. This version allows
gases into or out of the container by channeling them around the threads of the
closure via grooves in the liner. These grooves remain
open even though the cap liner is providing a secure seal for the container. Both
versions provide a reliable, non-leaking vented closure.
View a demonstration of the venting process
with and without a hole in the cap.
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Can we buy just the Circumvent or AirFoil liner from PSI?
Yes. Our vented liner materials are available to closure manufacturers or users
in a variety of strip-widths, thicknesses, and multiple head configurations.
Contact us to discuss the details!
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Does PSI offer a vented heat-induction foil?
Yes! AirFoil is the only true vented heat-induction foil liner in the world that
is designed to eliminate the risk of leakage! Typically used in conjunction with
our Circumvent foam liner as a “back-up” liner, a layer of AirFoil is
the perfect solution for those clients that require tamper evidence or the added
protection of an induction sealed container, yet still need to vent the container!
AirFoil is available in either a clean-peel or weld-seal format for HDPE, PET, PVC
and other container materials.
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Will Circumvent and/or AirFoil work with my formulation?
Based on the broad chemical compatibility of our Circumvent and AirFoil liners,
it is likely that we can solve your container swelling or collapsing problems regardless
of the contents of your package. However, it is ultimately every client's responsibility
to properly test the materials for compatibility and function. Samples are available
for testing.
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What closure sizes and styles
are available?
The list is virtually endless. We have the capability of converting closures of
varying heights and diameters from 13mm - 110mm to a vented format! We can work
with standard screw closures, child-resistant closures, and many specialty or dispensing
closures. Some closures are linerless and can be converted as well. We even do specials!
Contact us to discuss your needs. The more we know about your application, the more
we can help.
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What does the term “hydrophobic” mean?
A hydrophobic media, membrane or material is designed to allow air to pass through
it, but stop the passage of liquids. Circumvent and AirFoil utilize a special hydrophobic
material to allow air to pass into or out of the container while preventing liquids
from leaking out.
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Can air go in or out of my container if I use Circumvent or AirFoil?
Yes! Circumvent and AirFoil utilize a “bi-directional” venting material
that allows air to pass in either direction depending upon the conditions. Whether
pressure builds-up within the container or a vacuum is formed, Circumvent or AirFoil
will prevent the package from swelling or collapsing. Circumvent and AirFoil act
as a sterile barrier.
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