are the benefits of Barrier Treatment
of Fluoro-Seal Fluorination
sizes of parts and containers treated
styles and shapes treated
Inside & Outside
walls treated (all exposed surfaces)
Fluorination results, Consistent Treatment
to Any Fabrication process including injection,
injection blow, stretch blow, roto-molding and
or Welded Assemblies
Day Lead Times
locations in USA and Overseas
Operation Available for Large Volume Customers
problems does the Barrier Treatment address?
Fluoro-Seal Process virtually eliminates or reduces
a variety of problems normally associated with the
chemical attack of polyolefins including:
fragrance and/or active ingredient loss
of the container with the product
can reduce chemical permeation
for many products up to 1000 times!
size or shape container, part or film made of polyolefin plastic
from very tiny to 10,000 gallon tanks. In addition
to HDPE, LDPE, PP, and UHMW-PE, Fluoro-Seal
can fluorinate a variety of other materials (including thermoplastics,
rubber and other elastomers and some nonmetallic
and metallic solids) to modify their chemical permeation
resistance or surface characteristics.
fluorination level should I use?
level of fluorination that you use is dependent on
so many factors it is impossible for us to know how
your container will perform with your product. Product
formulation, container size and style, resin and
additives are some of the factors that impact on
the final results. For this reason, Fluoro-Seal always
testing be done with the actual product and
exact container and closure system proposed to determine
the total package that will meet your requirements.
FSI feels this container qualification process is
so vital that we are happy to treat a reasonable
number of containers at various levels for testing
is fluorination performed?
to be treated are put into a sealed reactor and exposed
to a measured amount of elemental fluorine gas under
specifically controlled conditions. Having very specific
parameters for treatment enables us to reproduce
our various levels and treatment options with great
accuracy and control.
you give me a more technical picture of what
fluorination termagant does?
is chemically bonded to the chain-like molecules
on the outermost surfaces of the plastic. The reaction
is permanent and forms a thin fluorocarbon polymer
surface layer with heightened chemical stability.
Once grafted in place, the fluorine is permanent
and not readily removable, nor does it become unbound
with time. This layer
imparts outstanding hydrocarbon solvent barrier
and consequently has found growing uses in packaging
and other industries.
barrier greatly reduces the permeation and scalping
of a range of fuels, chemicals, solvents, flavors
and fragrances. Container softening and/or swelling
can be reduced in many cases and long term paneling
through weight loss of product can often be brought
down to an acceptable level. Fluorination effectively
extends the application bounds of polyethylene containers
and tankage. This allows inexpensive polyethylene
to be used in applications with aggressive chemicals,
such as with agricultural chemicals, solvents, institutional/industrial
cleaning formulations, food, pharmaceuticals and
cosmetics where an untreated container would have
marginal success in containing the product.
long will the treatment last?
fluorination treatment is a permanent molecular
bonding of fluorine atoms on the exposed surfaces
of the polyolefin substrate.
all fluorination processes for rigid polyethylene
packaging and tankage, fluorine is chemically bonded
to the chain-like molecules on the outermost surfaces
of the container. The reaction is permanent and forms
a thin fluorocarbon polymer surface layer with heightened
chemical stability. Once grafted in place, the fluorine
is permanent and not readily removable, nor does
it become unbound with time.
surface abrasion and rare cases of extreme reactive
agents, the barrier performance resulting from the
fluorination treatment lasts the life of the container,
even in multi-trip packaging such as oil drums and
IBC's. Fluorinated automobile gasoline tanks have
been extensively tested and shown to deliver exceptional
barrier performance in excess of the ten year minimum
can I tell if a container has been fluorinated?
containers are much more water wettable than non-fluorinated.
This can be detected by observing water beads or
spread of dyne test fluids. Generally it is best
to perform any test on the inside surface
of the container as wettability and dyne tests cannot
readily discriminate between fluorination and flame
treatment or corona/arc tunnel surface treatments.
containers generally have a detectable loss of subtle
indicators, FTIR testing with a surface reflectance
sampling accessory (e.g. Harrick, Pike or ASI) to
qualify fluorine IR absorbance bands is the most
effective method for determining if a container has
is a dyne level test?
level is a measurement of the surface energy of a
substrate. Both (PP) and (PE) are low energy plastics.
Untreated PP and PE have a low dyne reading (usually
30 to 32 dyne). Using Fluoro-Seal surface modification
treatment will raise the surface energy level and
allow adhesives to achieve maximum surface adhesion.
are the dyne levels of surface modified
fluorination treatment substantially increases the
dyne level of HDPE plastics. In most cases the dyne
level observed after surface modified fluorination
exceeds that of flame or corona surface treatment.
The actual dyne levels range from 55 to over 80 dynes/sq.
is the Fluoro-Seal Permeation Barrier Process?
Fluoro-Seal Process is a post-manufacture, computer
controlled fluorination treatment, whereby plastics
and other materials are introduced to elemental fluorine
in a strictly-controlled environment under specific
conditions of temperature, pressure and time. This
environmentally safe application is a custom process
with strict quality controls.
polyolefin resins fluorinate the best?
HDPE resin with low amounts of additives fluorinate
best. This means they give good chemical barrier
and do not exhibit a tendency toward yellowing.
pigmented products be fluorinated?
has successfully fluorinated every color imaginable,
including some pearlescent pigments. With some colors,
there may be slight bleaching, so testing is recommended.
The most common color for fluorinated bottles is
barrier is always obtained with natural unpigmented
resin. Challenging packaging applications have may
choose a dual layer bottle with a natural inside
layer and trade dress color
outer layer. This allows higher barrier result than would have been possible
with a monolayer pigmented bottle.
pigmented bottles will prove satisfactory most of
the time. However, the treatment level may have to
be higher to match barrier performance of unpigmented
strongly recommend chemical
compatibility testing. Testing serves as
your principle guide to satisfactory performance.
causes paneling? Can Fluoro-Seal help eliminate
is a direct result of a reduction in volume of the
contents of a container. The contents being either
the liquid, the headspace gas or both. The absorption
of solvent into the container walls where it plasticizes
the polymer (HDPE) may further aggravate the paneling
in volume of liquids is due to absorption and permeation.
Plasticisation is due to absorption. Fluorination
can reduce or eliminate these factors.
in the volume of headspace gasses is due to absorption
of the gas into the liquid or removal of oxygen through
oxidation of the contents. Fluorination can not eliminate
this problem, but its effect may be greatly reduced
through control of the first two factors.
are the numbers for permeation rates before
and after fluorination?
does exist for weight loss of pure solvents in fluorinated
containers and for many there is a substantial reduction
of product loss achieved by fluorination. However,
FSI does not advise utilizing this data for package
product formulations are a complex mixture of ingredients.
Some ingredients may permeate; some others may not.
A permeate may be important to efficacy, or may
be an inert filler, extender or carrier.
rates are significantly altered by the presence of
an example from the auto industry is that permeation
of petroleum fuel through plastic gasoline tanks
is increased by the presence of alcohols in the fuel.
Trace quantities of fuel injector cleaner in the
fuel mix also impact actual fuel permeation rates.
it is unreliable to use permeation data for single
solvents to predict permeation of complex mixtures.
The only valid approach is to perform tests with
the actual formulation in each container application.(See
also Samples, and Testing