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Introduction:
UV curable Masking
Adhesive Resins, UV Curable
Peelable Coatings, Light Curing
protective Maskants |
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UV_Peelmask is an economical one component, UV cure
masking resin that simplifies your process by
offering fast, reliable protection for your parts.
No measuring or special mixing required.
UV Light curing material UV_PeelMask from General
Chemical offers tremendous benefits to thousand of
companies worldwide to assemble and protect their
parts. Some of this industries are Aerospace,
Appliance, Automotive, Electronics, General
Industrial, Medical Equipment, optical, Telecom and
others. |
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UV_PeelMask |
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The widely used traditional masking products in
today's masking( temporary protection) application
include lacquers, tapes, waxes and reusable boots and
plugs. These masking products are not generally
expensive but masking process itself can
significantly increase cost to product protection
operations. The longer it takes to apply and remove
these traditional masking materials, the higher the
cost of masking processes can be expected. Labor is
major contributing factor to cost other hidden costs
are also associated with using these traditional
surface protection materials. To overcome these
problems, General Chemical Corp. has developed new
UV curable temporary masking products as a solution. |
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| 1. |
Can it be applied
over UV finishes. Yes providing the finishes are
fully cross linked. |
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Product
Specifications – |
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Pot Life – Minimum 6 months providing
product kept in darkness. Our UV
coatings are one package coatings. |
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Viscosity –
40-60 seconds on zaku cup #3 |
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Application in
roll coaters – May be suitable at this
viscosity however we can increase viscosity
if necessary to accommodate. |
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Energy Required for
curing : our laboratory testing is done suing : |
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Wave spectrum – 200 - 400 nanometer
wavelengths
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Power
requirements and line speed – 300 watt
mercury bulb at 25 feet per minute. |
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Cost per square foot - per square foot
based on 5 mil application. |
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Thicknesses that can be applied and the
requirements for cure – 5 mils for optimum
peelability. |
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Chemical Toxicity
(MSDS) – 100% non-volatile |
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Adherence (tack) level to other coatings.
Dependant upon coating or substrate. We
formulate for various applications. |
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Viability in extreme conditions (sub-zero to
120? F conditions with humidity) – No
problem. |
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Supply Availability: local distribution and
volume needs. We manufacture and distribute
directly from our plant in Detroit, MI. We
can accommodate volumes of quart and gallon
trial size, 5 gallon pails, 55 gallon drums. |
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Advantages of UV Curing 100%
reactive solids (no solvent) |
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No decrease in thickness |
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High chemical resistance |
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Rapid cure (processing rate ~ 2 m/s) |
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temperature (T<50?C) |
| Low
energy consumption |
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Reduced process area and equipment |
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Product Applications
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Product Features |
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UV_Mask Resin |
Peelable Grade |
Burn off Grade |
Optically Clear |
Translucent |
Hardcoat |
Elastomeric |
Resists HCL |
| UV_Metal Mask
721 |
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| UV_Metal Mask
730 |
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| UV_Metal Mask
731 |
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| UV_Metal Mask
732 |
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| UV_Metal Mask
733 |
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| UV_Plastic Mask
737 |
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Best Choice |
Will Work |
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 :
UV curable Masking Adhesive Resins, UV Curable
Peelable Coatings, Light Curing
protective Maskants
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The growth in Ultraviolet (UV) curing in the past 20
years has been phenomenal and as a result has become
an established industrial process. UV-curable
masking originated and commercialized in the 1980's,
resulting in millions of dollar cost saving.
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The Principle of UV Curing and Advantages of UV
Curable Peelable Coatings
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In UV curing, a reactive, low viscosity and usually
solvent free coating is applied to the substrate and
made to polymerize by exposure to UV-light. UV
curable Peelable coatings are one component systems
which typically consist of: acrylate oligomers,
acrylic monomers, reactive diluents, photoinitators,
additives and modifiers. The main types of acrylate
oligomers used are: epoxy acrylates, polyester
acrylates and polyurethane acrylates. These
oligomers provide the characteristic basic
properties to the resulting coating. Photo
initiators
are a very important component of the coating
composition. The role of the photo initiator is to
begin the free radical polymerization (curing)
process when the coating composition is exposed to
the proper irradiance UV light from a medium
pressure Mercury lamp (primarily UVA & some UVC
wavelengths; 315-400 nm and 200-280 nm). Various
additives can be used to enhance coating properties
such as wetting, surface leveling, flow rate, color
etc. Modifiers can increase durability (impact &
crack resistance) of the UV Peelable coatings. |
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Through careful raw material selection, UV cure
coatings formulators can more easily manipulate
physical properties, such as chemical and weather
resistance as well as mechanical properties, such as
tensile strength and elongation. Controlling these
properties enables the formulator to create
customized Peelable coatings that meet specific
performance criteria for each application. In
addition to performance benefits, UV- curable
Peelable coatings provide processing advantages over
traditional solvent borne and water based
technologies. First because these UV curable
coatings contain no solvents, volatile organic
compound (VOC) emissions are in compliance with EPA
regulations. UV curable, Peelable coatings also cure
much faster than solvent borne/water borne
counterparts because there is no solvent or water to
remove; these are 100% reactive systems. In fact the
curing only takes a few seconds, making UV curable
coatings a particularly economic method by; speeding
production masking times, reducing labor costs and
increasing profitability. The properties of UV cured
Peelable coatings are far superior to those of other
systems. The UV curing mechanism involves free
radical polymerization. Di-functional and poly
functional compounds in the formulation crosslink
into tough, durable cured films. Advantages of UV
curable masking coatings over conventional masking
products can be summarized in the following chart of
advantages: |
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| Superior Film
Properties (thermosetting, mechanical, chemical) |
| Good Cost/
Performance |
| Much Faster Cure
(take seconds to cure) |
| Significantly shorter
application (masking) time and significantly
increased production cycles |
| Worker and
environmentally friendly- no solvents and little
to no VOC emission. |
| Minimal Capital
Investment |
| Space saving
installations |
| Dispensing can be
automated |
| Coating may be
applied by dipping, spraying, screen printing or
pad printing |
| Little heat applied
to substrate |
| Curing is not
dependant on temperature/humidity condition of
environment |
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Application:
How Do UV_PeelMask Work? |
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The UV light curing process begins when the photo
initiator in the mask is exposed to a UV light
energy source of the proper spectral output. Its
molecules split into free radicals (initiation).
Which then begins to form polymer chains with
ingredients (Also known as propagation). This
continues until all of the ingredients have formed a
solid polymer (termination). What was once a liquid,
is now a solid Peelalbe resin film.
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All of the components in the UV curable system react
and form the polymer coating network. Therefore 100
percent of the applied coating remains on the
substrate once the coating is cured. No VOCs are
emitted after cure and the coating is termed
environmentally friendly.
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| Patch
Test: |
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Because it is difficult to determine the type and
condition of the surface, perform a small patch test
first. It will determine the peel ability of the
coating on your particular surface, it will define
the coverage and the approximate amount of time
required for it to work and to remove off of
surface. We offer no implied or other wise a
warranty for our products. |
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UV_PeelMask masking resins are a line of light
curable temporary protection used in surface
preparation and finishing operations where a barrier
is needed to protect surfaces and cavities. These
masking resins offer reliable protection during the
following processes. UV_PeelMask is far superior to
traditional masking process. We will custom engineer
a solution to meet your process requirements. |
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Process/Industry |
UV_PeelMask Features |
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Acid Stripping |
731,732,733 |
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Airflow Testing |
730 |
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Anodizing |
721 |
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Chemical Milling |
721 |
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General Masking |
721,730,737 |
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Grit Blasting |
721,737 |
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Machining |
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Painting & Powder Coating |
737 |
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Shot Preening |
721,737 |
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Vibrato Finishing |
730 |
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Curing: |
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COMPONENTS OF UV CURING SYSTEMS
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UV light is part of the electro-magnetic spectrum
and is generally between 200 and 400 nanometer
wavelengths. The ultraviolet lamp bulb is the source
of UV light and it is a very important component of
UV curing system. The role of UV light with
sufficient energy is to initiate a polymerization of
photo reactive components (oligomers and monomers)
of coating in presence of photo initiator.
Industrial UV lamps produce energy across the full
spectral range of the optical region. Several types
of UV light bulbs with output intensities as high as
120 watts/centimeter (600 watts/ inch) are
available. Type and intensity if the UV bulbs,
component configuration, production capacity, the
mature of the processes and the shape of the
substrates and costs are major factors which play
role in selection of appropriate UV curing system.
All reputable suppliers of ultraviolet light radiant
energy equipment rely on some basic components such
as:
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| The light source
(typically a tubular glass bulb) medium pressure
Mercury lamp |
| A power supply to
energize the bulb |
| Shutter system to
prevent light from hitting a target |
| Cooling system to
remove heat from the lamp area |
| Reflector systems to
focus or diffuse the light |
| Safety shielding to
prevent UV-light being emitted into the
workplace and protect operators |
| System to transport a
coated parts- a conveyor system |
All well designed UV light sources are
houses in units which prevent UV light from
reaching the workplace and preventing
possible problems of eye exposure to the UV
light. |
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Removal: |
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UV_PeelMask masking resins are available in
burn-off, peelable, and water soluble grades. The
resins are easily removed and leave the surface
residue free. Probably most widely used UV cured
protective coating is Peelable type coating.
UV curing which cure in a few seconds provide
durable and cross-linked films with sufficient
adhesion for surface protection objects during
handling, storage, transportation, and in
manufacturing operations such as machining, acid
stripping, solvent cleaning etc. UV curable Peelable
coatings are easily removed manually or help of non
abrasive tool. Typically removal of coatings
starters by lifting up of edge and than peeling of
complete coating in one piece rather than in
fragments. The peeled coating is basically cross
linked plastic and non hazardous film which can be
disposed of according to local regulations for waste
plastic materials.
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Coverage
: UV cure
peelable coatings are applied at between 5mils
to 15 mils. More common would be between 5 mils
and 10 mils. At 5 mils the coverage area is
12,200 square inch/ liter (84.7 square
ft./liter) or 46,177 square inches/gallon (320.6
square ft./gallon). At 10 mils the coverage area
is 6,100 square inches/liter ( 42.4 square
ft./liter) or 23,088.5 square inches/gallon
(160.5 square ft./gallon).
ESTIMATING USAGE :
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Thickness of the Bond Line Gap
or Coating |
Theoretical Area Covered by
1 Liter of Coating |
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0.002" (51 μm) |
30,500 in2 (212 ft2)
(19.7 m2) |
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0.005" (127 μm) |
12,200 in2 (84.7 ft2)
(7.88 m2) |
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0.010" (254 μm) |
6,100 in2 (42.4 ft2)
(3.94 m2) |
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0.015" (381 μm) |
4,070 in2 (28.3 ft2)
(2.63 m2) |
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Storage: |
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It is recommended that temperatures of 13 degrees C
- 32 degrees C (55 degrees F- 90 degrees F) should
be used within one year of purchase. should be
stored in the original shipping container in indoor
environment. Containers should be sealed until
needed. Protection from freezing is necessary.
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 Good
Day, I have an application which requires accurately
painting stripes around the inside of a glass cup
that is a little bigger than a shot glass. Suppose I
was to apply one of your UV curable masking products
to the inside of the cup, place the cup into an
opaque "stencil" shutter, then expose it to UV.
Would the shaded areas remain uncured? If so, could
the uncured product be "washed" away, leaving the
cured areas as a paint mask?
2. We are situated in the Netherlands and
Germany and specialized in hanging equipments and
masking solutions for all types off surface
treatments (powder coating, anodizing, etc. etc.)
There is a customer who asked for solvent-free ,
temporary Mask in there process of anodizing,
chromating, opalizing.
They did test the last years several liquid masks,
strippable after the process, but not solvent free.
May be your company can help us with a product that
is in your program?3.We are looking for temp
protecting coatings during chemical milling process.
Your product seems to be from interest
UV_MetalMask_721. Can you provide us with further
information. Main target is milling Aluminum
sheets |
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UV curable Masking Adhesive Resins, UV Curable
Peelable Coatings, Light Curing protective Maskants |
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