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WoodPeel_4820UV-uv curable Temporary protective Peelable coating UV curable, Water Resistant ,Heat Resistant, Alkali resistant, Strippable Coatings and Protective Peelable coatings For Wood Finishing Industry |
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WoodPeel 4820UV |
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For Paint Protection Film such as Temporary Protection for Wood Finishing Industry |
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Shedding Some light On UV Curable Peelable coatings for Temporary Protection |
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Today a number of masking technologies are commercially available for temporary of various products in automotive, construction, appliance, printing, packaging and other industries. Wood, Metal Sheets, baked topcoat, screen printing products, lithography and many others are typical materials when need protection from scratching, chipping, solvents, weather damage, storage, transportation, machining drilling, acid stripping, plating and etc. These |
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The widely used traditional masking products in today's masking( temporary protection) application include laguers, 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 backdraws, General Chemical Corp. has developed new UV curable temporary masking products as a solution. |
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UV CURABLE PEELABLE COATINGS |
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The growth in Ultraviolet (UV) curing in the past 10 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 material is applied to the substrate and then made to polymerize by exposure to UV-light. UV curable Peelable coatings are one component systems which typically consist of: oligometric acrylates, acrylic monomers, reactive diluents, photoinitator, additives and modifiers. The main types of acrylic oligomer used are: epoxy acrylates, polyester acrylates and polyurethane acrylates. These oligomer provide basic properties to the resulting coating. Photoinitiators are very important component of coating composition. The role of photoinitiator is to begin the polymerization (curing) process when coating composition is exposed to UV light with certain energy (wavelength.) 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 formulator to create customized Peelable coatings that meet specific performance criteria for each applications. In addition to performance benefits, UV- curable Peelable coatings provides 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( air dry) much faster than solvent borne/water borne counterparts. In fact the curing only takes a few seconds, makes UV curable coatings a particularly economic by speeding production masking times and increase profitability. The properties of UV cured Peelable coatings are far superior to those of other systems. The UV curing mechanism involves chemical reactions of polymerization. Di-functional and poly functional compounds in formulation cross linking of cured films. Advantages of UV curable masking coatings over conventional making products can be summarized in the following chart of advantages:
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Superior Film Properties (thermosetting, mechanical, chemical) |
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Good Cost/ Performance. |
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Much Faster Cure (take seconds to cure) |
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Significantly shorter application (masking) time and significantly increased production cycles
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Worker and environmentally friendly- no solvents and little to no VOC emition. |
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Minimal Capital Investment |
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Space saving installations |
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Dispensing can be automated |
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Coating may be applied by dipping, spraying, screen printing or pad printing
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Little heat applied to substrate
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Curing is not dependant on temperature/humidity condition of environment |
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How Do WoodPeel 4820UV 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 environmetnally 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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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) |
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A power supply to energize the bulb |
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Shutter system to prevent light from hitting a target |
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Cooling system to remove heat from the lamp area |
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Reflector systems to focus or diffuse the light |
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Safety shielding to prevent UV-light being emitted into the workplace and protect operators |
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System to transport a coated parts- a conveyor system |
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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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Advantages of UV Curing 100% reactive solids (no solvent) |
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| 100% reactive solids (no solvent) |
| No decrease in thickness |
| High chemical resistance |
| Rapid cure (processing rate ~ 2 m/s) |
| Low temperature (T<50°C) |
| Low energy consumption |
| Reduced process area and equipment |
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Removal: |
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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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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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Physical Characteristics: |
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Color: Clear
Weight: 8.5 lbs/gallon
Viscosity: sprayable
Flashpoint: None
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