06.12.2014
Architectural coatings include paints, sealers, and specialty coatings for building and construction applications (e.g. Most coatings are applied to surfaces using sprayers, rollers, brushes and other applicators. Cross-linking, by definition, is the process by which polymers react to form long chains in a "linked" network. Thermoplastic coatings are powder coatings which do not undergo any additional reactions during the fusion bonding process, but only melt and solidify out into the final form.
Thermoset coatings are powder coatings that incorporate a cross-linker into the formulation. Radiation-cured coatings incorporate reactive liquid vehicles which are crosslinked by high-intensity ultraviolet (UV) or electron beam (EB) radiation. Coatings can be classified into a number of categories based on their composition and function.
Ceramics - coatings consisting of oxides, carbides, nitrides, carbon, and other non-metals with high melting points.
Inks - liquids, powders, or transfer tapes that are printed, sprayed, rolled, or transferred onto substrates or media for printing, marking, and creating graphics and patterns.
Lacquers - coatings made from the clear sap of the lacquer tree (rhus verniciflura) that produce a hard, durable finish to decorate and protect wood, metal, and other surfaces. Selection Tip: With the advent of aqueous acrylics, many differences between traditional paints have merged. Stains - semitransparent or semisolid coatings used to accent wood grains and add protection. Varnishes - transparent, hard, protective finish consisting typically of a drying oil, resin, and thinner or solvent. The vehicle or solvent is the liquid part of the coating in which the body and binder are dissolved. May be more difficult to apply due to greater "drag", but goes on heavier for better one-coat hiding and coverge.
Vegetable-oil base can provide nutrients for mildew growth; most products contain biocides to minimize growth. Less likely to grow mildew; biocide additives further discourage growth and help maintain fresh appearance. Can be used on most materials, but for new concrete, stucco, and other masonry, a sealer or pre-treatment is required; should not be applied directly to galvanized metal. Can be used on wood, concrete, stucco, brick, galvanized metal, vinyl siding, aluminum siding, etc. For more information on the properties of coating resins and substances, visit the Industrial Coatings Selection Guide on GlobalSpec. There are a number of specifications that describe the performance of architectural coatings.
Coverage - the theoretical area of a substrate that a coating can cover at a given thickness.
Operating temperature - the temperature or temperature range that a coating can be used at or exposed to without degrading structural or other required end-use properties. Resistivity - a measurement of the coating's ability to resist the flow of electrical current. Dielectric strength- the maximum voltage that a dielectric material can withstand under specified rupturing. Often coatings are classified and selected based on the specific features and characteristics they exhibit. Chemical resistant -  coatings which resist acids, alkalis, oils, and general chemicals. Corrosion inhibiting - coatings which prevent moisture from reaching the metal or underlying substrate, or provide a sacrificial layer.
Heat resistant - coatings resist damage from heat, or are formulated for use in high-temperature environments.
Touch-up - coatings are used to repair and match the original coating where it has been damaged by scratching, corrosion, abrasion, erosion, scuffing, denting, chipping, delaminating, or other processes. Selection Tip: The touch-up coating material should have good adhesion to damaged and prepped substrate and undamaged paint surfaces. Weather resistant - coatings are weather-resistant or protect against damage from UV radiation. In order to work effectively, the coating must be compatible with the surface it is being applied to.


Temperature sensitivity - surfaces like wood and plastic may not allow for certain application processes such as powder coating which require high temperatures to cure the material to the substrate.
Contamination - surfaces must typically be clean of all surface contaminants, oil, grease, and oxides to prevent impairment of the coating's adhesion to the substrate. Cartridge - ink, coating, or marking material is packaged in a cartridge for controlled delivery via a printer or other type of precision dispensing equipment. Marker - coating, ink, paint, or marking material is packaged and dispensed as a marker or pen. Transfer Tape - ink, coating, or marking material is packaged as transfer tape for controlled delivery as an alternative to direct coating. For many years, UV-cured coatings (which cure when exposed to ultraviolet light) have been proven to be durable, reliable and long-lasting in factory settings. Portable UV curing equipment is largely divided into two categories based on the physical size of the machine. Both types of equipment have a rectangular-shaped curing window that is directly under a UV lamp. Hand-held machines generally range in power from 250 watts to 1,800 watts with an effective curing width of up to 12 inches. It is essential for the operator of UV curing equipment to be trained in proper operating and safety procedures and for all personnel in the area while equipment is in use to be equipped with proper safety equipment. Some hand-held equipment manufacturers include proximity sensors in their hand-helds to reduce unwanted exposure by disabling the light source when the machine is not close to a surface. UV curing shows much promise for eliminating many of the problems and shortcomings that come with more conventional coatings, such as VOC emissions that keep people out of an area for a period of time after the coating is applied, long cure times, and wait times between recoat applications. Usually, equipment manufacturers and coating formulators offer training on safety and application techniques. Daniel Dayon is an engineer for HID Ultraviolet LLC, a New Jersey-based manufacturer of ultraviolet curing equipment. Tasman Industries main focus is the supply and installation of sprayed polyurethane foam insulation and related coatings to the industrial sector.
Some other industrial jobs we have done include pipe fills (filling between pipes run in a larger carrier pipe) and ditch plugs for pipelines running down slopes or banks. We also provide other types of industrial insulation for specialty jobs including semi rigid fiberglass insulation, mineral wool insulation, rock wool insulation, calcium silicate insulation, and assorted piping insulation and cladding. After application to the substrate, the solvent evaporates and leaves behind a purely solid coating. Technologies which use fusion bonding include thermoplastic coatings, thermoset coatings, and moisture-cured coatings. Polyurethane reactives (PUR), certain silicones, and cyanoacrylates are examples of materials which react with moisture or water to cure the coating. During the cure cycle (melting) it reacts with other chemical groups to develop and improve its performance properties. In modern product terminology, lacquer-based finishes are known as shellac, and lacquer itself refers to other polymers dissolved in VOCs. Aqueous acrylic lacquers are becoming a popular choice, combining properties of lacquers and enamels.
They are designed to provide adequate adhesion between the surface and subsequent topcoats of other coatings.
Semitransparent stains penetrate the wood without forming a film, allowing much of the wood grain to show through the finish. They are applied as liquids to wood or other materials to provide a colorless coating that protects from abrasion, chemical attack, water damage, and in some cases UV light. In addition to performance, a coating's chemical makeup determines its compatibility with the substrate (surface), with the surrounding environment, and to any corresponding codes or regulations.
It is also responsible for making the film harder and more abrasion resistant and reducing shrinkage cracks during drying. It imparts adhesion, binds the pigments together, and influences properties like gloss potential, durability, flexibility, and toughness. It carries the film forming parts of the coating and adjusts its viscosity and flow characteristics. It is usually expressed as volts per unit thickness and is also called disruptive gradient or electric strength. Each layer in the stack has an optical thickness of a quarter-wave at the design wavelength. The color and functional protective properties should match those of the existing paint or coating on the substrate.


Rough surfaces may require more coating than smooth surfaces for sufficient coverage due to the increased surface area. Floor models are larger, heavier, equipped with wheels and designed to be rolled over the surface to be cured. The size of this window determines how much surface can be cured with each pass of the equipment. These are used extensively when refinishing countertops, bathtubs, sinks, and so on, and they are also an essential part of the floor-coating toolbox for curing areas under stationary equipment, corners and stair treads.
Floor-curing equipment often contains safety-tilt sensors to disable the light source when the machine is tilted back to eliminate stray UV light. Also, UV coatings can be considered a truly green technology due to their lack of emissions and the potential for immediately putting the coated surface back into use. We have provided spray foam insulation to the oil & gas industry, mining and forestry for both thermal and acoustical insulation and also for containment or protection. These include multi-component coatings, moisture-cured coating, and radiation-cured coatings. Limitations on the use of organic solvents have made water the predominant carrier solvent for coalescent coating technologies. They also have lower levels of volatile organic compounds (VOCs) and are more environmentally-friendly.
These coatings are dry, meaning they don't require a solvent to keep the components together. Visit the Sealers and Seal Coatings product area on GlobalSpec for more information on sealers. Semisolid stains act more like paints, forming a protective film and not deeply penetrating the wood. Binders include synthetic or natural resins such as acrylics, urethanes, polyurethanes, fluoropolymers, polyesters, melamine resins, epoxies, silicones, or oils. Erosion is surface damage or material removal caused by the impact of particles or slurries. Some coatings may even require roughening or smoothing of the surface before they can be applied effectively. Automobiles, airplanes, prefinished hardwood floors, furniture, cabinets, business cards, musical instruments, coated pipe, appliances and many more products are all coated with UV-curable coatings.
Some of these machines feature a speed indicator, letting the operator know exactly how fast the machine is being pushed forward. Iron and gallium are commonly used in other industries, but the standard for site-applied coating machinery is mercury. We also provide all types of coatings including single component elastomeric coatings for topcoat of foam to provide UV resistance, urethane and poly-urea plural component coatings and silicone coatings. Abandoned pump stations and other projects have also been filled with lightweight polyurethane foam to block access and keep water from filling the space and causing the structure to settle.
It is used commonly in many spray paints and lacquers, but is highly regulated and limited due to the high levels of solvent released into the atmosphere. For more information, visit the Primers and Adhesion Promotors product area on GlobalSpec. The properties of the pigment, preservative, water repellant, and resin in the stain determine its durability and performance. The speed with which the UV equipment can pass over the surface is determined by the coating type, the amount of pigment in the coating, the thickness of the coating and the power output of the UV light source.
This can be important for ensuring that the coating is cured to the manufacturer's specifications - otherwise, there is a risk of premature failure of the coating, as well as of an incompletely cured surface that will be marred by foot traffic.
The core gas of the lamp is made up of argon or xenon, a difference that mainly impacts the start-up time of the machine. Because of this, the evaporation method is often used in conjunction with cross-linking - inhibitors which prevent premature curing evaporate with the solvent and allow cross-linking to occur. Parts are heated before or after application to fuse the particles together and bind them to the surface.
Most manufacturers that use argon lamps build in some form of mechanical shutter or holster to block the UV light during the warm-up period.
Most machines that require a warm-up period also require a cool-down period before the UV lamp can be turned on again.




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