Roller application

Brush application is very desirable for inhibitive primers applied directly to steel and for toxic materials. Roller application is not recommended for structural steel surfaces. 

Roller coating Raised surfaces can be painted without masking. Special effects like stripes. Roller applicator, either manual or automatic. Special paint feed system required for automatic work. Dryers... 

In very large volumes a roller application of a melted coating is used. This technology is closely related to the calendering of film and their lamination onto a textile carrier, as described in Section 14.4.4 in the discussions on calendering and laminating. 

In the 1950s, painters started using rollers to apply paint more rapidly than by brush or spray. It is often stated that roller application provides more uniform coats and smoother finish. While rollers are excellent for smoothing a finished coat, and may be satisfactory for application on a very smooth substrate such as steel sheet, they are not as satisfactory for application to rough surfaces such as concrete where the scrubbing action of a brush may better fill the irreg-... 

Figure 11.9. Various glue spreaders (Sellers, 1985). (a) Roller applicator, (b) Curtain coater. (c) Foam extrusion with in-line roll prepress.

Roller application Fast and easy to master High paint yield Uniform film thicknesses only suitable for smooth surfaces worse wetting of the substrate labor-intensive steel superstructures handicrafts do-it-yourself... 

Roller applicator, either manual or automatic Special paint feed system required for automatic work. Dryers. 

Features Solv.-free inc. hiding power, wash and scrub resist. splash reduction during roller applic. no neg. effects in gloss high UV stability Properties Clear to si. yish. cloudy liq. dens. 1.02-1.04 g/cm (20 C) ... 

Features Qil-free replaces epoxy resins in phenol-epoxy systems very good leveling at roller applic. high detormability color-stable Reguiatory FDA 21 CFR 175.300... 

PROC 10 Roller application or brushing low-energy spreading of, for example, coatings... 

Structured paint n. Paint having a gel-like consistency which breaks down under the kind of shear exerted during brushing or roller application and re-forms when the shearing force is removed. When there is a time lag between the removal of the shearing force and the start of gel re-formation, the paint is said to be thixotropic. The thixotropic structure can vary from a very light gel to the fully gelled thixotropic paints of the non-drip type. 

Ready for reverse roller application at 90% solids. Stove 30-60 s to a peak metal temperature of c. 200 °C Or to application viscosity. 

Neoprene solvent solutions are prepared by dissolving neoprene in standard rubber solvents. These solutions can be formulated in a range of viscosities suitable for brush, spray, or roller application. Areas of application include linings for storage tanks, industrial equipment, and chemical processing equipment. 

Vinyl ether monomers, like DVE-3, proved to be very effective reactive diluents in UV-curable epoxy-based resins, not only to lower the formulation viscosity and make it suitable for spray or roller applications, but also to achieve a faster and more complete curing, as VE and epoxy monomers were shown to undergo copolymerisation by a cation-driven mechanism [50]. Moreover, the addition of vinyl ether may impart some flexibility to the UV-cured epoxide, thus improving its adhesion on flexible substrates. 

A two component, PUR laminating adhesive system for panel construction, for extrusion or roller application, offering little or no foaming tendency and a very high elongation to break. 

A range of isophthalic/NPG gelcoats formulated to offer water and certain chemical resistance, developed for marine and sanitary use but finding application wherever high performance is required. Can be applied by both airless and conventional spray equipment, but brush or roller application is not recommended. Available in a range of standard and custom colours. 943-W-016 is the standard white ISO/NPG gelcoat. 

An unaccelerated, non-thixotropic, isophthalic resin for brush or roller application, offering excellent water and heat resistance. DTD approved and also by Lloyd s Registry. Specially designed for the manufacture of large stmctures and also for structures operating under tropical conditions. 

Patterned glass is made by applying texture to one or both glass surfaces by suitably embossed rollers. Applications include shower doors, furniture tops, room dividers, and windows. There is even an application for roller-applied Fourcault-type sheet texture for use in restorations of nineteenth century homes. 

Alternatively, some coating systems are characterized by the application method used. For example, for coil-coated metal sheet (commonly steel or galvanized steel), very specialized high-speed roller application equipment is used to coat the sheet steel as it is unwound from a coil. The paint used in the coil-coating process can be of virtually any generic type, although alkyds, polyesters, epoxies, and zinc-rich epoxy coatings are the most prevalent. 

Secure a fast drying time - not more than 5 min for spray application and 20-30 min for brush or roller applications. 

To create a film with a defined (dry film) thickness of up to about 200 jim, the dispersion is usually cast on to the substrate using either a drawdown film applicator or a roller applicator. Suitable substrates are glass, polyethylene, polyethylene tereph-thalate or teflon. Films with thicknesses in the millimeter range, such as are used for mechanical strength testing, can be formed by pouring the dispersion into flexible polyethylene or silicone rubber trays, which facilitate the removal of the film after drying. 

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