Coating application methods brushing

Another method entails application of the coating by spraying, brushing... 

The properties of a typical Chevron sulfur composite are shown in Table I. One desirable feature is the low melt viscosity in the 250°-300°F range. This provides considerable latitude in the choice of application methods. Spray has proven to be effective for many uses. Brush, roller, and dipping have also been used for some coating applications. Most composites can be put into service immediately after application because they attain most of their strength and durability shortly after they solidify from the melt. 

The most common methods of paint applications are brush and roller, air or airless spray, roll coating, electrostatic spraying, electro deposition, and dip coating. Many factors affect the choice of method to be used for a particular application. These include film thickness, appearance requirements, and operating cost. 

Latex adhesives replace solvent-based adhesives more easily than solution adhesives. Most latex adhesives are produced from polymers that were not designed for use as adhesives. This is why they require extensive formulation in order to obtain the proper appUcation and performance properties. Application methods for latex adhesives include brush, spray, roll coat, curtain coat, flow, and knife coat. The bonding techniques used for latex adhesives are similar to those used for solvent adhesives. The following techniques are popular ... 

Since no reinforcement is used with the gel coat, the thixotropy has to be sufficient to prevent sagging on vertical mould surfaces. Base viscosity also has to be adjusted to the application method. Gel coats available today can be sprayed, but many are still required to be applied by brush. For spraying, an increased styrene content is used, which besides reducing viscosity compensates for evaporation during the spraying process. 

Primer and adhesive application are generally accomplished by spraying, brushing, tumbling or dipping. Each different application method has its own strengths and weaknesses. The choice of the application method is dependent on the size and shape of the parts, the number of parts to be coated, and whether the part is to be wholly or only partially coated. 

Trade Sales Paints Coatings applied on-site at ambient conditions by the consumer using application methods such as brushing or roller coating. See also Architectural Coatings. 

Paint coatings are perhaps the most versatile and widely applied method of corrosion protection, offering a wide range of decorative colours and textures and the ability to coat complex structures. While the formulation and chemistry of paints is complex, the cured paint film consists, in essence, of a cross-linked organic polymer film (or binder ) containing a dispersed filler (pigment) together with additional solids and inhibitors. A broad spectrum of application methods is used but the vast majority of paint is applied by brush, spray or roller. 

Solvent cements are usually supplied at concentrations of 10-25% solids, with viscosities in the range of 1,000-30,000 cPs. They may be applied by brush, spray, doctor blade, reverse-roll coater, hand roller, trowel, and many other application methods. The proper coating of the adhesive is obtained by establishing the correct viscosity for the particular application method. After application, the solvent is removed by ambient drying or by forced drying in heated ovens or tunnels. 

Preferrred systems of application. The nature of the materials being bonded will many times dictate the preferred method of application. Large surfaces may require a spray or roller coat application. Thin plastics or fabrics may require also a roller or spray. Other applications call for an extrusion, while even others will lend themselves better to trowel, spot, spatula, brush, or other types of application. 

The viscosity of elastomeric adhesives determines their method of application. Typically, solvent-borne rubber compounds require low viscosities for application. Thus, viscosities lower than 0.6 Pas for spray, curtain or dip applications are required, whereas for brush application viscosities lower than 5 Pa s are generally used. Roll- coating technology requires viscosities between 5 and 15 Pa s. 

Many of the finishes applied to other types of metal products can also be applied to zinc die castings, although some differences in formulation as well as occasional differences in method of application may be desirable. The types of finishes applicable to zinc die castings include mechanical finishes (buffed, polished, brushed, and tumbled) electrodeposited finishes (copper, nickel, chromium, brass, silver, and black nickel) chemical finishes (chromale, phosphate, molybdate and black nickel) and organic finishes (enamel, lacquer, paint and varnish, and plastic finishes). Electrodeposited coatings of virtually any metal capable of electrodeposition can be applied to zinc die castings. 

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