Flow brush

This cleaner can be applied by spray, dip or flow-brush. It should be left on clean metal long enough to wet it completely, and on rusted metal long enough to loosen the rust. It is then flushed off with water, preferably hot water. 

Adhesives normally are applied by one of the following methods brush, flow brushes, dipping, glue guns, rollers, flow rollers, and spray. 

Rowing is particularly useful for applying liquid adhesive to flat surfaces having irregular shapes. This method is superior to brushing in that it provides a more uniform adhesive film thickness and a higher production rate. In this method, the adhesive is fed under pressure through either a simple nozzle or a hollow brush. When a nozzle is used, the device is known as a flow gun. With a brush it is called a flow brush. The adhesive should be... 

Strom, m. stream, ciirrent, flow, flux (Elec.) current, -abnahme,/. current drop, current fall, -abnehmer, m. (Elec.) brush (also, consumer). -abweichung, /. variation of current. -anzeiger, m. current indicator, -art, /. (Elec.) kind of ciirrent. -aufnahme, /. (Elec.) charging, -bahn, /. path eff current, -bild, n. flow sheet. -dicht , -dichtigkeit, /. current density. 

Thixotropic Paint a paint which while free-flowing and easy to manipulate under a brush, sets to a gel within a short time when it is allowed to remain at rest. Because of these qualities a thixotropic paint is less likely to drip from a brush than other types and can be applied in rather thicker films without running or sagging. 

The slushing compounds are a variant of the smearing types, and possess some Row properties at room temperature so that brush marks produced during application.are reduced- Some materials contain solvent, so that they ate free-flowing as applied, but sliBien wl n the solvent evaporates. 

An understanding of non-Newtonian behaviour is important to the chemical engineer from two points of view. Frequently, non-Newtonian properties are desirable in that they can confer desirable properties on the material which are essential if it is to fulfil the purpose for which it is required. The example of paint has already been given. Toothpaste should not flow out of the tube until it is squeezed and should stay in place on the brush until it is applied to the teeth. The texture of foodstuffs is largely attributable to rheology. 

There are numerous applications where the development of high viscosity is necessary in a finished product. For example, thickeners, mainly based on poly(acrylic acid), are used to give body to so-called emulsion paints. Emulsion paints are not formulated from true emulsions (Le. stable dispersions of organic liquids in water), but are prepared from latexes, that is, dispersions of polymer in water. Since latexes do not contain soluble polymers, they have a viscosity almost the same as pure water. As such, they would not sustain a pigment dispersion, but would allow it to settle they would also fail to flow out adequately when painted on to a surface. Inclusion of a thickener in the formulation gives a paint in which the pigment does not settle out and which can readily be applied by brush to a surface. 

The so-called turbulent "V-shaped flames" are the flames anchored behind a rod or a catalytic wire in a flow where turbulence is generated by an upstream grid. Trinite et al. [7,40] and Driscoll and Faeth [41] have studied such flames. Instantaneous images of rare beauty have been obtained from which it is very clearly seen that the turbulent flame brush width is continuously increasing downstream of the stabilizing rod, see Figure 7.1.13. 

Fig. 3.68 shows the longitudinal section and the bottom view of the electrode and also a section of the streamlines of flows in the solution near the bottom and symmetrical to. the axis of rotation of the electrode the electric circuit is provided for instance by brush contacts at the top of the brass shaft of the disc and/or at the brass collar of the ring it is essential for the proper functioning of the electrode that its rotation is kept rigidly centralized by means of bearings in order to exclude swinging as far as possible. 

The same might be said of ordinary house paint. Paint that has a low resistance to flow is runny and will likely not provide satisfactory coverage of a wall with just one coat. It is therefore judged to be of poorer quality than one that does provide good one-coat coverage. On the other hand, paint that is thick and gummy may also be judged to be of poorer quality because it may not be possible to apply it uniformly with either a brush or roller. 

Shaffer (S5) also made some exploratory evaluations of the electrostatic atomization of dibutyl phthalate using a camel s hair brush for the atomizing nozzle. On a count basis 73% of the particles were smaller than 10 microns and the largest particle obtained was 40 microns. The energy input corresponded to 0.5 cal/g liquid atomized (0.00026 kWh/lb) and the charge level on the particles as atomized corresponded to a value of Sps of the order of 3-5 V/micron. Current and flow rate measurements reported by Vonnegut and Neubauer (V4) would correspond to an energy input of 0.1 kWh/lb. 

---