Cold corrugating

Mixtures of waxy, regular, and high amylose starches are degraded with a mixture of sodium persulfate, sodium sulfite, boric acid, and caustic, and cooked at 90°C (194°F) and about 33% solids to form a starch adhesive that hardens on cooling. The cold corrugating process is described in other references. " ... 

Touzinsky, G. F., and Sprague, C. H., Fundamentals of the Cold Corrugating Process Adhesives and Bonding, Annual Meeting—TAPPI, 427-432 (1982). 

Bending and Forming Pipe may be bent to any radius for which the bend-arc surface will be free of cracks and substantially free of buckles. The use of bends which are creased or corrugated is permitted. Bending may be by any hot or cold method permissible within the radii and material characteristics of the pipe being bent. 

To reduce the radiation power input, several solutions are possible inserting n thermally floating shields between the cold and hot surfaces, the transmitted power is reduced by a factor (n + 1). The practical realization is the so-called superinsulation used in the dewar of Fig. 5.1 a few layers of a thin metallized insulating foil about 4 xm thick is used. To prevent thermal contact between adjacent layers, the material is often corrugated or a thin layer of fibreglass cloth is inserted between layers. 

Units like Figure 8.6(h), with similar kinds of passages for the hot and cold fluids, are used primarily for gas service. Typically they have surfaces of the order of 1200 m /m (353 sqft/cuft), corrugation height 3.8-11.8 mm, corrugation thickness 0.2-0.6 mm, and fin... 

When the two fluids exchanging heat must be kept clean, plate-and-frame heat exchangers made of stainless steel are commonly used. A typical configuration, shown in Figure 13.12a, consists of a series of pressed corrugated plates on close spacing. Hot and cold fluids flow on opposite sides of a plate. Heat transfer coefficients are high because of the enhancement of... 

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