Paper stock

Although it has been reported (138) that decolorization of wastewater containing reactive azo dyes with sodium hydrosulfite is possible only to a limited extent, others have demonstrated good reduction (decolorization). For example, using zinc hydrosulfite for the decolorization of dyed paper stock (139) resulted in color reduction of 98% for azo direct dyes (139). A Japanese patent (140) describes reducing an azo reactive dye such as Reactive Yellow 3 with sodium hydrosulfite into its respective aromatic amines which ate more readily adsorbable on carbon than the dye itself. This report has been confirmed with azo acid, direct, and reactive dyes (22). 

Pressure drop data for the flow of paper stock in pipes are given in the data section of Stondords of the Hydroulic Jn.stitute (Hydraulic Institute, 1965). The flow behavior of fiber suspensions is discussed by Bobkowicz and Gaiivin (Chem. Eng. Sci., 22, 229-241 [1967]), Bugliarello and Daily (TAPPJ, 44, 881-893 [1961]), and Daily and Bugliarello (TAPPJ, 44, 497-512 [1961]). 

Fatty-acid soaps Alkali, alkaline earth, and other metal soaps sodium stearate aluminum stearate Gear oils paper stock paper sizing glue solutions... 

FIG. 18 13 Flow pattern with a paper-stock propeller, unhaffled vertical off-center position. 

Vacuum Removal. This approach is used in the paper industry for denaturing the paper, in which a vacuum is applied under the paper stock,... 

Pulpy solids such as paper stock Single suction. Double suction only used on very slight solids concentrations and then with special end clearance wearing fits. Closed. Open type used to be standard but change to end clearance wearing fits made closed impellers better suited. 

Figure 5-5G. Curved-blade turbine, devei-oped especlaily for agitating fibrous materials such as paper stock. Also used on oil well drilling muds. This impeller gives fast, thorough turnover without need for the usual tank baffling or mid-feather construction. Courtesy of Lightnin (formerly Mixing Equipment Co.), a unit of General Signal.

Silverfish and firebrats come into the plant in cartons and incoming paper stocks. They are particularly likely to infest returnable cartons from old deliveries. 

When you visit an office-supply store or print shop to purchase resume paper, you will be surprised at how many different shades of white there are. You will also find paper stocks in several different weights and textures, some containing watermarks, and most will have at least some cotton content. 

For traditional printed resumes, it s also acceptable to use a slate or light gray paper. Avoid using bright-colored or dark-colored papers, however, which will cause your resume to stand out for the wrong reasons. As for the weight of the paper, 24- or 28-pound bond paper works fine. One way to help your resume stand out is to use a heavier paper stock. Expect to pay between. 15 and 1.00 per sheet for quality resume paper unless you buy a box of 50-500 sheets at an office-supply store. 

Warning Don t try to fold a resume that s printed on a heavy paper stock (over 28-pound basis weight) in order to insert it into a business-size envelope. If you re using a heavier paper stock for a resume package, send it in a large (9 by 12-inch) envelope. 

When choosing resume paper, make sure you see and feel a sample of the paper stock prior to purchasing a sealed package of that paper. Finally, when printing your resumes and cover letters on a laser or high-quality ink-jet printer, make sure the paper you choose was designed for this equipment. 

Forrest F, Grierson GAH (1931) Friction losses in cast iron pipe carrying paper stock Paper Trade J 298... 

Boxboard General term designating the paperboard used for fabricating boxes. It may be made of wood pulp or paper stocks or any combinations of these and may be plain, lined, or clay coated. Terminology used to classify boxboard grades is normally based... 

Cationic starch must be thermally dispersed before it is added to the papermaking furnish. In batch cooking, a slurry with up to 4% starch content is heated to a temperature of 93-96°C (200-205°F) for 20-30 minutes. In jet cooking, the solids can be raised to 6% and the temperature to 102-116°C (215-240°F) with short retention. For waxy maize starch, the cooking temperature should not exceed 107°C (225°F). The starch cook must be diluted to <1% solids before addition to the paper stock. 

What is the friction loss in 800 ft of 6-in schedule 40 pipe when 400 gal/min (0.025 m3/s) of sulfate paper stock is flowing The consistency of the sulfate stock is 6 percent. 

FIGURE 6.4 Friction loss of paper stock in 4-in (0.10-m) steel pipe. (Goulds... 

Correct the friction loss for the liquid consistency. Friction-loss factors are usually plotted for one type of liquid, and correction factors are applied to determine the loss for similar, but different, liquids. Thus, with the Goulds charts, a factor of 0.9 is used for soda, sulfate, bleached sulfite, and reclaimed paper stocks. For ground wood, the factor is 1.40. 

Related Calculations. Use this procedure for soda, sulfate, bleached sulfite, and reclaimed and ground-wood paper stock. The values obtained are valid for both suction and discharge piping. The same general procedure can be used for sand mixtures, sewage, trash, sludge, foods in suspension in a liquid, and other slurries. 

Fresh or salt water, acid or alkali, oil, gasoline, slurry, or paper stock ... 

The pulp-water systems encountered in the agitation of paper stock represent a highly specialized case of solid-liquid agitation, discussed in a few papers (CIO, K5, 04), which will not be reviewed here. Lamont (L2) discusses the operation of pachuca tanks, used for ore-leaching operations, in which agitation results from air introduced at the tank bottom. 

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