Sheets, drying

Sheet Drying. At a water content of ca 1.2—1.9 parts of water per part of fiber, additional water removal by mechanical means is not feasible and evaporative drying must be employed. This is at best an efficient but cosdy process and often is the production botdeneck of papermaking. The dryer section most commonly consists of a series of steam-heated cylinders. Alternate sides of the wet paper are exposed to the hot surface as the sheet passes from cylinder to cylinder. In most cases, except for heavy board, the sheet is held closely against the surface of the dryers by fabrics of carefuUy controUed permeabiHty to steam and air. Heat is transferred from the hot cylinder to the wet sheet, and water evaporates. The water vapor is removed by way of elaborate air systems. Most dryer sections are covered with hoods for coUection and handling of the air, and heat recovery is practiced in cold climates. The final moisture content of the dry sheet usually is 4—10 wt %. 

Nerve-VX 100-p, drops 25 sheets Dry undamaged detector, potential... 

Create a secure salvage area with locks, fans, tables, shelves, plastic sheeting, drying materials, and clean water. 

Dryer Figure 12-10 shows a simple sheet drying system. Hot air enters the dryer and contacts a wet sheet. The sheet leaves a dryer with a lower moisture content, and the air leaves the dryer with a higher humidity. 

Prepare two tanks and one strip 3 cm wide of each paper as described for experiment 1. Apply 10 pi of the test solution as a streak there is no need to dry the spot. Put the paper in the tank and start the run immediately. For comparison, run a strip in a third gas jar using No. 1 paper, and the solvent used in experiment 1. Allow a run of 10-15 cm, and then remove the sheets, dry and apply the locating reagent. 

Formulations were prepared by dissolving the base resin in 100 phr of 2-butanone, then adding the photoinitiator and any monomers to the resin solution. Films were cast from the resin solution onto 75 urn polyethylene terephthalate (PET) sheets, dried in a convection oven at 60°C for 15 minutes to remove residual solvent, and cured. A LESCO C612 conveyor system with Fusion Systems F450-10 irradiator was used for curing. A 300 W/inch Fusion "V" lamp was used in all experiments. Cure dose was varied by changing belt speed at constant irradiator power. 

Ribbed smoked sheet Coagulated sheets, dried, and smoked latex. Five grades available (RSS1-5)... 

The Rubber Manufacturers Association has a further set of standards for quality and packing of latex natural rubber grades. Table 9.2 defines the eight types of rubber covered in their specifications. Here, coagulated latex is sheeted, dried, and packed into bales of up to 113.5 kg. Grading is by visual inspection. Quality assurance laboratories have sets of visual standards for inspections (The Rubber Manufacturers Association, 1979). 

Air floaters used in the graphic arts industry operate at web tensions on the order of 5-6 kg/cm in the coating application, tensions as low as 0.03 kg/cm may be needed. Higher tension stabilizes the sheet. Drying rates np to 60 kg/m h are attained in commercial installations. Web speeds of up to 1100 m/min can be handled with web widths of up to 8 m. 

Stationary phase Porous glass sheet (5 cm x 5 cm x 0.5 mm) pore diameter 700 nm mean pore volume 0.46 cm /g specific surface area 6.6 M /g). Mobile phase M = n-Butanol-benzene-1.0 M HNO3-I.O M HCl (75 69 4 2) Afj = acetone-3.0 M HCl (99 1). Detection (a) fluorescent reaction by heating (3 il solution of each cation was spotted on the glass sheet, dried and heated in an electric muffle furnace at 100 - 700°C for 15 min., irradiated in the dark with a UV lamp at 254 nm to reveal the fluorescence of the spots), (b) 0.05% solution of dithirone in chloroform or 1% solution of 8-hydroxy-quinoline in methanol followed by exposure to ammonia gas. The spots detected by (a) overlapped the triplicate spots detected by (b), confirming that the fluorescent compounds were not due to impurities. Remarks Examination of fluorescence reactions of inorganic cations e.g. Al ,... 

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