Glare®

Fig. 1. Wind-load data for he at-strengthened and laminated 3.2-mm glass. Architect s specified probabiUty of breakage is 8/1000 laminates for a 1-min uniform wind-load duration. Four sides supported in weathertight rabbet. Curves for different glaring areas A, 0.93 m (10 ft ) B, 1.39 m (15 ft ) C, 1.86...

J. M. Clinch, Study of Reduction of Glare, Reflection Heat and Noise Transfer in Air Traffic Control Tower Cab Glass, FAA-RD-72-65, AD747069, NTIS, Springfield, Va., 1972. 

R. N. Pierce and W. R. Blackstone, Impact Capability of S afety Glafing Materia Is, PB195040, Southwest Research Institute, San Antonio, Tex., 1970 contaias detailed descriptions of test equipment, methods, and results for all types of glarings. 

Most laminated safety glarings are glass—PVB—glass tdlayer composites, but bullet- and projectile-resistant laminates. Laminates for other specialty uses maybe made with more than three layers. In addition to glass, poly(ethylene terephthalate) (PET), acryUc, and polycarbonate stmctural components (92) are used in specialty laminated glaring products. 

Many grades of interlayer are produced to meet specific length, width, adhesion, stiffness, surface roughness, color (93,94), and other requirements of the laminator and end use. Sheet can be suppHed with vinyl alcohol content from 15 to about 23 wt %, depending on the suppHer and appHcation. A common interlayer thickness for automobile windshields is 0.76 mm, but interlayer used for architectural or aircraft glaring appHcations, for example, may be much thinner or thicker. There are also special grades to bond rear-view mirrors to windshields (95,96) and to adhere the components of solar cells (97,98). Multilayer coextmded sheet, each component of which provides a separate property not possible in monolithic sheet, can also be made (99—101). 

Polybutenes enjoy extensive use as adhesives, caulks, sealants, and glaring compounds. They are used as plasticizers in mbber formulations with butyl mbber, SBR, and natural mbber. In linear low density polyethylene (LLDPE) blends they induce cling to stretch-wrap films. Polybutenes when modified at their unsaturated end groups with polar fiinctionahty are widely employed in lubricants as dispersants. Blends of polybutene with polyolefins produce semisoHd gels that can be used as potting and electrical cable filling materials. 

It is clear from the RSF data shown in Figure 2 that even without the use of RSFs, a semiquantitative analysis accurate to within an order of magnitude is quite possible, and GDMS indeed will provide full coverage of the periodic table. The analysis of a material of unknown composition will be elementally complete to trace levels, with no glaring omissions that may eventually return to haunt the end user of the material. 

Apart from physical discomfort and irritation, poor lighting can induce errors in reading valve labels or instruments on the control panel. Direct or reflected glare can be another problem in many work situations. Having to avoid the glare may constitute another task the worker has to perform, which can divert him or her from the primary job responsibility. 

Swain and Guttmann (1983) cite an incident in which the problem of glare had been so severe that the workers disconnected many of the lamps, with the result that a flashlight was considered a standard accessory for reading certain displays. 

Fauske, H. K., M. A. Grolmes, and G. LI. Glare, Process Safety Evaluation Appl) ing DIERS Mediodolog) to Existing Plant Operations, Plant Operations Progress, Vol. 8, No. 1, 1989, p. 40. 

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