flameproofing

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flameproofing

[′flām‚prüf·iŋ]
(chemical engineering)
The process of treating materials chemically so that they will not support combustion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Flameproofing

The process of treating materials so that they will not support combustion. Although cellulosic materials such as paper, fiberboard, textiles, and wood products cannot be treated so that they will not be destroyed by long exposure to fire, they can be treated to retard the spreading of fire and to be self-extinguishing after the ligniting condition has been removed.

Numerous methods have been proposed for flameproofing cellulosic products. One of the simplest and most commonly used for paper and wood products is impregnation with various soluble salts, such as ammonium sulfate, ammonium phosphate, ammonium sulfamate, borax, and boric acid. Special formulations are often used to minimize the effects of these treatments on the color, softness, strength, permanence, or other qualities of the paper. For some applications, these treatments are not suitable because the salts remain soluble and leach out easily on exposure to water. A limited degree of resistance to leaching can be achieved by the addition of latex, lacquers, or waterproofing agents. In some cases the flameproofing agent can be given some resistance to leaching by causing it to react with the cellulose fiber (for example, urea and ammonium phosphate).

Leach-resistant flameproofing may also be obtained by incorporating insoluble retardants in the paper during manufacture, by application of insoluble materials in the form of emulsions, dispersions, or organic solutions, or by precipitation on, or reaction with, the fibers in multiple-bath treatments. The materials involved are of the same general types as those used for flameproofing textiles and include metallic oxides or sulfides and halogenated organic compounds. See Combustion, Textile chemistry

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Flameproof apparatus is basically considered as an enclosure where strength of enclosure, gaps and length of joint should be adequate as per explosive mixture present in the atmosphere.
This last piece, The Memory of My Mother's Underwear Transformed into a Flameproof Drape (all works 2003), agreed very well with the whitewashed neo-baroque stucco ornaments in the gallery, transporting us into places we might have seen in the cinema or somewhere else.
Optical encoders from POSITAL are now also suitable for installation in explosive gas and dust atmospheres, thanks to a newly developed housing with Ex "d" flameproof enclosure protection.
Heat the oil in a flameproof casserole dish and brown the lamb, then remove to a plate.
Used in oil and gas offshore platforms, FPSO turret mounting equipment, marine environments and natural gas processing equipment, these connectors are threaded, flameproof and fabricated to prevent the mixture of explosive gases and the electrical circuits by means of tighter tolerances in mated junctions.
Due to optimum material selection, including a high quality powder coating (>100 mm) and the use of stainless steel fixings, the GHG 64 is a compact, flameproof, copper-free aluminum enclosure with a wide temperature range from --20 degree C to + 40 degree C (-55 degree C to +55 degree C option also available).
Heat the sunflower oil in a flameproof casserole pan, then brown the pork on all sides.
DELIA SMITH''S SLOW BRAISED BELLY PORK WITH BACON, APPLES & CIDER Ingredients 900g belly of pork (six thick-cut slices) 3 medium Cox''s apples (no need to peel) 12 slices or 250g smoked dry-cured streaky bacon 1 large or 2 medium onions 3 fat cloves garlic 18 juniper berries 18 sage leaves 225ml dry cider 55ml cider vinegar 1 dessertspoon lard (or oil) Seasoning A large flameproof casserole with a tightfitting lid.
Heat a little butter in a flameproof, ovenproof dish, add the plums and brown sugar and cook for 5 minutes, then pour on the batter and scatter with flaked almonds, if using.
ATEX-approved for use in hazardous areas, the Xgard IR is Exd flameproof rated.
Heat oil in large flameproof casserole and brown braising steak over fairly high heat.