Wall board

Carbon stock 94 -184 0.55 Wall board, insulating type 14.8 21. 028... 

Substrates protected from different environmental conditions basically include the metals (steel, zinc, aluminum and copper), inorganic materials (plaster, concrete and asbestos), and organic materials (wood, wall-board, wallpaper and plastics). Metals may be surface coated to improve their workability in mechanical processing. 

Copolymers of ethyl acrylate with methacrylate and small amounts of hydroxyl, carboxyl, amine, or amide comonomers are used to prepare high quality latex points for wood, wall board and masonry in homes. 

The MES matrix can be a wall, board, or large paper. The investigators use cards or Post-It notes to record a layout the events. Often investigators transfer the display to a computer for ftirther processing. As new... 

Uses. The insoluble anhydrite is used in cement formulations and as a paper filler the soluble anhydrite is used as a drying agent the hemihydrate is used for wall plaster and wall-board gypsum is used in manufacture of plaster of paris and portland cement. 

At this point a differentiation should be made between a nonflammable and a fire-retardant film. On the one hand, the coating is designed to be applied on a nonflammable substrate and, in this case, the film itself should be as near nonflammable as possible. On the other hand, a fire-retardant film is designed to retard the spread of flame through a flammable substrate. Most commercial paints are fire-retardant to a degree an unpainted wood or wall board surface will burn much more freely if unpainted than if coated with an ordinary flat wall paint such as TT-P-47. There has been a widespread misconception that the dried paint film is a fire hazard, when actually a wood or cellulosic wallboard surface is considerably more readily combustible uncoated than when coated with the average wali paint. 

Cotton Ammonium phosphates are the most effective FRs for cotton as first identified by Gay-Lussac in 1821 and still widely used. All phosphates on heating release phosphoric acid, which catalyses dehydration reactions of cellulose to yield char at the expense of volatiles formation reactions.50 However, ammonium phosphates like mono- or diammonium phosphates are water soluble, hence applicable as nondurable treatments only. Ammonium bromide can be used in combination with ammonium phosphates to provide some vapor-phase FR action. Other examples include borax and boric acid, ammonium sulfamate, and sulfates. These nondurable finishes are useful for disposable fabrics, insulation, wall boards, theatrical scenery, packaging material, paper, etc. Ammonium polyphosphates (APPs) are used in combination with urea to provide semidurable finishes and by curing at 160°C, when some phosphorylation can occur. Semidurable finishes are very useful for materials that may not need frequent washings, e.g., mattresses, drapes, upholstery, carpets, etc. Some commercial examples of semidurable finishes include Flammentin FMB (Thor Specialities), Pyrovatim PBS (Ciba, now marketed by Huntsman), etc.26... 

Sulfates contain S04, which combines with metals and other elements. Gypsum, the most common sulfate, is used to make plaster and wall board. It is often used as gesso or filler in paints, and its massive form (alabaster) has... 

The Ca(H2P04)2 is preferable to Ca3(P04)2 for use as a fertilizer because it is more soluble in water. The CaS04 is known as gypsum and, although natural gypsum is mined in some places, that produced by the preceding reaction is an important constituent in wall board. 

A bulk box, sometimes called bag in box, consists of a box within a box plus other elements such as end pads, PE bag liners, and closing materials (tape, glue, staples). The double-wall corrugated kraft board consists of an outside finer, a corrugating medium, a center finer, another corrugating medium, and an inside liner the single-wall board... 

A similar reaction can be written for the conversion of calcium phosphate.) The solid product CaS04 2H20, called gypsum, is used to manufacture wall-board for construction. 

A sedimentary kaolin, is used in adhesives, wall-board, paint, paper, fertilizer, roofing granules, crayons and powdered soaps. PEERLESS Clay is available in three grades according to fineness of particle size and color. 

Determine the overall unit thermal resistance (the ff value) and the overall heat transfer coefficient (the 0-factor) of a 45 pitched roof built around nominal 2-in X 4-in wood studs with a center-to-center distance of 400 mm. The 90-mm-wide air space betv/een the studs does not have any reflective surface and thus its effective emissivity is 0.84. For a mean temperature of 32.2 C and a temperature difference of 16.7°C, the / -value of the air space is 0.15 m C/W. The lower part of the roof is finished with 13 mm gypsum wall-board and the upper part with 16 mm plywood, building paper, and asphalt shingle roofing. The air space constitutes 75 percent of the heat transmission area, while the studs and headers constitute 25 percent. 

TABLE 3—Standard deviations for 12.7-mm regular wall board. 

All foamed plastics shall be covered by a thermal barrier with the ignition inhibiting characteristics of 1/2 inch gypsum wall board (15-minute finish rating). 

Ethyl Foaming Agent. OSthyl] Alcohol edier sulfate foaming agent for wall-board mfg., air drilling, etc. 

Yersaflex . [W.R. Grace/Organics] Acrylic or vinylidene chloride onul-sion polymers for factory finishes, paints, ceiling tile, wall board, paper coatings, textile treatments, release coatings. 

Figure 7. Cross section of sulfur wall-board structure (7X)...

Other Uses in Structural Materials. Until recently, one-fifth of the total production of bagasse in Louisiana was used to make structural and acoustical wall-board and other building products (12). Panels of sugar-... 

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