Fiber board

The 1993 price of high purity anhydrous nickel difluoride was 0.55 /g in 100- or 250-g quantities. Small quantities are stored and shipped in polyethylene bottles, whereas large amounts are shipped in fiber board dmms with polyethylene liners. 

The total U.S. consumption of H2TiFg is 20 t/yr. The 1993 price varied between 2.80 to 7.50/kg depending on quantity and specifications. It is packaged in DOT approved polyethylene-lined dmms and the salts in polyethylene-lined fiber board dmms. 

Amino and Phenolic Resins. The largest use of formaldehyde is in the manufacture of urea—formaldehyde, phenol—formaldehyde, and melamine—formaldehyde resins, accounting for over one-half (51%) of the total demand (115). These resins find use as adhesives for binding wood products that comprise particle board, fiber board, and plywood. Plywood is the largest market for phenol—formaldehyde resins particle board is the largest for urea—formaldehyde resins. Under certain conditions, urea—formaldehyde resins may release formaldehyde that has been alleged to create health or environmental problems (see Amino RESINS AND PLASTICS). 

Adhesives for paper tubes, paperboard, cormgated paperboard, and laminated fiber board are made from dispersions of clays suspended with fully hydrolyzed poly(vinyl alcohol). Addition of boric acid improves wet tack and reduces penetration into porous surfaces (312,313). The tackified grades have higher solution viscosity than unmodified PVA and must be maintained at pH 4.6—4.9 for optimum wet adhesion. 

Wood (qv) is arguably the oldest building material used by humans to constmct their dweUings. It is a natural product obtained from trees, used in both stmctural and decorative appHcations. The chemical composition of wood is largely cellulose (qv) and lignin (qv). Today there are a variety of composite or reconstituted wood products, such as plywood, particle board, wood fiber boards, and laminated stmctural beams, where small pieces of wood or wood fiber are combined with adhesives to make larger sheets or boards (see Laminates). 

Faser-pflanze, /. fiber plant, textile plant, -platte, /. fiber board, -richtung, /. direction of the fiber or grain, -rohstoff, m. fibrous raw material, -salz, n. fibrous salt, -schutz-mittel, n. fiber-protecting agent. 

In order to control the three factors determining heat transfer, much effort has been spent on developing vacuum insulation for high—temperature batteries involving the use of microporous powders pressed to boards, glass fiber boards, or multifoil insulation. 

Glass fiber boards are manufactured from glass microfibers with a diameter of less than 1pm, by pressing into plates [44]. The heat treatment at 500 °C after the pressing ensures the stability of the shape. The boards have a low compressibility (about 5 percent). This will be obtained by adjusting the density of the boards to 0.3gem-3. ... 

Glass fiber board consisting of a boro-silicate glass shows a thermal conductivity under pressure which is dependent on the temperature (Table 17). There is a natural concern about the safety of any fiber mate-... 

Table 17. Glass fiber board thermal insulating material...

PCM Composite Materials to Improve Handling and Applicability Rubitherm produces a set of different composite materials, mainly to improve handling and applicability. Some composites, which are based on different granulates and fiber boards are shown in Figure 119. 

Figure 119. PCM composite materials produced by Rubitherm compound (PK), granulate (GR), fiber board (FB) and powder (PX)...

Since the last oil crisis many attempts have been made to incorporate PCM into building materials like plaster, wood or fiber boards. At the beginning this was done by impregnation, recently micro encapsulation has been preferred as it reliably prevents leakage. The potential of PCM to reduce... 

Felby C, Hassingboe J and Lund M. 2002. Pilot-scale production of fiberboards made by laccase oxidized wood fibers board properties and evidence for cross-linking of lignin. Enzyme Microb Technol 31(6) 736—741. 

Formaldehyde Manufacturing, fiber board, Very high... 

Gomez-Bueso, J., Westin, M., TorgUsson, R., Olesen, P.O. and Simonson, R. (1999a). Composites made from acetylated UgnoceUulosic fibers of different origin. Part I. Properties of dry-formed fiber boards. Holz als Roh- und Werkstoff, 57(6), 433-438. 

Breslow, L. (1984). Nonoccupational health risks of asbestiform fibers. Committee on Nonoccupational Health Risks of Asbestiform Fibers, Board of Toxicology and Environmental Health Hazards, Commission on Life Sciences, National Research Council, Washington, DC. 

Explosion Unit Operation (See also "Explosive Disintegration"). The explosion technique has been applied successfully for the modification of substances and for separation of components, as well as for size reduction of materials. This method has been used in rubber reclaiming, wood pulping, manufacture of fiber board, pulverization of minerals and coal and finally for the prepn of puffed cereals... 

Adhesive, -water-Resistanc (For Sealing Fiber-board Boxes) US Spec MMM-A-250A (April 1967) (For Sealing Waterproof Paper) US Spec MMM-A-260A (Sept 1966)... 

Methyl eugenol 013,4-dimethoxy-l-allylbenzene [95-15-2] was fust characterized in 1915 as a powerful attractant for the male oriental fruit fly, Dams dorsalis, and attracts at least 60 other closely related Dams spp. Raspberry ketone [5471-51-2] or l-(4-/>-hydroxyphenyl)-2-butanone [5471-51-2] (174) is an equally powerful attractant for the melon fly, Dams mmrbitae, and the Queensland fmit fly, D. tryoni, and at least 180 other closely related Dams spp. The acetyl ester (cue-lure) (175) is more volatile and is a synthetic parakairomone especially effective for monitoring infestations by these species. Methyl eugenol and cue-lure [3572-06-3] have been used successfully in "male annihilation" of the oriental fmit fly and the melon fly by applying them to fiber board blocks or pieces of twine together with malathion or naled insecticides and distributing them over infested areas at doses of 15 g of attractant and 1 g of the insecticide per ha. 

By an intumescent-type coating is meant a coating that will swell, char, bubble, and produce a firm, charred ash when a flame is impinged upon it, immediately shielding the fiber board from the flame. 

All the above formulations have been investigated and evaluated on perforated and unperforated Celotex fiberboard. Results demonstrate that a satisfactorily formulated intumescent water- or oil-base paint is the best type of paint to apply to acoustical fiber board to secure optimum fire or flame resistance. These paints, by their intumescent nature, tend to close the openings in the acoustical fiber board and insulate the basic fiber under the coating. 

Just because a paint itself will not burn, it does not follow that it will produce desirable fire or flame resistance on an acoustical fiber board. 

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