Flooring electric resistivity

Low-voltage electric resistance heater cables fixed to the structural floor slab and then protected within a 50 mm thickness of cement and sand to give a suitable surface on which the floor vapour barrier can be laid. The heating is thermostatically controlled, and it is usual to include a distance reading or recording thermometer to give visual indication of the temperature of the floor at several locations below the insulation. 

A 2.75-m-liigh room with a base area of 3,7 m X 3.7 ui is to be heated by electric resistance heaters placed on the ceiling, which is maintained at a uniform temperature of 32°C at all limes, The floor of the room is al 17°C and has an emissivity of 0.8. The side surfaces arc well insulated. Treating the ceiling as a blackbody, determine the rate of heal loss from the room through the floor. 

OTHER COMMENTS used in the manufacture of acid-proof coverings in floors, tables, sinks, etc. used in switchboard panels of high electrical resistance sue in crayons for marking cloth, metal, and glass has also been used in ceramics, cosmetics, pharmaceuticals, putty, plaster, oilcloth, and as a filler in paints. 

Flooring with reduced electric resistivity. [Data from Dees, m. Fetter, r. K Musser, D. L., US Patent 5,073,425, Dec. 17,1991.]... 

The fact that the polymer contains no halogens along with certain unique compounding techniques for flame resistance prompts the selection of ethylene—acryflc as jacketing material on certain transportation/mifltary electrical cables and in floor tiles. 

Epoxy resins find a large number of uses because of their remarkable chemical resistance and good adhesion. Epoxy resins are excellent structural adhesives. When properly cured, epoxy resins can yield very tough materials. They are used in industrial floorings, foams, potting materials for electrical insulations, etc. One of the principal constituents in many of the Fibre-reinforced plastics (FRP) is an epoxy polymer. 

Medium-sized household appliances Vacuum cleaners Eloor care devices Aesthetics Impact resistance Electrical insulation Antistatic behaviour Cost Resistance to floor care products... 

Most polystyrene products are not homopolystyrene since the latter is relatively brittle with low impact and solvent resistance (Secs. 3-14b, 6-la). Various combinations of copolymerization and blending are used to improve the properties of polystyrene [Moore, 1989]. Copolymerization of styrene with 1,3-butadiene imparts sufficient flexibility to yield elastomeric products [styrene-1,3-butadiene rubbers (SBR)]. Most SBR rubbers (trade names Buna, GR-S, Philprene) are about 25% styrene-75% 1,3-butadiene copolymer produced by emulsion polymerization some are produced by anionic polymerization. About 2 billion pounds per year are produced in the United States. SBR is similar to natural rubber in tensile strength, has somewhat better ozone resistance and weatherability but has poorer resilience and greater heat buildup. SBR can be blended with oil (referred to as oil-extended SBR) to lower raw material costs without excessive loss of physical properties. SBR is also blended with other polymers to combine properties. The major use for SBR is in tires. Other uses include belting, hose, molded and extruded goods, flooring, shoe soles, coated fabrics, and electrical insulation. 

Conductive floors provide effective control of static electricity Available in the form of screeds, self-levelling floors and floor coatings Water resistant... 

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