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Hygroscopicity is a general term used to describe a material's ability to absorb moisture from the environment. [31] There is no standard quantitative definition of hygroscopicity, so generally the qualification of hygroscopic and non-hygroscopic is determined on a case-by-case basis.
Equilibrium moisture content of wood versus humidity and temperature, according to the Hailwood-Horrobin equation. The equilibrium moisture content (EMC) of a hygroscopic material surrounded at least partially by air is the moisture content at which the material is neither gaining nor losing moisture.
Composite lumber comes from the manufacturer as a finished product. There is no need to stain, sand, or paint the material. Composite materials usually cost more than lumber, but their long life and low-maintenance requirements could make them more economical in the long run. Most composites also come with a warranty ranging from several years ...
Preserved wood is used most often for railroad ties, utility poles, marine piles, decks, fences and other outdoor applications. Various treatment methods and types of chemicals are available, depending on the attributes required in the particular application and the level of protection needed.
Fladry lines, made of cloth, metal and/or other materials, are sometimes used on fences to discourage wolves from entering a livestock enclosure. Deer and many goats can easily jump an ordinary agricultural fence, and so special fencing is needed for farming goats or deer, or to keep wild deer out of farmland and gardens. Deer fence is often ...
Hardboard has often been used as the surface material in clipboards, especially older models. It is also used as the final layer in many skateboard ramps and the half-pipe . Hardboard is also used extensively in theatrical environments, often used as the final painted surface of a stage and on walking surfaces of constructed scenery.
Close boarded fencing, strong and robust fence constructed from mortised posts, arris rails and vertical feather edge boards; Composite Fencing, made from a mixture of recycled wood and plastic; Expanding fence or trellis, a folding structure made from wood or metal on the scissor-like pantograph principle, sometimes only as a temporary barrier
The air-cooler used in the hygroscopic cycle cools a liquid flow with concentrated hygroscopic compound, with an overall volumetric heat capacity much higher than the steam traditionally condensed in the air cooled condenser mentioned earlier, thus reducing the power needed for ventilation, [8] and needing less surface area for heat exchange ...
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