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Wool is the textile fiber obtained from sheep and other mammals, especially goats, rabbits, and camelids. [1] The term may also refer to inorganic materials, such as mineral wool and glass wool, that have some properties similar to animal wool. As an animal fiber, wool consists of protein together with a small percentage of lipids. This makes ...
Advanced Placement (AP) Human Geography (also known as AP Human Geo, AP Geography, APHG, AP HuGe, APHug, AP Human, HuGS, AP HuGo, or HGAP) is an Advanced Placement social studies course in human geography for high school, usually freshmen students in the US, culminating in an exam administered by the College Board. [1]
Yarn Preparation: Fibers are spun into yarns and prepared with specific properties tailored for either the warp (longitudinal yarns) or the weft (transverse yarns). A graphic with Arabic text distinguishing raw fibers from processed threads and woven fabric. Warping: The warp yarns are arranged on a beam to prepare for weaving.
Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. [ 1 ] Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation ), filtration , soundproofing , and hydroponic growth medium.
Fibre diameter is the most important characteristic of wool in determining its value. Every fleece comprises a very wide range of fibre diameters—for example a typical Merino fleece will contain fibres of as low as 10 microns in diameter, and there could be fibres with diameters exceeding 25 microns, depending on the age and health (or ...
The relative alignment of the keratin fibrils significantly impacts the mechanical properties. In human hair the filaments of alpha keratin are highly aligned, giving a tensile strength of approximately 200MPa. This tensile strength is an order of magnitude higher than human nails (20MPa), because human hair's keratin filaments are more aligned ...
The surface of woven fabrics is often roughened with a raising card to create a softer feel, higher volume and greater thermal insulation [11] Vicuña wool is considered the rarest and most expensive legal wool in the world; in 2010, raw wool traded for about 7-15 dollars per ounce. [12] The sorted and spun yarn trades at about $300 per ounce.
Excelsior, or wood wool. Wood wool, known primarily as excelsior in North America, is a product made of wood slivers cut from logs. It is mainly used in packaging, for cooling pads in home evaporative cooling systems known as swamp coolers, for erosion control mats, and as a raw material for the production of other products such as bonded wood wool boards.