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A bed with a duvet. A duvet (UK: / ˈ d uː v eɪ / DOO-vay, US: / d uː ˈ v eɪ / doo-VAY; [1] [2] from French duvet 'down'), usually called a comforter or (down-filled) quilt in American English, [3] [4] [5] and a doona in Australian English, [6] is a type of bedding consisting of a soft flat bag filled with down, feathers, wool, cotton, silk, or a synthetic alternative, and is typically ...
A polyester shirt Close-up of a polyester shirt SEM picture of a bend in a high-surface area polyester fiber with a seven-lobed cross section A drop of water on a water resistant polyester Polyesters can contain one ester linkage per repeat unit of the polymer, as in polyhydroxyalkanoates like polylactic acid , or they may have two ester ...
Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...
As a polyester, it is moderately hydrophobic, so it absorbs little fluid and dries relatively quickly (compared to absorbent fibers such as cotton). The cross-section is non-round, increasing surface area by an estimated 20% (over round fibers) in order to produce a wicking effect via capillary action .
A 2014 ocean survey found that rayon contributed to 56.9% of the total fibers found in deep ocean areas, the rest being polyester, polyamides, acetate and acrylic. [48] A 2016 study found a discrepancy in the ability to identify natural fibers in a marine environment via Fourier transform infrared spectroscopy . [ 49 ]
During the 2nd century C.100 -C.200 it was the first time human civilisation was introduced to material of cork, and it was only until the 19th century when cork was widely used leading to major industrial production. [20] Cork, which is harvested from the Oak trees generally found in Portugal, Spain and other Mediterranean countries.