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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 ...
The purpose of the inner layer is to draw sweat away from the skin to the outer layers to make them feel warmer. If a piece of clothing does not transfer moisture well, it is not strictly an inner layer garment but simply a mid-layer garment. Wool has a combination of wicking and water-repelling properties [1] and is highly odour-resistant. [2]
European pillow (or Continental pillow) A Euro or Continental pillow – a large square pillow – is a decorative pillow that sits back against the headboard. These are often placed behind the standard size pillow shams as a backdrop, or on top of standard pillows as a coordinated set with a duvet cover.
The yarn is 100% polyester or a blend of 45% polyester fibers and 55% merino wool, and is used in socks, sweaters, base layers, and accessories intended mainly for outdoor wear. [ 3 ] In 2010, PrimaLoft was the first maker of branded insulation to be recognized for compliance with the bluesign criteria for environmental effect. [ 4 ]
Down rated 500–650 in 3 /oz (290–380 cm 3 /g) is warm enough and light enough for most conditions, and 800–900 in 3 /oz (460–520 cm 3 /g) fill is used for very lightweight and/or very cold-weather gear. Down is warm, lightweight and packable. If well cared for, it retains its loft up to three times longer than do most synthetics. [38]
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 .
An example of steady state conduction is the heat flow through walls of a warm house on a cold day—inside the house is maintained at a high temperature and, outside, the temperature stays low, so the transfer of heat per unit time stays near a constant rate determined by the insulation in the wall and the spatial distribution of temperature ...
Polycarbonate polyols are more expensive than other polyols and are thus used in more demanding applications. [31] [32] They have been used to make an isophorone diisocyanate based prepolymer which is then used in glass coatings. [33] They may be used in reactive hotmelt adhesives. [34] All polyols may be used to produce polyurethane prepolymers.