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Acrylic is lightweight, soft, and warm, with a wool-like feel. [2] It can also be made to mimic other fibers, such as cotton, when spun on short staple equipment. Some acrylic is extruded in colored or pigmented form; others are extruded in "ecru", otherwise known as "natural," "raw white," or "undyed." Pigmented fiber has the highest color ...
A slab of pykrete Pykrete is made of 14% sawdust and 86% water by mass.. Pykrete (/ ˈ p aɪ k r iː t /, PIE-creet) [1] is a frozen ice composite, [2] originally made of approximately 14% sawdust or some other form of wood pulp (such as paper) and 86% ice by weight (6 to 1 by weight).
Fake fur can be made from a variety of materials, including polyester, nylon, or acrylic. First introduced in 1929, fake furs were initially composed of hair from the South American alpaca. The ensuing decades saw substantial improvements in their quality, particularly in the 1940s, thanks to significant advances in textile manufacturing.
Modacrylic fibers are modified acrylic fibers made from acrylonitriles, but larger amounts of other polymers are added to make the copolymers. The modacrylic fibers are produced by polymerizing the components, dissolving the copolymer in acetone, pumping the solution into the column of warm air (dry-spun), and stretching while hot. [3]
By the 1950s, fabrics made from synthetics and treated cotton were described as "wash-and-wear" to point out that there was no need to iron them. [3] The claim was thought somewhat dubious in the sense that they could require some touch-up ironing. [ 3 ]
The TPRC recommended values are for well annealed 99.998% pure iron with residual electrical resistivity of ρ 0 =0.0327 μΩ⋅cm. TPRC Data Series volume 1 page 169. [8] Iron, cast: 55 [5] [36] Tadokoro Cast Iron* White 12.8 13.3 14.3 14.5 17.3 Grey 29.5 29.7 30.0 30.1 31.1 List: Tadokoro, curves 39 & 40 in TPRC Vol. I, pp 1130–31 [8 ...
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The material is made by the 3M Corporation and was first sold in 1979. [2] It was originally marketed as an inexpensive alternative to down; at the time, 3M claimed it was twice as warm as an equivalent amount of any natural material. [3] [4] Originally designed for clothing, it later became popular as an acoustic damping material. [5]