By J E McIntyre
Man made fibres account for roughly 1/2 all fibre utilization, with purposes in each box of fibre and fabric know-how. even supposing many periods of fibre in accordance with artificial polymers were evaluated as most likely helpful advertisement items, 4 of them - nylon, polyester, acrylic and polyolefin - dominate the industry. those 4 account for about ninety eight% via quantity of man-made fibre creation, with polyester on my own accounting for round 60%. man made fibres: nylon, polyester, acrylic, polyolefin presents a short historical past of the early reviews that ended in this case, then seems to be intimately on the improvement and current prestige of every type in 4 great chapters. Synthesis of chemical intermediates, polymerisation equipment, fibre spinning and orientation expertise, texturing strategies, creation of microfibres, and chemical versions, e.g. for transformed dyeability, are thought of intimately. This finished and available ebook will entice cloth technologists in business and educational examine, chemical and artificial fibre providers, and yarn and upholstery brands.
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Extra info for Synthetic Fibres : Nylon, polyester, acrylic, polyolefin
Example text
5 Fibre properties The inherent properties of nylon and those characteristics that can be engineered into the fibre and ultimately into the final textile product determine the many enduses of nylon. No fibre can be perfect for every use, but it must offer a reasonable balance of performance, market value, economics and processability. The properties of a textile fibre may be considered under three different categories: geometric, physical and chemical. These characteristics are measurable and quantifiable.
8] Two other nylons are used commercially to a small extent, nylons 6,10 and 6,12. 15 Nylon 6,12 is produced as a monofilament under the brand name Tynex (DuPont, USA), for use in floor care, paint, tooth and cosmetic brushes. 1 Extent of polymerisation In the preparation of any polyamide, the relative molecular mass, often called the molecular weight, of the polymer and its control are of vital importance. 1 Schematic graph of the effect of the polymer relative molecular mass (RMM) on the nylon fibre tenacity.
After drawing, the yarn is again wound on to a package: this may be with twist using a ring and traveller, or without twist onto a cheese. If the yarn is wound without twist, it must be coherent during subsequent processes. This is most frequently achieved by interlacing the individual filaments of the yarn by passing it through an air or steam jet shortly before wind-up. A diagrammatic representation of the drawing process is shown in Fig. 4. The machine draw ratio, which is defined as in eq. 23, is chosen to give a final product with a reasonable extension at break (30 % or less) and initial modulus.