By R Alagirusamy, Apurba Das
Technical yarns are produced for the manufacture of technical textiles. because the variety of technical textiles is swiftly expanding, an figuring out of the yarns on hand and their homes is critical that allows you to meet the necessities of the meant end-use. This publication covers a wide selection of components inside of fabric functions. the 1st a part of the booklet starts through reviewing the advances in yarn creation. The textual content examines advances in cloth yarn spinning, amendment of cloth yarn buildings, the relief of yarn hairiness, and coatings for technical cloth yarns. the second one workforce of chapters describes the diversity of technical yarns for biomedical purposes, comparable to electro-conductive cloth yarns, novel yarns, and plasma taken care of yarns. Technical stitching threads and biodegradable cloth yarns also are mentioned.
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Additional info for Technical Textiles Yarns (Woodhead Publishing Series in Textiles)
Sample text
E. by exposing the yarn in a heated steam chamber. The following equation shows the torque required to produce T turns in unit length [19]: torque = ehC 2 T r where e = shape factor, h = specific shear modulus, C = linear density, r = density and T = twist. With increase in fibre linear density, the torque requirement increases disproportionately. Fibre length Fibre length matters in the case of spun yarn. Use of long fibres in spun yarn reduces hairiness owing to the smaller number of terminating ends in a given section of yarn.
With increase in fibre linear density, the torque requirement increases disproportionately. Fibre length Fibre length matters in the case of spun yarn. Use of long fibres in spun yarn reduces hairiness owing to the smaller number of terminating ends in a given section of yarn. Long fibres need less twist for optimum strength and yarns made from such fibres become soft. In filament yarns all filaments are of infinite length. 9. Natural fibres are in general weaker than synthetic fibres. Usually high modulus and high tenacity fibres are used in those areas where products made from these yarns are to carry loads or high impact forces.
The strips can be varied in width from 1 to 20 mm or greater and in thickness from 20 to 110 mm. This operation is followed by stretching to impart the necessary dimensions and properties to the tape. The cutting width (b) of the primary film (or the distance between the blades to be adjusted) and the resultant tape linear density (T) expected are based on the following formulae: b = w × (stretch factor)½ T = w × d × 10 × r where w = required final tape width (mm), d = tape thickness (mm) and r = tape density (g/cm3).