Covers fabric constructions from woven and knitted to nonwovens and composites. Details GSM, cover factor, drape, air permeability, pilling resistance, and handle. Includes test methods and how structure drives performance. This section explains practical decision criteria, typical test methods, and failure modes that matter in real production. Readers get checklists, calculation steps, and case examples connecting specifications to cost, reliability, and compliance. Links map core concepts to upstream inputs and downstream processes so choices remain consistent across sourcing, manufacturing, and end-use performance. Each article includes definitions, diagrams where helpful, and plain-language notes to help newcomers ramp quickly while giving experienced professionals the depth needed to troubleshoot and optimize. Standards references are cited with context, and whenever trade-offs exist, we make them explicit so you can defend decisions.
Industrial Weaving & Tire Cord Engineering
Calculates the 45-degree bias modulus of a woven sailcloth from its warp, fill and shear properties, the diagonal strain and elongation under load, and how much of the bias compliance the shear modulus is responsible for.
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Industrial Weaving & Tire Cord Engineering
Profiles a rapier insertion stroke: available insertion time, peak tape speed, the acceleration the head reaches on a trapezoidal profile, the g-force it represents and the inertial tension spike it puts into the weft.
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Industrial Weaving & Tire Cord Engineering
Converts torsion bar geometry and twist angle into picking torque, stored elastic energy, the projectile velocity it produces after transfer losses, and the peak shear stress the bar carries on every pick.
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Nonwovens & Technical Textiles
Calculates punch density per square centimetre across all needle boards from stroke rate, needle density and web advance, with advance per stroke, engaged barbs at the working penetration depth, and line output in area and mass.
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Advanced Knitting & Hosiery
Estimates the peak load a knitting needle hook carries from running yarn tension and dynamic knock-over loading, compares it against the fatigue-limited allowable rather than the breaking load, and counts the cycles the needle will see in service.
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Filtration, Separation & Gas Dynamics
Predicts flow through gas separation membranes: permeance in GPU from permeability and thickness, driving force, permeate volumetric flow and specific flux, and the permeate purity and enrichment a given selectivity achieves in one stage.
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Nonwovens & Technical Textiles
Models meltblown filter media from fibre diameter, basis weight and thickness: web solidity, mean flow pore size by Wrotnowski’s model, Davies pressure drop at the test face velocity, specific surface area and fibre length per square metre.
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Advanced Knitting & Hosiery
Quantifies the cost of intarsia colour blocking: carrier stroke per block including edge overlap, total carriage travel against panel width, the overtravel that buys nothing, and the yarn consumed in overlaps per panel.
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Medical, Hygiene & Barrier Textiles
Models a hollow fibre dialyser: membrane area from fibre geometry and count, hydraulic permeability from pore radius and wall structure, the ultrafiltration flux at a working transmembrane pressure and the resulting KUf coefficient.
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Filtration, Separation & Gas Dynamics
Optimises pleat packing in HVAC and HEPA filters: media area gained from the pleat ratio, media face velocity, media and inter-pleat channel pressure drops separately, total resistance and the pleat pitch that minimises it.
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