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.
Medical, Hygiene & Barrier Textiles
Compares surgical gown fabric and seam hydrostatic head against a required barrier level, identifies which is the weakest link, and converts the limiting value into pressure units with the margin each element actually holds.
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Nonwovens & Technical Textiles
Checks a filtration geotextile against both governing criteria: the retention ratio of apparent opening size to soil D85, and the permeability ratio against the soil, with permittivity and the flow rate the fabric will pass at the design head.
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Advanced Knitting & Hosiery
Balances the three yarn streams of a fleece or terry circular knit — face, tie and pile — into areal weight per stream, total fabric weight, pile height from the loop length difference and the share of weight the pile carries.
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Filtration, Separation & Gas Dynamics
Predicts electret filter ageing: humidity-adjusted charge decay time constant, charge remaining after storage, filtration efficiency now against as-manufactured, penetration and the storage time at which efficiency falls below a required threshold.
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Advanced Sizing, Slashing & Preparation
Models how warping creel tension builds from package to beam: capstan friction through the guides, drag along the creel length, the tension the furthest end arrives at and the spread against the nearest position.
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Filtration, Separation & Gas Dynamics
Models water removal from fuel through a nonwoven coalescer: separation efficiency and penetration through the bed depth, outlet water concentration, water removed, the bed depth a target outlet requires and droplet residence time.
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Industrial Weaving & Tire Cord Engineering
Checks whether a loom can beat heavy duck: peak sley acceleration and inertial force at the running speed, the total beat-up load per metre of reed width including fabric resistance, and how much of the machine rating that consumes.
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Nonwovens & Technical Textiles
Calculates calender nip dwell time, nip pressure from line load, total nip force and the thermal diffusion depth reached in the dwell, against the melting threshold of a bicomponent sheath polymer.
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Advanced Sizing, Slashing & Preparation
Converts a shop-floor refractometer reading into size liquor solids: temperature-corrected Brix, solids percentage through a size-specific conversion factor, grams of solids per litre, and the error an uncorrected reading would carry.
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Medical, Hygiene & Barrier Textiles
Converts applied bandage tension and layer count into sub-bandage pressure by Laplace’s law, with the shortfall against a target compression class and the number of layers that target actually requires.
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