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How to evaluate needle heat damage in polyester fabrics, compare samples and set practical production specifications.

How to evaluate snag resistance in polyester fabrics, compare samples and set practical production specifications.

How to evaluate spirality after washing in polyester fabrics, compare samples and set practical production specifications.

Xenon-arc sources simulate a broad sunlight-like spectrum when properly filtered, while fluorescent-UV devices emphasize specified ultraviolet bands. Both can accelerate some ageing mechanisms but do not directly convert exposure hours into outdoor service life. Polyester fabric colour, tensile retention, coatings and finish deterioration require separately defined endpoints.

ISO 20743:2021 specifies quantitative methods to assess antibacterial activity of textile products, including treated, coated and integrated systems. It includes absorption, transfer and printing inoculation methods, so the chosen protocol and untreated control strongly influence interpretation. A one-time antibacterial result does not demonstrate durable performance after laundering.

Meltblown processes form fine fibres by attenuating a polymer melt with high-velocity air. In a filtration web, fibre diameter affects surface area and pore structure, but capture efficiency also depends on basis weight, web solidity, media charge, particle size, face velocity and filter assembly. Not every PET grade is suitable for meltblowing.

Sportswear knitted fabrics are repeatedly extended and relaxed during wear. Initial elongation alone does not show fit retention: permanent set, recovery after a defined rest and the change over repeated cycles determine whether knees, elbows and waist panels remain stable.

Water-vapour resistance (Ret) describes opposition to steady-state vapour transport through a material. ISO 11092:2026 specifies sweating guarded-hotplate testing of water-vapour and thermal resistance. Wicking instead measures capillary movement of liquid through a fabric. A polyester top can wick perspiration quickly yet still resist evaporative vapour transport.

Pool disinfection exposes swimwear to active chlorine that can alter some textile colours. ISO 105-E03:2010, confirmed as current in 2026, specifies a controlled laboratory exposure. The chosen concentration and colour-change grading must be recorded before comparing swimwear materials.