ISO 21765 discusses textiles. A textile is a flexible material made by creating an interlocking bundle of yarns or threads, which are produced by spinning raw fibres into long and twisted lengths. ISO 21765 specifies a method for the automatic determination of the deformability of textile fabrics, including continuous-fibre reinforcement textiles. This method is not applicable to resin-impregnated fabrics.
ISO 21765 is suitable for use with fabrics such as woven or knitted fabrics, nonwovens, non-crimp fabrics, fabrics made of glass ravings, or untwisted carbon filament yarns intended for reinforced composite materials. When applying the method to multi-axial non-crimp fabrics, the evaluation of the fibre orientation and gaps only incorporates the uppermost layer. ISO 21765 can be used for fabrics treated with powder binder.
ISO 21765 on textiles is useful for:
Fabrics made from both natural and manufactured fibres have been extensively used for clothing, decoration, and industrial applications. The physical and mechanical properties of these fabrics are affected by the fibre type, yarn construction, and fabric structure, as well as any treatment that may have been applied to the materials. A range of fabric performance parameters is assessed for different end-use applications. ISO 21765 specifies a method by which the textile fabric (including reinforcement textiles) to be examined is forced to be deformed in a defined manner by a rotationally symmetrical deformation body.
The determination of the deformation characteristics is relevant for all production processes in which flat textile fabrics (including reinforcement textiles) are formed into a three-dimensional shape. This example is the case for upholstery applications or the majority of current liquid composite moulding (LCM) processes. Knowledge about the development of deformation effects such as changes in fibre orientation, undulation, and gaps in the textile is crucial for the safe design of processes and components.
The determination of the deformation benefits weight savings, and flexibility of the textile which will improve the quality level of the fibre and it will be a consumer satisfactory product to be used. The best quality level good will increase the demand of the product in the market which will increase the goodwill of the company in the market and the profitability of the company. Using ISO 21765 you can specify a method for the automatic determination of the deformability of textile fabrics, including continuous-fibre reinforcement textiles.
ISO 21765
EN ISO 21765