scope:

Establishes a method of designation for para-aramid fibre filament yarns which may be used as the basis for specifications. This designations system is for para-aramid fibre filament yarns used for the reinforcement of polymer composites to reinforce in mechanical properties. It does not apply to discontinuous fibres and para-aramid fibre products made in the form of staple yarns, woven fabrics, braids, knits, mats, etc. It is not intended to imply that the fibres having the same designation give the same performances. This standard does not provide engineering data, performance data or data on processing conditions which may be required to specify a fibre for a particular application and/or method of processing.