textile glass fibres are those glass fibres which, in contrast to isolated filaments, can be further processed by the methods used for textiles, e. g. weaving. in din 61850 a distinction is made between glass filaments and glass staple fibres. glass filaments which are drawn from the nozzle in a continuous unlimited length have become more important in plastics reinforcement than glass staple fibres of finite length, and therefore only glass filament products will be considered in this report. glass filaments show a linear relationship between stress and strain up to breaking, with a lower modulus of elasticity than aramid and carbon fibres. so far as strength is concerned, textile glass fibres are not much inferior to other reinforcing fibres, and strength is not a deciding factor in most of the applications. it has to be acknowledged that carbon and aramid fibres have lower densities, and are preferred in applications where lightness is required. 5 refs