Connection between strength of organic complex yarns and reinforced plastics based on them

Conclusions The evaluation of the quality of elementary filaments of poly-p-amidobenzimidazole from the breaking load of a complex yarn 500 mm long should be taken as unfortunate.Testing specimens 30 mm long can be recommended for evaluating the quality of untwisted complex PABI yarns.Increasing the strength of complex yarns 30 mm long leads to a proportional rise in the strength of an organoplastic. In testing specimens of organoplastic 500 mm long, increasing the strength of the complex yarns by 10% leads to only a 3–4% rise in the strength of the organoplastic.The strength of a microplastic is a natural quality criterion for twisted complex yarns.Translated from Khimicheskie Volokna, No. 1, pp. 27–29. January–February, 1989.