Abstract: Described are a hybrid yarn consisting of two groups of filaments, one group consisting of one or more varieties of reinforcing filaments (filaments (A)) and the other group consisting of one or more varieties of matrix filaments (filaments (B)), whereinthe filaments (A) of the first group have an initial modulus of above 600 cN/tex, preferably of 800 to 25,000 cN/tex, in particular of 2,000 to 20,000 cN/tex,a tenacity of above 60 cN/tex, preferably of 80 to 220 cN/tex, in particular of 100 to 200 cN/tex, and a breaking extension of 0.01 to 20%, preferably of 0.1 to 7.0%, in particular of 1.0 to 5.0%,the filaments (B) of the second group are thermoplastic filaments which have a melting point which is at least 10.degree. C., preferably 20.degree. to 100.degree. C., in particular 30.degree. to 70.degree. C.

Abstract: Described is a hybrid yarn consisting of at least two varieties of filaments, at least one variety (A) having a lower heat shrinkage and at least one variety (B) a higher heat shrinkage than the rest of the filaments of the hybrid yarn, whereinthe first variety (A) of filaments has a dry heat shrinkage maximum of below 7.5%,the second variety (B) of filaments has a dry heat shrinkage maximum of above 10%, andits dry heat shrinkage tension maximum is so large that the total shrinkage force of the proportion of the second variety of filaments is sufficient to force the lower-shrinking filaments present to undergo crimping,the optionally present, further filament varieties (C) have dry heat shrinkage maxima within the range from 2 to 200%and at least one of the filament varieties (B) and/or (C) is a thermoplastic filament whose melting point is at least 10.degree. C., preferably 20.degree. to 100.degree. C., in particular 30.degree. to 70.degree. C.