D - Textiles – Paper – 02 – G
Patent
D - Textiles, Paper
02
G
D02G 3/04 (2006.01) B29C 70/22 (2006.01) D02G 3/40 (2006.01)
Patent
CA 2165402
Described is a hybrid yarn consisting of at least two varieties of fila- ments, 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, wherein - the first variety (A) of filaments has a dry heat shrinkage maxi- mum of below 7.5%, - the second variety (B) of filaments has a dry heat shrinkage maximum of above 10%, and - its dry heat shrinkage tension maximum is so large that the total shrinkage force of the proportion of the second variety of fila- ments 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°C, preferably 20 to 100°C, in particular 30 to 70°C, below the melting point of the lower-shrinking component of the hybrid yarn. Also described are a process for producing the hybrid yarn and the use of the hybrid yarn for producing permanent deformation capable textile sheet materials and fiber reinforced shaped articles.
Bak Henning
Knudsen Hans
Lichscheidt Bent
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Hoechst Aktiengesellschaft
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