Composition for processing by melt-spinning or melt-blowing

Melt-spinnable or melt-blowable compositions comprising:- a) from 55 to 85 parts by weight of a three block copolymer having two endblocks A and a midblock B, A being monoalkenyl arene polymer blocks and B a hydrogenated conjugated diene polymer block, the number average molecular weight of the three block copolymer being 16000 to 175000, the number average molecular weight of A being 4000 to 30000 and the monoalkenyl arene content of the or each three block copolymer being 10 to 50% by weight of the three block copolymer, and from 15 to 45 parts by weight of a two block copolymer C-D, wherein C is a monoalkenyl arene polymer having a number average molecular weight 4000 to 30000, and D is a hydrogenated conjugated diene polymer block having a number average molecular weight 25 to 75% of the number average molecular weight of 15 of the three block copolymer, and wherein the total parts by weight of the three block copolymer and of the two block copolymer equals 100 parts by weight. SE PREPARAN COMPOSICIONES HILABLES O SOPLABLES EN MASA FUNDIDA COMBINANDO: A) 55 A 85 PARTES EN PESO DE UN COPOLIMERO QUE TIENE DOS BLOQUES EXTREMOS A DE POLIMERO DE MONOALQUENIL-ARENO Y UN BLOQUE CENTRAL B DE POLIMERO DE DIENO CONJUGADO HIDROGENADO, SIENDO EL PESO MOLECULAR MEDIO NUMERICO DEL COPOLIMERO DE TRES BLOQUES DE 16.000 A 175.000; Y B) 15 A 45 PARTES EN PESO DE UN COPOLIMERO QUE TIENE UN BLOQUE C DE UN POLIMERO DE MONOALQUENIL-ARENO DE PESO MOLECULAR MEDIO NUMERICO DE 4.000 A 30.000, Y UN BLOQUE D DE POLIMERO DE DIENO CONJUGADO HIDROGENADO, DE PESO MOLECULAR MEDIO NUMERICO IGUAL A 25-75% DEL PESO MOLECULAR MEDIO NUMERICO DEL BLOQUE B. ESTAS COMPOSICIONES SE EMPLEAN PARA FABRICAR FIBRAS.