THERMOPLASTIC COPOLYAMIDES FOR ASSEMBLY OF TEXTILES
The use, for seamless textile assembly by printing, of a copolyamide including: a) at least one hard segment obtained by polycondensation of at least one of the following: (i) an α,ω-aminocarboxylic acid; (ii) a lactam; and/or (iii) an aliphatic diacid with 6 to 22 carbon atoms and at least one aliphatic diamine with 2 to 14 carbon atoms, and, optionally, b) at least one soft segment obtained by polycondensation of at least one diacid with 4 to 44 carbon atoms with at least one diamine chosen from diamines with 2 to 44 carbon atoms and polyoxyalkylene diamines, the copolyamide having a melting temperature Tm above 80° C. and below 210° C. and a viscosity at 170° C., as measured according to standard ASTM D3236-88 (2009), using a Brookfield rheometer with SC 4-27 spindle, of between 5 Pa·s and 100-200 Pa·s.
1 . The use, for seamless textile assembly by printing, of a copolyamide comprising:
a) at least one hard segment obtained by polycondensation of at least one of the following:
(i) an α,ω-aminocarboxylic acid;
(ii) a lactam; and
(iii) an aliphatic diacid with 6 to 22 carbon atoms and at least one aliphatic diamine with 2 to 14 carbon atoms,
and, optionally,
b) at least one soft segment obtained by polycondensation of at least one diacid with 4 to 44 carbon atoms with at least one diamine chosen from diamines with 2 to 44 carbon atoms and polyoxyalkylene diamines,
said copolyamide having a melting temperature Tm above 80° C. and below 210° C. and a viscosity at 170° C., as measured according to standard ASTM D3236-88 (2009), using a Brookfield rheometer with SC 4-27 spindle, of between 5 Pa·s and 100 Pa·s.
2 . The use as claimed in claim 1 , in which the copolyamide comprises hard segments obtained by polycondensation of caprolactam, lactam 12, 11-aminoundecanoic acid, 1,6-hexamethylenediamine and sebacic acid, 1,10-decamethylenediamine and sebacic acid, 1,10-decamethylenediamine and 1,12-dodecanedioic acid, or a mixture thereof.
3 . The use as claimed in claim 1 , wherein the copolyamide comprises hard segments obtained by polycondensation of caprolactam, 1,6-hexamethylenediamine and adipic acid, or a mixture thereof.
4 . The use as claimed in claim 1 , wherein the copolyamide comprises soft segments obtained by polycondensation of a polyoxyalkylene diamine having a molecular weight of between 60 and 2000 g/mol and of an aliphatic diacid comprising 6 to 36 carbon atoms.
5 . The use as claimed in claim 1 , wherein the copolyamide is chosen from the group consisting of PA 6/11/POP40036, PA 6/11/POP4006, PA 11/POP4006, PA 11/POP40010, PA 6/12/POP40036, PA 6/12/POP4006, PA 12/POP4006 and PA 12/POP40010, PA 6/66/11/12/POP4006, PA 6/612/12/POP40012, PA 6/66/11/12/POP4006, PA 6/11/3636 and PA 11/3636.
6 . The use as claimed in claim 1 , wherein the copolyamide is chosen from PA 6/11/12, PA 6/612/12, PA 6/1012/12 and PA 6/66/11/12.
7 . The use as claimed in claim 1 , wherein the copolyamide has a viscosity, at 170° C., as measured according to standard ASTM D3236-88 (2009), using a Brookfield rheometer with SC 4-27 spindle, of between 8 Pa·s and 60 Pa·s.
8 . The use as claimed in claim 1 , wherein the copolyamide has a melting temperature (Tm) of between 85° C. and 200° C.
9 . The use as claimed in claim 1 , wherein the copolyamide has a glass transition temperature (Tg) below 60° C.
10 . The use as claimed in claim 1 , wherein the copolyamide makes it possible to achieve a peel strength, measured according to the test described in the examples, of at least 8 N/12.5 mm, at 23° C.
11 . A process for manufacturing articles by seamless assembly by printing, wherein the textile substrates are assembled by means of a copolyamide as defined in claim 1 .
12 . The process as claimed in claim 11 , wherein the textile substrates comprise a polyamide.
13 . An article capable of being obtained by the process as claimed in claim 11 .
14 . The article as claimed in claim 13 , wherein the article is a garment or a shoe.