Patent ID: 11913168
Assignee: BASF SE
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC D | IPC D

Claim 0:
1. A process for producing dyed mixed fibers (D-MF), dyed mixed fiber yarns (D-MY) and/or dyed mixed fiber textile fabrics (D-MT) comprising the following steps a) to d)
a) providing at least one polyester fiber (PF) comprising 80 to 99.5% by weight of at least one terephthalate polyester (A), 0.5 to 20% by weight of at least one aliphatic-aromatic polyester (B) obtained by polymerization of at least the following monomers:
(m1) at least one aliphatic 1,ω-diol,
(m2) at least one aliphatic 1,ω-dicarboxylic acid compound and
(m3) at least one aromatic 1,ω-dicarboxylic acid compound, and
0 to 5% by weight of at least one additive (C),
wherein the % by weight are based in each case on the total weight of components (A), (B) and optionally (C),

b) providing at least one further fiber (FF) different from the at least one polyester fiber (PF),
c) processing the at least one polyester fiber (PF) and the at least one further fiber (FF) to obtain mixed fibers (MF), mixed fiber yarns (MY) and/or mixed fiber textile fabrics (MT), wherein the mixed fibers (MF), the mixed fiber yarns (MY) and the mixed fiber textile fabrics (MT) comprise the at least one polyester fiber (PF) and the at least one further fiber (FF), and
d) contacting the mixed fibers (MF), the mixed fiber yarns (MY) and/or the mixed fiber textile fabrics (MT) simultaneously with at least two different dyes (D1) and (D2) at a temperature TDD<130° C. to obtain dyed mixed fibers (D-MF), dyed mixed fiber yarns (D-MY) and/or dyed mixed fiber textile fabrics (D-MT).