Application issue of anthraquinonoid vat dyes on inherently flame‐resistant fabrics

Abstract

The vat dyeing process of specific fabrics with protective, inherently fire retardant properties that have a high content of aramid fibres in their composition, is presented. The research was performed on fabric samples that differ in raw material composition and aramid content. The samples were dyed in raw form (group 1) as well as after pretreatment with alkaline scouring (group 2).Measured limiting oxygen index (LOI) values showed that the selected fabrics meet the properties of inherently fire retardant fabrics. Dyeing was performed with Indanthren ® Olive Green HB (manufactured by DyStar) vat dye, in exhaustion process, with a bath ratio of 1:30. The dye concentration was 3%, and sodium-hydrosulphite (Na 2 S 2 O 4 ) was used as a reducing agent. The colouristic analyses were performed based on spectrophotometric measurement and results interpretation according to CIELab system. The evaluation of primary tactile properties was performed which show an increase of smoothness and softness after scouring and dyeing. Also, wash fastness as well as light fastness tests have shown satisfactory fastness properties.

ICONTEX and ICONWOOLF 2022 Special Issue

“…Prof. Fazlıhan Yılmaz from Atatürk University, Turkey, and his colleagues 5 . Another study, not with natural dyes, combining dyeing and functionalisation, conducted by Prof. Martinia Glogar and her colleagues from the University of Zagreb, Croatia, concerned colouring inherently flame‐retardant fabric with vat dyes 6 . The research was performed on fabric samples that differ in raw material composition and aramid content.…”