Effect of Chitosan Treatment Methods on the Dyeing of Cotton, Nylon, and PET using Cochineal (II) - Focusing on Color Change by Laundering, Washfastness and Abrasion Fastness -

코치닐 염색(染色)에서 키토산처리(處理) 방법(方法)의 변화(變化)가 면(綿), 나일론, PET의 염색(染色)에 미치는 영향(影響) (II) - 세탁(洗濯)에 의한 색상변화(色相變化), 세탁견뢰도(洗濯堅牢度)와 마찰견뢰도(摩擦堅牢度) 특성(特性)에 관(關)하여 -

In this study, we reviewed the color changes accompanying the laundering, wash fastness, and abrasion fastness of chitosan-treated cochineal-dyed fabrics. The treatment methods were classified into two based on the chitosan treatment: (Method 1): fabric specimens were pre-treated with chitosan prior to the dyeing procedure in salt form. (Method 2): the state of chitosan acid salt formation, coated on the yarn surface, was destroyed and neutralized prior to the dyeing process. The changes in the chitosan treatment methods bear more important meaning in view of the durability. In Method 1, it is highly likely for the chitosan to be detached from the surface by water during laundering since the chitosan is coated as acid salt state. In Method 2, the resistance d the chitosan to water was supposed to revive since the chitosan would return to its original state. Differences in the resistance of the chitosan treatrrent, however, according to the Method 1 and Method 2, fell short of our expectations. In Method 2, the wash fastness did not improve as we expected since the bond between the fibers comprising fabric specimens and the chitosan is not high even if the chitosan itself has high resistance to water.