Dyeing Chrome‐tanned Leather with the Aid of Ethylene Oxide Levelling Agents

Abstract

A brief description is given of the properties of leather, with particular reference to the application of dyes in presence of non‐ionic, anionic, and cationic auxiliary agents. Fixation of chrome complex, vegetable, and synthetic tanning agents is described. The dyeing of suède leather is considered in detail, and the effect of two “non‐ionic” polyoxvethylene derivatives on the absorption spectra of six sulphonated azo dyes is studied. It is concluded that, to obtain satisfactory dyeings on chrome‐tanned suede leather, the dyes used must have similar affinity, any differences in affinity must be minimised by addition of a suitable auxiliary agent, and the agent must have similar effects on the absorption spectra of all the dyes used.

Fabrication of mechanically resistant superhydrophobic synthetic suede materials

“…[31][32][33][34] However, little attention has been paid to the construction of superhydrophobic synthetic suede which is a classical exible substrate widely used in the wearable eld. [35][36][37][38] Synthetic suede is a kind of synthetic leather material with hydrophilicity because of the superne nylon bers in the substrate, which have an abundance of hydrophilic groups, 39,40 such as -OH, -CO-, and -NHof the macromolecules in nylon, which can form hydrogen bonds with water molecules. Since there is a sea of ne uff on the surface, the synthetic suede products are vulnerable to liquid stain or easily contaminated by blotting.…”