What are the chemical materials used in lea©£ther processing?

Release time:

2023-04-19

synthetic tanning agent

Early synthetic tanning agents w★♥‍☆ere limited to those♥φ synthetic products whose tanning properties w Ωπere similar to those of n✘↑↑atural vegetable tanning γ♣∏agents. They were used to rσΩ£eplace (or partially replace÷γ) natural vegetable tanning agents, m☆≤ainly synthetic products with aromatic​♠ compounds as raw materials. A★✘ t present, synthetic tanning agent generally ref✘πβers to some organic p♦✘roducts as raw materia₹<$ ls, through chemical reaction s∞λ♣ynthesis, with tanning effect of c↔​omplex organic mixtur€£e.

surface active agent

Surfactant is an importα<ant product of fine chemical industry, a♣∑∑nd its application inδ↕" leather industry has penetrated into the process←♦es of soaking, limingδ'™, softening, tanning, dyeing, fattening, finishi↔α↑δng and filling. Surfactants are aαγβ♥mphiphilic molecules with hydrophilic groups an♦↑δ±d lipophilic groups,γ∑β∑ and the hydrophilic-lipophilic balanc☆↓e value is generally used to rα₽epresent the hydrophδ‌♦δilicity of surfactants, refer®€↔&red to as HLB value.

Leather fatliquor

In the process of lea→¥$ther production, it can'₹₹& play a good lubricatio¥φn effect on the tanned leather fiber, signi₩<$ficantly improve the physical properties of leat☆α↓♦her, and the material w✔₽ith fatliquoring effect on leather is collecti←≥ ÷vely referred to as f&←↕♠atliquoring material or fatliquoring‍✘↔ agent. Leather by adding fat can make it have su€♠​♥itable soft, plump, tough, waterproof, '≤anti-folding, anti-wear and other characteristi$♦≤ cs, improve the physical and mechanical properti‌≈∑es of leather.

Composition of leather fatliqu₩₩±→ors

The fatliquoring of the light lea₽δ€ther production process∞÷ adopts emulsion fatliquoring, so the ♣₩§♠fatliquoring agent used ↕←in the light leather prod∏★♦₩uction process has two→∏∞✔ main components: oil component and ™→emulsifying component. In addition, there are a s♣♥✘mall amount of other ingredi≠φ∞ents, such as fungicides. The oil co♥₽mposition plays an important role in tασhe fatliquoring of the fatliquori✔↓ng agent, and has an impact on th  ∏e physical properties and appearance quality of tε ★​he leather; the emulsifying composi↓€ββtion makes the insoluble oil composition bette©"r dispersed in the water, formin☆✘ ♥g a relatively stable emulsion, wβ←hich promotes the uniform penetration and dis€"←γtribution of the oil composition in th↕∑'£e leather fiber.