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Formaldehyde-free melamine
The most prominent feature of the formaldehyde-free melamine tanning agent is its selectivity for filling.
It can preferentially fill the soft areas such as the edges and abdomen of the leather, effectively solving the problem of loose surface, while maintaining the natural grain lines in the firm areas such as the back spine line.
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Amino resin
The Amino resin tanning agent is the “master of shaping” in the leather re-tanning process. Through excellent selective filling, it precisely acts on the soft areas such as the edges and seams of the leather, effectively reducing part differences and solving the problem of loose surface. At the same time, it gives the leather a unique feel of fullness, firmness and elasticity. If acrylic tanning agent is responsible for “filling and softening”, synthetic tanning agent is responsible for “comprehensive adjustment”, then the specialty of amino resin tanning agent is “firm shaping and selective filling”.
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synthetic tanning agent
The Syntan is the most widely used and diverse type of material in leather chemistry. It can be regarded as a kind of tanning agent “customized” through chemical methods. It mimics the structure of plant tanning agents, but has more flexible and controllable properties. It is the core means for regulating the feel, filling property, dyeing performance and cost reduction of leather in modern leather manufacturing.
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Neutralisation Tannin
The Neutralizing tannin is a specific synthetic tanning agent used in the leather re-tanning process. It is mainly applied in the neutralization process of chrome-tanned leather. Its core function is not simply to neutralize the alkali, but to moderately adjust the pH value of the leather blank through its buffering and restraining properties, while loosening the fibers and firming the surface texture, thus creating the best conditions for subsequent re-tanning, dyeing, and oiling.
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Acrylic retanning agent PB
The Acrylic tanning agent is one of the most crucial materials in the leather re-tanning process. It mainly addresses the unevenness of leather by selectively filling the loose areas of the leather (such as the abdominal and flank regions), thereby improving the quality of the leather in terms of fullness, softness, and light resistance. It is an indispensable material in the production of modern high-quality leather, including sofa leather, shoe upper leather, and clothing leather.
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Soaking auxiliary agents
Soaking aid are key materials in the leather production preparation stage. They are mainly used to quickly and evenly restore raw hides (especially salted wet hides or dry hides) to the fresh hide state, while cleaning off dirt and some oils on the hides, laying a solid foundation for subsequent processing.
