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liming auxiliary agent
The ashing agent is a type of key material used in the ashing process immediately after the water immersion process. The core purpose of this process is to remove the hair, saponify the internal fats in the skin, and further loosen the collagen fibers, laying the foundation for the subsequent tanning process. The main function of the ashing agent is to enhance the efficiency and quality of this process, while reducing the usage and pollution of main chemicals such as sodium sulfide.
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Deliming Agent
The deliming auxiliary agent is a type of key material used in the descaling process immediately following the soaking process. The raw skin after soaking is in a strongly alkaline expanded state. The core objective of the descaling process is to remove the lime, alkali and sulfides within the skin, eliminate the expanded state, and adjust the pH value of the raw skin to a suitable range for subsequent enzymatic softening (usually around 8.0). The main function of the descaling agent is to efficiently and gently achieve this process, laying a foundation for the subsequent softening and tanning.
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Degreasant
The Degreasing agents are a crucial material in the leather preparation process, mainly used to remove the natural oils (such as fats and triglycerides) from the inner and outer layers of raw leather. They can also emulsify and wash away dirt on the leather surface. Since oils can hinder the uniform penetration of subsequent chemicals (such as tanning agents, dyes, and finishing agents), resulting in problems such as oil spots, uneven coloring, and loose surface of the finished leather, the degreasing effect for highly oily skins (such as pigskin and sheepskin) directly affects the softness, fullness, and appearance quality of the finished leather.
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Rewetting agent
The rewetting agent is a key auxiliary material in the wet finishing process of leather tanning. It is mainly used to replenish water to the blue wet leather or the dried leather pieces that have been left for a long time, so as to restore the leather to a soft and pliable state, allowing the fibers to regain their loose and malleable properties. This is necessary for laying a solid foundation for subsequent processes such as re-tanning, dyeing, and oiling. If the re-humidification is insufficient, it will lead to uneven absorption of the chemical materials in the subsequent processes, resulting in problems such as color spots, oil stains, and even cracking.
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Acrylic retanning agent PA
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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Synthetic fatliquor
The Synthetic Fatliquor refers to a type of leather finishing agent that is prepared through chemical synthesis using petroleum or related chemicals as raw materials. Based on their solubility in water, they can be classified into two categories: those that are insoluble in water and those that are in the form of emulsions.
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Synthetic Neatsfoot Oil
The Synthetic Neatsfoot Oil is a leather conditioning agent that is prepared through chemical synthesis using petroleum chemicals as raw materials, and is used as a substitute for natural Neatsfoot Oil. Its most common chemical form is Chlorinated Paraffin, which is a pale yellow oily liquid produced by the reaction of straight-chain alkanes with chlorine under ultraviolet light irradiation, each containing an average of 15 carbon atoms.
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Sulfonated Fatliquor
The Sulfonated fatliquoring agent is the core basic material in the leather fatliquoring system and is also one of the most produced and widely used types of fatliquoring agents. It introduces sulfonic acid groups (-SO₃H) into the lipid molecules through chemical methods, enabling the originally hydrophobic natural or synthetic lipids to acquire excellent water emulsification ability and bonding ability with leather fibers.
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Sulfited fish oil
The Sulfuric acidified fish oil is one of the most typical representative products in leather finishing agents, and is hailed as the “all-purpose finishing agent”. Through chemical modification of natural fish oil and introducing hydrophilic sulfonic acid groups, it transforms from ordinary oil to a high-performance finishing material with excellent emulsion stability and resistance to acids and electrolytes.
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General Purpose Synthetic F...
1: MKL has excellent plumpness and can maintain the firmness of the leather base, suitable for various soft and hard styles, and is a relatively universal emollient agent.
2: MKL can be used together with various emollients. It can be used for firming styles or for cracking patterns styles.
3: MKL has excellent resistance to light, heat, and stability.
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Phospholipid synthesis oil
The Phospholipid synthesis oil, in the field of leather chemical processing, should be more accurately referred to as synthetic phospholipid emulsifier. It is a high-end material in modern leather emulsifiers that combines natural characteristics with synthetic properties. It is produced by chemically modifying or physically blending natural phospholipids (such as soy lecithin) with synthetic components (such as synthetic phosphates, synthetic softeners). Its purpose is to give leather extreme softness, unique velvet texture, and excellent filling effect.
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Replacement-type synthetic ...
The Replacement-type synthetic tanning agents are the core members of the synthetic tanning agent family and are hailed as “complements to plant tanning agents”. Unlike auxiliary-type synthetic tanning agents (which mainly function to disperse and homogenize) that only have dispersing and leveling effects, replacement-type synthetic tanning agents themselves possess significant tanning capabilities and can replace a portion or even most of the plant tanning agents (kautu) for leather tanning. At the same time, they can also give leather better light resistance, softness and filling properties.
