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Quebracho Bark Extract Tannic Extract For Leather Tanning
Product Details:
Payment & Shipping Terms:
| Minimum Order Quantity: | 25kg |
|---|---|
| Price: | 60~70USD |
| Packaging Details: | 25kg/barrel |
| Delivery Time: | 5-10days |
| Payment Terms: | L/C,T/T,Western Union,MoneyGram |
| Supply Ability: | 1000T |
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Detail Information |
Product Description
Quality indicators
| index | unit | Cold melt | Hot melt |
| Tannin | ％ | ≧67 | ≧71 |
| Non-tannin | ％ | ≦30 | ≦26 |
| Insoluble matter | ％ | ≦2.5 | ≦3.5 |
| Water content | ％ | ≦12 | ≦12 |
In the leather tanning process, tannin gum plays a crucial role by stabilizing the collagen fibers in animal hides, transforming them into durable leather. Here's how it works:
Mechanism
Collagen Interaction: Tannins interact with the collagen fibers in the hide. The polyphenolic structure of tannins forms hydrogen bonds and other interactions with the collagen.
Cross-Linking: Tannins create cross-links between collagen fibers, which increases the stability and strength of the leather. This process prevents the hide from decomposing.
Water Resistance: The cross-linking also reduces the hide's water solubility, making the leather more resistant to moisture.
Benefits in Leather Production
Durability: The leather becomes more robust and long-lasting.
Flexibility: Tannin-treated leather retains flexibility, which is essential for various leather products.
Natural Finish: Provides a desirable natural finish and color to the leather.
Process
Preparation: The hides are soaked and cleaned to remove any impurities.
Tanning: The hides are immersed in a tannin-rich solution, allowing the tannins to penetrate and bond with the collagen fibers.
Drying: The treated hides are then dried, completing the tanning process.
Tannin gum, being a natural product, is favored in traditional and environmentally conscious leather tanning methods.