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Tannic Acid Extraction Oak Tannic Extract Tannin In Plants
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 |
Tannin types: Tannins are divided into two categories: condensation and hydrolysis. They have different roles and effects in the tanning process.
Tanning characteristics: Tannin tanned leather has good filling and molding properties, which are difficult to replace by other tanning agents.
Tannin modification: Tannin can be modified by sodium sulfite modification, oxidation modification, etc. to improve its water solubility, lighten color, reduce viscosity, and enhance permeability.
Vegetable tanned leather characteristics: Leather tanned mainly with tannins is called vegetable tanned leather. It is full and tight inside, easy to mold, and has low ductility. It is the basic method for making heavy leather such as sole leather and luggage leather.
Combined tanning: Tannin can be used in combination with metal salts such as aluminum salts to increase the shrinkage temperature and wet heat stability of leather, reduce the amount of tannin, weaken the vegetable tanning feeling of the finished leather, and improve softness and extensibility.
Retanning application: Tannin retanning can give leather special properties, such as improving the fullness of finished leather, inhibiting the formation of hexavalent chromium, etc., to meet the personalized requirements of different types of leather
.
Environmental protection trend: With the improvement of environmental protection requirements, tannin extract, as a green and degradable vegetable tanning agent, is increasingly valued
.
Bioenzyme catalysis: Using bioenzymes such as laccase, polyphenol oxidase, and horseradish peroxidase to catalyze the oxidation of tannin extract can increase the covalent cross-linking degree between tannin extract and rawhide collagen fiber network, and improve the moisture and heat resistance and physical and mechanical properties of finished leather
.
Tannin extract dyeing: Tannin extract has the characteristics of direct dyes and can be used for leather dyeing, providing a green and environmentally friendly dyeing solution