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Bayberry Extract Vegetable Tannins Leather Tanning Chemicals
Product Details:
Payment & Shipping Terms:
| Minimum Order Quantity: | 25kg |
|---|---|
| Price: | 60~70USD |
| Packaging Details: | 25kg/barrel |
| Delivery Time: | 7-10days |
| 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 |
Quebracho Tannin as a Curing Accelerator in Phenol-Formaldehyde Resin Adhesives:
Role of Quebracho Tannin as a Curing Accelerator:
Quebracho tannin is widely employed as a curing accelerator in phenol-formaldehyde resin adhesives. Its role includes expediting the curing process of the adhesive, thereby enhancing its performance and durability.
Principle of Quebracho Tannin:
As a natural tree gum, Quebracho tannin possesses properties that aid in promoting the curing of phenol-formaldehyde resins. It can undergo cross-linking reactions with the resins during chemical processes, accelerating the curing process.
Curing Process of Phenol-Formaldehyde Resin Adhesives:
During the preparation of adhesives, Quebracho tannin is mixed with phenol-formaldehyde resins as a curing accelerator. Through a series of chemical reactions, it promotes curing, leading to the formation of a strong adhesive bond with enhanced adhesive strength and durability.