Condensed Tannin Wood Adhesive (Wattle/Quebracho)
Polyflavonoid condensed tannin extracted from wattle bark or quebracho wood, used as a bio-based binder in exterior-grade plywood and MDF. Cured with hexamethylenetetramine (hexamine) at 180–200°C to form a thermoset phenolic-type network. Provides a formaldehyde-free alternative to conventional UF resin adhesives, meeting E0 and super-E0 emission standards.
Technical Specifications
| Tannin Content | ≥70% (dry basis) |
| Cure Temperature | 180–200°C |
| Hexamine Loading | 5–12 phr |
| Moisture Content | ≤8% |
Applications
- Exterior plywood panel production
- Medium density fiberboard (MDF) binding
- Particleboard and OSB manufacturing
- Finger-jointed structural lumber
- Bio-based laminated veneer lumber (LVL)
Key Features
- Condensed Tannin Wood Adhesive is formaldehyde-free, achieving E0/super-E0 indoor air quality standards
- Bio-based feedstock from renewable plantation bark, reducing carbon footprint vs. petrochemical resins
- Comparable bond strength to phenol-formaldehyde resin under exterior exposure conditions
- Compatible with standard hot-press manufacturing equipment without process modification