P.E.L.T.
Performance Eco-finishing for Leather and Textiles
Bio-Based Retanning Agent
Problem Statement
Retanning uses synthetic polymers (acrylic, melamine, naphthalene sulfonates) and auxiliary chrome to achieve desired leather fullness, softness, and dyeability. These synthetic retanning agents are derived from fossil feedstocks and contribute to effluent toxicity with poor biodegradability. A bio-based retanning agent could provide equivalent leather quality while enabling cleaner production and compliance with restricted substance lists.
Market Size
$1.4B
Regulatory Drivers
ZDHC Manufacturing Restricted Substances List (MRSL v3.1); EU Ecolabel for leather (Decision 2009/563/EC); Leather Working Group (LWG) environmental audit protocol; OEKO-TEX Standard 100 restricted substances; Italian UNIC sustainability guidelines for tanneries
Enterprise Interest
No enterprise interest recorded yet. Companies can indicate their volume and urgency to help guide research priorities.
Success Criteria
Achieve equivalent or superior softness to acrylic-retanned control (IUP 36), ≥10% improvement in dye exhaustion from bath, maintain tensile and tear strength within 10% of control, and light fastness rating ≥4 on blue wool scale
Equipment Needed
Lab tanning drum (1-3L), thickness gauge, softness tester (IUP 36 method), universal testing machine, spectrophotometer (for dye exhaustion), pH meter, chrome-tanned wet-blue leather, synthetic retanning agents for control comparison, leather dyes and fatliquors
Existing References
Reference list will be published with protocols.
Protected Research Content
This section contains detailed protocols, proposed mechanisms, experiment designs, and safety information.
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