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New chromium free tanning agent

DEMARTAN PG does not contain free formaldehyde, environmental performance in line with EU standards. DEMARTAN PG is very suitable for pre-tanning and re-tanning of leather requiring soft finished leather.

Keywords: New chromium free tanning agent

Classification:

Synthetic tanning agent

Inquiry

Product parameters

Appearance: White powder

Active ingredient: 70 ± 2%

PH value: 8.5-9.5 (1% aqueous solution)

Solubility: Easily soluble in water

Ionic: Anionic

Product performance

DEMARTAN DAP is a new type of chromium free, metal free, and aldehyde free polymer tanning agent used for tanning all environmentally friendly white wet leather.

The shrinkage temperature of DEMARTAN DAP tanned white wet skin can reach 85 ℃.

DEMARTAN DAP tanned white wet leather has a white, plump, and soft color, and is well compatible with other retanning, filling, and fatliquoring materials.

DEMARTAN D A P is an environmentally friendly tanning agent, and the tanned products comply with EU standards.

Application reference:

1. DEMARTAN DAP White Wet Leather Tanning Reference Dosage: 5-8%

2. DEMARTAN D A P is in an alkaline state (pH: 8.0-9.5) during tanning, and oxalic acid, formic acid, or our company should be used for neutralization

Neutralize organic acids such as DEMARLAL EA/EB to pH 4.2-5.0 for filling and fatliquoring operations.

3. Process examples:

The tanning process of sheep white wet skin

Sheep acid skin - degreasing: liquid ratio of 1.5. 7-8 BE ° salt or sodium formate solution added: 1% B/116:1% for 60 minutes - deacidification: baking soda 2% ±/soda ash 1.5% ± added in batches (to pH 7.5-8.0) - pretanning: add DAP1%, rotate for 2 hours and stop overnight - wash with water. Tanning: Add 0.8% DAP3 and rotate for 1 hour. Add DAP3% and rotate for 6-8 hours. Heat water at 100% internal temperature of 38 ℃ and rotate for 4 hours. Add 0.2% anti mold agent and wash for 2 hours to remove the drum. Let it stand for at least 48 hours.