China Fixing Agent Manufacturers, Suppliers and Factory - Fixing Agent for Industrial

Product Overview

This industrial cationic dye fixing agent is engineered for cellulosic substrates (cotton, viscose, linen) dyed with reactive, direct, and sulfur dyes. Chemical interaction occurs through high-density polyamine cationic charge sites that cross-link with dye anions within the fiber structure, forming insoluble macro-complexes. This mechanism fixes loose dye molecules, preventing migration and bleeding during wet processing and commercial laundering. The product meets stringent international wash fastness criteria while preserving original shade fidelity.

Emerald Blue Fixing Agent
Honefix® F-603
●Emerald Blue Fixing Agent is used for fixing direct dyes, reactive dyes, and sulfur dyes.
●Has particularly good fixing effect on reactive emerald blue...
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Fixing Agent for Reactive Dyes
Honefix® 923
●Formaldehyde-free fixing agent for enhancing the wet fastness of reactive dyes or printing fabric.
●Fixing Agent for Reactive Dyes can obviously improve the washing and...
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Dye Fixing Agent
Honefix® HS-825
●Significantly improves the wet rub fastness of fabrics and effectively solves the problem of color fading caused by wet friction after dyeing.
●Dye Fixing Agent has...
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Key Features

Formaldehyde Emission:

< 10 ppm (compliant with strict ecological textile standards for baby and skin-contact textiles).

Color Preservation:

Delta E (dE) < 0.8 on reactive turquoise and navy benchmarks.

Thermal Stability:

Resists thermal yellowing up to 180 degrees Celsius during stenter setting on white and pastel grounds.

Electrolyte & Hard Water Stability:

Stable in hard water up to 250 mg/L CaCO3 and low-to-moderate bath electrolytes.

Regulatory Standard Coverage:

Full alignment with international chemical safety frameworks, zero restricted hazardous substances, and global export compliance standards.

Product Types / Options

Product Grade	Chemical Base	Formaldehyde Status	Application Method	Key Advantage
FA-201	Polyamine resin	Formaldehyde-free	Exhaust / Jet dyeing	Zero formaldehyde, lowest shade shift on brights
FA-205	Dicyandiamide condensate	Low formaldehyde (<50 ppm)	Continuous Pad-Steam	High cost-efficiency, maximum wet rub fastness
FA-210	Polyquaternary ammonium	Formaldehyde-free	Exhaust / Denim washing	Chlorine bleach resistance, high bath stability

Suitable Fibres & Applications

Substrates: Cotton, viscose, rayon, modal, lyocell, linen, and cotton/polyester blends.

Process Machinery: Jet dyeing machines, package yarn machines, winch washers, pad-dry-cure frames, and continuous pad-steam lines.

End-Use Products: Denim, sports knits, woven apparel, home textiles, and high-durability industrial workwear.

Application & Process Considerations

Exhaust Process (Batch Dyeing):

• Dosage: 1.0% to 3.0% o.w.f. (on weight of fabric).
• Liquor Ratio: 1:8 to 1:12.
• Bath Parameters: pH 4.5 to 5.5 (adjusted with acetic acid/sodium acetate buffer system); temperature 40 to 50 degrees Celsius.
• Time: 20 to 30 minutes following thorough soaping to remove hydrolysate.

Pad Process (Continuous Dyeing):

• Dosage: 15 to 30 g/L.
• Pick-up Rate: 65% to 75%.
• Drying & Curing: Dry at 110 degrees Celsius; cure at 150 degrees Celsius for 60 seconds or run direct stenter setting at standard production speeds.

Manufacturing & Quality Control

Synthesis & Process: Polymerization via aqueous polycondensation with real-time viscosity, refractive index, and monomer conversion monitoring.

Lot QC Testing: Every batch undergoes solid content testing (dryer balance), pH verification, viscosity at 20 degrees Celsius, specific gravity titration, and lab-dip verification on standard reactive-dyed cotton swatches.

Fastness Verification: Minimum Grade 4 wash fastness and Grade 3-4 dry/wet rub fastness.

Environmental & Safety Standards: Zero APEO/NPEO content, zero heavy metals, and complete freedom from restricted aromatic amines.

Packaging & Supply

Packaging Formats:

200 kg high-density polyethylene (HDPE) drums, 1,000 kg IBC totes, or bulk ISO tanks.

Storage Conditions:

Store in sealed original packaging between 5 and 35 degrees Celsius. Keep out of direct sunlight. Protect from freezing.

Shelf Life:

12 months under standard storage conditions.

Transport Classification:

Non-hazardous product under international sea, air, and road freight regulations.

FAQ

Q: What causes shade change during dye fixing, and how does this chemical structure prevent it?

A: Shade shifts happen when cationic polymers form large aggregates with dye molecules, altering the light absorption spectrum. FA-201 uses controlled molecular weight distributions to form uniform micro-complexes within the fiber, holding dE under 0.8 even on sensitive reactive turquoise and navy shades.

Q: Can this product be applied in the same bath with silicone softeners?

A: Most cationic fixing agents precipitate when combined with non-ionic or weak cationic softeners. FA-201 and FA-210 possess high shear and ionic tolerance, allowing single-bath finishing alongside compatible non-ionic or cationic micro-emulsion silicone softeners after lab compatibility testing.

Q: How do formaldehyde-free polyamine agents compare to older melamine-formaldehyde resins?

A: Melamine-formaldehyde resins rely on methylene bridge cross-linking, which releases free formaldehyde during stenter curing. Modern polyamine compounds fix dyes through high-density ionic charge sites, delivering equal or superior washing fastness without toxic emissions or fabric tendering.

Q: What buffer system works best for bath stability?

A: Maintain pH between 4.5 and 5.5 using an acetic acid and sodium acetate buffer system. Avoid mineral acids (like HCl or H2SO4), which can hydrolyze reactive dye bonds, or alkaline buffers, which neutralize the cationic active sites.

Q: How do you remove residual fixing agent buildup from finishing equipment?

A: Clean guide rollers, tenter clips, and dyeing vessels with an aqueous solution of 2% to 3% caustic soda (NaOH) and 1% non-ionic scouring detergent. Circulate or wash at 80 degrees Celsius for 30 minutes to hydrolyze and detach polymer residues.

Q: What technical documentation accompanies commercial orders?

A: Every commercial shipment includes a lot-specific Certificate of Analysis (CoA) detailing active solid content, pH, specific gravity, viscosity, and fastness test ratings, along with a compliant Safety Data Sheet (SDS) and technical datasheet.

As one of the leading fixing agent manufacturers and suppliers in China, we offer a wide range of products with superior quality for industrial. Please rest assured to buy bulk fixing agent made in China here from our factory. Contact us for more details.

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