In cellulosic and man-made fiber finishing, "softness" and "smoothness" are hard to achieve together. General dimethyl silicone gives basic lubrication but lacks polar amino groups, so retention on cotton, viscose, and lyocell is limited and hand decays after washing. Medium-low amine diamino oils penetrate well but hit a "softness ceiling" on high-count dense or heavy knits, failing to deliver both excellent softness and slip. High-viscosity high-amine oils feel soft but emulsify slowly, penetrate poorly on thin cloth, and may stick on napping rolls. With woven, knitted, and nonwoven lines demanding "excellent softness and smoothness, elastic crease recovery, improved tensile and tear strength", finding a "high-amine, medium-low viscosity, diamino, easily microemulsifiable, low-dosage high-efficiency" base oil has become a key formulation issue. Addressing this, Anhui IOTA Silicone Oil Co., Ltd. officially launches SUPERSOFT IOTA C910. Characterized by "high-amine, medium-low viscosity diamino-functionalized polydimethylsiloxane; typical appearance clear to slightly hazy liquid, colorless or pale yellow, slight amine odor; viscosity about 1500 mm²/s at 25℃, flash point 104℃, active content 100%, amine value 0.8%", backed by "high-amine dual-amino multi-point anchoring + medium-low viscosity spreading + microemulsion compatibility + low-dosage efficiency", it serves as the "soft-fluff choice" for cellulosic/man-made softening and smoothness, achieving the leap from "medium-low amine insufficient softness" to "high-amine diamino excellent softness and smoothness". System Positioning: High-Amine Diamino Base vs. Medium-Low Amine/High-Viscosity Soft Oils C910 belongs to high-amine diamino-functional polydimethylsiloxane crude oil, distinct from medium-low amine C803 and single-amino soft oils. The diamino structure provides two amino interaction sites along the chain for stronger hydrogen bonding and dipole orientation on cellulose hydroxyls and man-made fiber polar surfaces; the high amine value of 0.8% greatly increases polar density, synchronously improving fiber-surface adsorption, film continuity, and hand fullness; medium-low viscosity around 1500 mm²/s balances emulsification, dispersion, and yarn-gap penetration, avoiding slow spreading of very high-viscosity oils in microemulsion and pad-dye/exhaust applications. It is developed for amino silicone emulsion/microemulsion formulations; 0.3% to 1% silicone content imparts excellent softness and smoothness to fabrics. Molecular Architecture: High-Amine Diamino Sites + PDMS Backbone + Medium-Low Viscosity Film The core design of C910 comes from high-amine diamino-modified polysiloxane structure:

• High Amine 0.8% Diamino: Amino groups on the chain can be protonated and orientate with anionic/polar fiber sites; dual sites plus high nitrogen density improve retention and film continuity. Strong polarity contributes excellent softness, lubrication, and elastic recovery potential.
• PDMS Backbone: The Si-O-Si backbone is flexible and methyl groups give low surface energy, forming a continuous slip film on fibers to reduce static friction and improve smoothness and lively hand.
• Medium-Low About 1500 mm²/s: Under shear it is easily made into microemulsion with emulsifiers such as C13(EO)6, penetrating cellulosic/man-made yarn gaps uniformly; compared with higher-viscosity oils it is more suitable for uniform pick-up in pad and exhaust, reducing local oil buildup.

Performance Leap: From "Insufficient Softness" to "Excellent Softness and Smoothness" Introducing C910 microemulsion/emulsion at 0.3%–1% silicone content brings the following benefits:

• Excellent Softness and Smoothness: High-amine diamino adsorption plus siloxane lubrication gives cellulosic and man-made woven/knit a soft yet smooth hand — soft without greasiness, smooth without oiliness.
• Elasticity and Crease Recovery: The silicone film supplements elasticity and reduces crease permanent set, improving crease-recovery angle and supporting wash-and-wear/ machine-wash performance.
• Improved Tensile and Tear Strength: Film lubrication allows interfiber sliding and distributes external force, improving fabric tensile and tear strength; especially useful as compensation for nonwoven and sanding-damaged cloth.
• Low-Dosage High Efficiency: 0.3%–1% silicone content achieves target handfeel, reducing auxiliary cost and wastewater silicone load.
• Pad and Exhaust Universal: Suitable for both pad and exhaust application, offering high formulation flexibility.

Application Penetration: From Man-Made Knit to Nonwoven C910 covers multiple cellulosic/man-made scenarios:

• Cellulosic Woven/Knit: Cotton, viscose, modal, lyocell for excellent soft-smooth finishing, balancing drape and garment hand.
• Man-Made Nonwoven: Spunlace and thermal-bond nonwovens for soft lubrication and uniform hand.
• Pad Lines: Continuous padder with large-bath diluted working liquor for uniform penetration at low silicone content.
• Exhaust Lines: Rope/overflow dyeing machine same-bath or post-finishing with C910 microemulsion; 0.3%–1% silicone content gives soft-fluff.
• Auxiliary Mother Stock: Emulsified by the typical microemulsion formula, then tiered into ultra-soft, high-elastic, and strength-improving compounds.

IOTA Technical Guide: Typical Microemulsion, Weak-Acid Dilution

• Typical microemulsion formula (typical, not mandatory): SUPERSOFT IOTA C910 20%, glacial acetic acid 0.22%, surfactant C13(EO)6 10%, sodium acetate 0.2%, 1,2-propanediol 1%, deionized water to 100.
• Process: In a vessel, add water, acetic acid, sodium acetate, and emulsifier; stir evenly. Slowly add C910 under continuous stirring until complete. Add 1,2-propanediol and continue stirring. Filter the emulsion to remove impurities and undissolved gel particles.
• Application Note: First dilute with water to silicone content below 5%, then adjust diluted liquor pH=4–6 before pad or exhaust. For high-amine diamino microemulsion, start with 20% oil phase for trial, then back-calculate working-liquor concentration by 0.3%–1% silicone content; do not apply other grades' dosages to C910.
• ⚠️ Taboo: For light/bleached cloth, run pre-setting and post-setting Δb/ΔE trials; high amine 0.8% carries higher yellowing risk from heat/light than medium-low amine grades, requiring low-temperature setting or low-yellow compounding. Acetic acid and sodium acetate form a buffer; avoid direct mixing with strong alkali. For high-viscosity compounds or hard water, test emulsion particle size and centrifugal stability. Reseal after use to prevent amine-odor volatilization and moisture uptake. Filter out gel particles before use. Strictly control diluted pH 4–6 to prevent amino precipitation or demulsification.
• Storage: 200kg drum (800kg per pallet), plastic drum; store in original closed containers at 2–30℃; standard shelf life 12 months from production date, beyond which follow manufacturer re-inspection. Unlike 209 series 0–40℃/18 months, C910 follows this temperature range and period.

Industry Insight: The value of high-amine diamino silicone oil lies in "dual sites for retention, high amine for hand fullness, medium-low viscosity for penetration/microemulsion, weak-acid buffer for yellowing control". C910, with "diamino PDMS, about 1500 mm²/s, amine value 0.8%, 100% active, flash point 104℃, typical microemulsion C13/acetic acid/sodium acetate/propanediol", fills the soft-fluff base link of domestic high-amine diamino crude oil in cellulosic/man-made excellent softness, smoothness, elasticity, and strength. For auxiliary manufacturers, it can serve as a microemulsion mother stock, then be subdivided by slip, whiteness, and elasticity, upgrading the soft-fluff premium of man-made and cellulosic fabrics along the path of "general PDMS → medium-low amine diamino → high-amine diamino ultra-soft oil".