| HS Code | 993413 |
| Productname | Amino Silicone Oil Especially for Chemical Fiber RH-NB-8200 |
| Chemicalcomposition | Amino-modified organopolysiloxane |
| Appearance | Colorless to slightly yellow transparent liquid |
| Ionicity | Weak cationic/nonionic |
| Activecontent | 100% |
| Viscosityat25c | 1000-5000 mPa·s |
| Phvalue | 6-8 |
| Solubility | Soluble in organic solvents; dispersible in water after emulsification |
| Emulsifiability | Emulsifiable with suitable nonionic emulsifier |
| Applicationfiber | Chemical fiber and synthetic fiber |
| Mainfunction | Imparts softness, smoothness and slippery hand feel |
| Filmformingproperty | Forms a thin silicone film on fiber surface |
| Thermalstability | Suitable for conventional textile finishing temperatures |
| Storagestability | Stable under sealed, dry and cool storage conditions |
As an accredited Amino Silicone Oil Especially for Chemical Fiber RH-NB-8200 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | RH-NB-8200 amino silicone oil is supplied in sealed 200 kg industrial drums for safe storage and transport. |
| Container Loading (20′ FCL) | A 20′ FCL typically loads 18–20 MT of RH-NB-8200 in 200L drums or IBCs, palletized, shrink-wrapped, and securely strapped for export. |
| Shipping | RH-NB-8200 Amino Silicone Oil is typically shipped in sealed 50 kg drums or 200 kg IBCs/totes as general industrial chemical cargo. Keep containers upright, closed, dry, and protected from sunlight and temperature extremes. Follow the current SDS and local transport regulations for final classification and handling. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, sparks, and open flames. Keep containers tightly closed when not in use to prevent moisture and contamination. Separate from strong acids, alkalis, and oxidizing agents. Avoid freezing and excessive heat. Maintain clear labels and use appropriate secondary containment to prevent spills. |
| Shelf Life | RH-NB-8200 has a shelf life of 12 months from manufacture when kept unopened in a cool, dry, ventilated place. |
In PET staple fibre production, spin finish composition influences fibre-to-metal friction, tow cohesion, and carding waste. For RH-NB-8200 used as an amino silicone component in spin finish concentrates, the typical compounding ratio is 4–12 wt% of total active solids, and the as-applied oil-on-fibre level is maintained at 0.08–0.25% by weight for 1.3–6.7 dtex polyester staple. The finish emulsion, usually at 8–12% total solids, is metered by precision gear pump after spinneret solidification and before the first drawing unit; draw ratios on high-speed staple lines range from 3.0–3.6, crimper speed from 180–240 m/min, and dryer temperature from 80–130°C. Relevant compliance screening includes ZDHC MRSL v3.2, REACH Regulation (EC) No 1907/2006 Annex XVII, and Oeko-Tex Standard 100 Annex 4 for apparel-grade fibre. Terminal products covered by this application include needlepunch nonwoven short-cut fibre, hollow conjugate filling fibre, and carded ring-spun staple yarn. In continuous production, oil-on-fibre above 0.25% transfers to draw rolls and crimper plates, causing lapping and variable crimp frequency; below 0.08%, fibre-to-fibre static friction rises and carding waste increases. The emulsion should be shear-stable for circulation times of at least 30 min, with particle size kept under 0.5 µm at the metering point because larger droplets deposit on finish line filters and reduce dose uniformity.
False-twist texturing of PA66 POY demands a spin finish that maintains stable fibre-to-ceramic disc friction while minimising thermodecomposition residue on primary and secondary heaters. RH-NB-8200 is compounded at 3–8 wt% of the texturizing oil concentrate, with oil-on-yarn set at 0.25–0.55% for 17–78 dtex POY. The finish is applied by metered kiss roll before the draw-texturing zone; line speeds of 600–900 m/min and PA66 heater plate temperatures of 220–240°C require a silicone base with low volatile fraction and high thermal stability. Compliance for yarns entering hosiery, lingerie, and automotive interior fabrics is assessed under REACH Regulation (EC) No 1907/2006 Annex XVII, ZDHC MRSL v3.2, and Oeko-Tex Standard 100 Annex 4. Terminal products are 22–78 dtex PA66 and PA6 textured yarns for sheer hosiery, circular knits, and seat facings. Field data from polyamide texturing lines indicate that oil-on-yarn above 0.55% deposits a tacky film on heater rails, causing tension excursions and broken filaments; oil-on-yarn below 0.25% reduces anti-friction performance and increases snow generation from disc friction. Batch-to-batch emulsion stability is monitored by particle size analysis after 24 h storage at 40°C; separation or creaming in the oil tank requires recirculation before restart.
On pad-dry-cure finishing lines for polyester/nylon wovens, RH-NB-8200 is applied from a pH-controlled microemulsion rather than as a neat oil. The working bath is prepared at 15–40 g/L of a 20–30% active emulsion, resulting in 0.2–1.0% active silicone on fabric weight at 60–80% wet pick-up. The bath pH is buffered to pH 5.0–6.0 with acetic acid; above pH 7.0, the emulsion can cream and produce streak marks on dense polyester taffeta. Drying is run at 110–130°C in the first stenter chambers, and curing follows at 150–170°C for 45–90 s. Compliance is established under ZDHC MRSL v3.2, Oeko-Tex Standard 100 Annex 4, and GB/T 18401-2010 Class B for direct-skin products. The terminal fabric types include ultralight down-proof nylon/polyester shell fabrics, printed interlinings, and warp-knit mesh for athletic apparel. The active add-on is kept at or below 0.5% when the fabric is later laminated or seam-taped, because excess silicone oil reduces adhesive wetting. For down-proof wovens tested under ISO 13936-2:2004, add-on above 0.6% may increase fibre mobility and lower seam slippage resistance; this boundary is an operational limitation rather than a formulation defect.
Wet-spun acrylic tow requires an amino silicone finish after gel stretching to lower fibre-to-fibre static friction and retain crimp amplitude during dryer pass. RH-NB-8200 is formulated at 10–20 wt% of the finish composition, with final finish-on-fibre controlled at 0.15–0.45% of dry mass. The application is made by roller or spray in the finish stand; the tow then enters the crimper and dryer at 120–150°C. Dryer zones above 155°C initiate visible amine oxidation on acrylic, appearing as yellowing on high-bulk knitted panels. Compliance is evaluated under REACH Regulation (EC) No 1907/2006 and Oeko-Tex Standard 100 Annex 4; for EU Ecolabel home textiles, additional screening under Decision (EU) 2014/350/EU may be required. Terminal products are high-bulk acrylic yarns for knitted outerwear, faux fur pile, and staple blankets. The finishing bath must remain cationic-compatible: mixing with anionic antistatic agents precipitates amino silicone droplets, clogging finish filters and producing stop marks. Published data for the exact RH-NB-8200 configuration in acrylic tow finishing is limited; the addition range above reflects production-scale experience with amino silicone oils of similar amine value and viscosity, and must be confirmed against the supplier's certificate of analysis.
When polyester spunbond web is softened after thermal calendering, a post-bonding kiss-roll application of RH-NB-8200 at 2–5% active bath concentration yields 0.15–0.45 wt% oil on web at line speeds of 200–350 m/min. Residual calender heat and a drying hood at 90–120°C remove water; at ambient relative humidity above 60%, infrared pre-drying before the winder is required to prevent blocking on jumbo rolls. Application before calender bonding is avoided because oil on the unbonded web reduces thermal bond strength at the nip. Compliance for automotive nonwoven facings includes REACH Regulation (EC) No 1907/2006, Oeko-Tex Standard 100, and ISO 3795 flammability testing after finishing. Terminal products are spunbond polyester headliner facing, carpet secondary backing, filter support layers, and mattress ticking. The hydrophobic film is not suitable for hygiene acquisition layers; liquid handling must be verified by ISO 9073-13:2006 strike-through testing if the web is considered for coverstock applications.
Post-dyeing lubrication of polyester and nylon sewing threads with RH-NB-8200 reduces needle-generated friction heat and thread breakage in high-speed lockstitch operations. The oil is compounded at 10–30 wt% of a thread finish concentrate, and the total finish-on-thread is set at 0.4–1.2% by weight. Metered lick-roll or slot-die application at winding speeds of 150–300 m/min is followed by inline drying at 80–100°C. Compliance for EU-bound threads is established under REACH Regulation (EC) No 1907/2006 and Oeko-Tex Standard 100 Annex 4; threads specified for personal protective equipment may require additional conformity under EU PPE Regulation (EU) 2016/425. Terminal products are polyester core-spun, texturized, and staple-spun sewing threads for workwear, footwear upper stitching, and automotive seat assembly. Application before package dyeing is not recommended because the hydrophobic silicone film restricts dye liquor penetration and lowers shade reproducibility under ISO 105-C06 wash fastness testing. Finish add-on above 1.2% may cause package glazing and uneven unwinding from the thread spool, while add-on below 0.4% insufficiently reduces needle heat under 6,000–8,000 st/min sewing machine speeds.
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RH-NB-8200 is an amino-functional polydimethylsiloxane fluid supplied as a finish-component silicone for chemical fiber spin finish and overfinish formulation. The product code RH-NB-8200 designates a low-to-medium amine-content silicone oil with active content ≥98.0 w/w% and a viscosity window configured for polyester and polyamide processing. In supplied form, the material is a clear to pale yellow liquid, soluble in aliphatic hydrocarbon carriers and capable of forming translucent micro-emulsions in water when blended with nonionic emulsifiers of HLB 10.5–13.5. Chemical fiber processors use the grade as a softener, surface lubricant, and anti-abrasion component in draw-texturing overfinishes, staple fiber top-coating, and warping size formulations. This document states the specification window, application conditions, compatibility limits, and distinctions that separate RH-NB-8200 from conventional amino silicone oils and unmodified dimethyl silicone fluids.
Table 1 summarizes release specifications and corresponding test methods used at incoming inspection. All viscosity values are reported at 25°C. Storage stability in sealed drums at 5–35°C is specified for 12 months. If viscosity exceeds 3000 mPa·s or if gel particles are observed after warming to 25°C, the material is rejected or filtered through a 10 µm cartridge filter before emulsification.
| Parameter | Specification window | Test method |
|---|---|---|
| Appearance | Clear to pale yellow liquid, free of visible gel | Visual inspection, internal QM-012 |
| Active content | ≥98.0 w/w% | Forced-air oven, 150°C, 2 h, internal method based on ISO 3251:2019 |
| Viscosity | 1000–3000 mPa·s | ASTM D2196-20, Brookfield LV, spindle 3, 12 rpm |
| Amine value | 0.25–0.55 mmol/g | Internal perchloric acid titration in anhydrous acetic acid |
| Refractive index | 1.4040–1.4100 | ASTM D1218-21 |
| Specific gravity | 0.970–1.020 | ASTM D891-18 |
| Flash point, Cleveland open cup | ≥160°C | ASTM D92-18 |
| pH of 1% aqueous dispersion | 6.0–8.0 | ASTM E70-19 |
| Volatile content | ≤2.0 w/w% | Forced-air oven, 150°C, 2 h |
Regulatory documentation supplied with the product lists compliance under EU REACH Regulation (EC) No 1907/2006; no substance of very high concern is present above the 0.1 wt% notification threshold in the supplied fluid.
For polyester drawn textured yarn overfinishing, an aqueous emulsion is prepared at 6–10 wt% active content. The emulsion is buffered to pH 5.5–6.5 using 0.05–0.15 wt% acetic acid 80% before application. In mill trials on a 12-position draw-texturing line operating at 650 m/min, the emulsion was applied by ceramic kiss roll at 0.8–1.2 wt% pickup by yarn mass. Drying was performed on a Brückner stenter at 170°C for 45 s; no creel deposit or intermingling nozzle obstruction was recorded over a 72 h continuous run. The treated yarn exhibited a fiber-to-metal friction coefficient of 0.22–0.28 per ASTM D3108-13 and heat yellowing of ΔYI ≤1.5 after 200°C/60 s per ASTM E313-20. When ambient relative humidity exceeds 60%, predrying at 110°C for 20 min is required before stenter cure to prevent uneven film formation and package sticking.
For high-shear spin finish metering, the emulsion is preferably produced by phase inversion. The silicone oil and a nonionic emulsifier blend are mixed, then deionized water at 20–30°C is added under 200–500 rpm agitation. After phase inversion, the emulsion is diluted to working concentration and adjusted to pH 5.5–6.5. The resulting micro-emulsion has a particle size D50 of 50–100 nm measured by laser diffraction per ISO 13320:2020. In a gear-type finish pump at 1200 rpm and 45°C, no visible creaming or filter blocking occurred over 8 h. Hard water above 200 ppm CaCO₃ should be sequestered before dilution because calcium ions compress the electrical double layer and destabilize the dispersion.
The amino-functional groups are weakly cationic below pH 7.0; direct mixing with anionic surfactants such as sodium alkylbenzenesulfonate or phosphate ester antistats can produce coacervation at charge ratios near 1:1. Coagulated particles in the bath deposit on draw rollers and package dye tubes. Compatibility is maintained when a nonionic protective colloid with HLB 11–13 is used at a ratio of 0.5–1.0 parts per part active silicone and when the anionic component is diluted below 5 g/L before addition.
Thermal exposure above 210°C accelerates amine oxidation and increases yellowness index. The grade is therefore restricted to finishing lines with stenter cure at or below 190°C and residence time below 60 s. In package dyeing processes, the product is not recommended for direct addition to exhausted dye baths at pH above 8.5 because siloxane backbone hydrolysis can occur; published data for this specific configuration is limited. If package dyeing is required, RH-NB-8200 is applied as a post-scour overfinish after dyeing rather than in the dye bath.
Table 2 lists comparative median values obtained under identical finishing conditions on polyester drawn textured yarn. All specimens were padded to 1.0 wt% active pickup and dried at 170°C for 45 s.
| Property | RH-NB-8200 | Conventional amino silicone oil, amine value 0.6–1.0 mmol/g | Unmodified dimethyl silicone fluid |
|---|---|---|---|
| Heat yellowing ΔYI, 200°C/60 s, ASTM E313-20 | ≤1.5 | 2.5–4.0 | ≤0.5 |
| Fiber-to-metal friction, polyester DTY, ASTM D3108-13 | 0.22–0.28 | 0.28–0.35 | 0.35–0.42 |
| Emulsion particle size D50, ISO 13320:2020 | 50–100 nm | 150–300 nm | Not applicable |
| Panel softness rating, 1–5 scale | 3.8–4.2 | 4.3–4.6 | 2.0–2.5 |
| Drop absorption time | 3–6 s | 6–15 s | >60 s |
Relative to a conventional amino silicone oil, RH-NB-8200 shows 1.0–2.5 units lower yellowing after thermal exposure and a 0.06–0.07 reduction in fiber-to-metal friction coefficient. The conventional grade produces a slightly higher panel softness rating, but the difference is within 0.3–0.8 units on the 1–5 scale. This trade-off is intentional for chemical fiber lines where whiteness retention and high-speed frictional control are critical. Against polyether-modified silicones used for hydrophilic finishes, RH-NB-8200 is not fully hydrophilic; drop absorption time is 3–6 s, whereas polyether grades often achieve 1–2 s. RH-NB-8200 provides lower fiber-to-metal friction and better surface smoothness, but it is not selected when high wettability is the primary requirement.
On polyamide 6/6 false-twist texturing, the same emulsion performs best at pH 5.0–6.0; above pH 7.0 the amino groups become less protonated and exhaustion onto the fiber decreases. Application on polypropylene filament is possible only after corona or plasma pretreatment; untreated polypropylene shows insufficient polar anchoring and the silicone film is easily removed by subsequent friction, with published data for this configuration limited. Batch-to-batch viscosity variation in incoming QC is monitored at 25°C with a Brookfield LV spindle 3 at 12 rpm; a coefficient of variation above 3.0% requires re-homogenization or filtration because it can alter emulsion droplet size and downstream pickup consistency.
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