| HS Code | 431734 |
| Product Name | Super Smooth and Soft Silicone Oil RH-NB-8768-8 |
| Appearance | Colorless to slightly yellow transparent liquid |
| Ionic Type | Weak cationic |
| Ph Value | 5.0-7.0 in 1% aqueous solution |
| Solid Content | 30% ± 1% |
| Viscosity | 1000-3000 mPa·s |
| Solubility | Easily soluble in water |
| Suitable Fabrics | Cotton, polyester, nylon and their blends |
| Application Method | Padding or dipping |
| Recommended Dosage Padding | 10-30 g/L |
| Recommended Dosage Dipping | 1-3% o.w.f. |
| Emulsion Stability | Good stability under normal textile processing conditions |
| Storage Conditions | Store in a cool, dry, ventilated place and avoid freezing |
| Shelf Life | 6 months in unopened original packaging |
| Packaging | 120 kg plastic drum or 1000 kg IBC container |
As an accredited Super Smooth and Soft Silicone Oil RH-NB-8768-8 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Super Smooth and Soft Silicone Oil RH-NB-8768-8 is packaged in 200 kg sealed plastic drums for safe industrial transport and storage. |
| Container Loading (20′ FCL) | 20′ FCL containing Super Smooth and Soft Silicone Oil RH-NB-8768-8 in sealed, labeled drums, palletized and secured for export shipment. |
| Shipping | Super Smooth and Soft Silicone Oil RH-NB-8768-8 is shipped in sealed, labeled drums or IBC totes under ambient conditions. Protect containers from moisture, contamination, extreme heat, and direct sunlight. Transport per applicable local/international regulations, with SDS and shipping documents; use standard chemical-handling precautions and prevent leaks or spills during loading and unloading. |
| Storage | Store Super Smooth and Soft Silicone Oil RH-NB-8768-8 in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and strong oxidizers. Keep containers tightly closed, upright, and clearly labeled. Prevent freezing and contamination. Use appropriate secondary containment where required. Do not store with incompatible materials. Emergency equipment and spill kits should be accessible. Follow local regulations and the SDS. |
| Shelf Life | Shelf life is approximately 12 months from production date when stored unopened in a cool, dry, ventilated place, away from sunlight. |
On a continuous stenter frame configured for cotton single jersey and cotton-modal interlock, RH-NB-8768-8 is padded from an aqueous bath adjusted to pH 5.5–6.0 with acetic acid at 0.3–0.8 g/L. The addition rate of 8–15 g/L on the as-supplied product basis is standard for underwear-grade handle on 160–220 g/m² knitted cotton, with a wet pickup of 70–80% controlled by a two-roll padder at 2.5–3.5 bar nip pressure. Drying is arranged in four-field hot-air oven zones: the first two zones at 110–130 °C, the final two zones at 150–160 °C, with total dwell 60–90 s at fabric speeds of 20–35 m/min. The pad bath should be prepared no more than 8 h before exhaustion; if left standing at ambient 25–30 °C in hard water above 150 ppm calcium carbonate, the liquor can develop visible silicone spotting on the fabric selvedge. From a compliance perspective, the formulation is maintained within OEKO-TEX Standard 100 Annex 4 class I limits for infant contact and within the ZDHC MRSL v3.1 finishing-agent constraints for volatile and extractable substances. Finished substrate types include cotton-modal underwear, elastane-containing leggings with 5–8% elastane, pique polo body panels, and interlock babywear. Batch-to-batch variance on production lines typically appears as a difference in wet crock fastness measured by ISO 105-X12:2016; when the addition exceeds 15 g/L or the cure dwell falls below 50 s, the wet crock grade drops below 3, and the unfixed silicone film migrates during storage.
The formulation is incompatible with highly anionic rewetting agents and with residual alkaline scouring chemicals; pad bath pH must be verified at the bath outlet and not only at the mixing tank. When the pH rises above 6.5, the amino-functional film cures incompletely and surface tack appears on the stenter clips, producing fabric crease marks at the pinning points. This operational boundary is especially relevant for cellulosic knits that carry residual alkali from mercerising or bio-polishing stages, where a pre-neutralisation rinse at 40 °C for 10 min is required before the softener bath is applied.
The applicable addition window in industrial garment washing machines of 200–400 kg load capacity is set by the need to avoid film accumulation on pocket lining fabric and the resulting loss of seam slippage resistance. After the final rinse following neutralisation of the enzyme/stone-wash step, RH-NB-8768-8 is introduced at 0.5–2.0% o.w.f. at a bath temperature of 30–40 °C, pH 5.5–6.5, and run for 15–20 min at a low liquor ratio of 1:5–1:8. The garments are then hydroextracted to 50–60% moisture content and tumble-dried at 60–70 °C to avoid yellowing of indigo-dyed cotton. Addition above 2.0% o.w.f. is not standard because the tensile strength retention measured according to ASTM D5034-21 can fall below 85% relative to an untreated control, and tear strength retention measured according to ASTM D1424-21 can show a decline of more than 10%. The compliance anchors for this segment are ZDHC MRSL v3.1, REACH Regulation (EC) No 1907/2006 Annex XVII, and OEKO-TEX Standard 100 class II for outerwear. Terminal garment categories include stone-washed and bleach-discharge jeans, denim jackets, chambray shorts, and heavy-duty cotton workwear. A specific process-critical boundary is residual cellulase: if the preceding acid-cellulase bath is not fully drained and the enzyme carryover exceeds 0.05 mL/L of the finishing bath, the handle on the warp face becomes uneven and the abrasion-mark contrast on thigh and knee areas increases.
The observed failure mode on production machinery is usually not chemical but rheological: when the bath is prepared with hard water above 200 ppm calcium hardness without a chelating agent, the micro-emulsion droplets coalesce on the drum surface during the tumble-dry stage and transfer to rivet areas, producing dark halo marks. This issue is not corrected by longer tumble drying; it requires re-washing with 0.2–0.5 g/L citric acid at 40 °C for 10 min. Processing with residual potassium permanganate neutralisation by-products should be controlled because manganese carryover above 0.5 mg/L oxidises the amino-functional silicone film and induces localised yellowing on undyed weft yarns.
HVLP spray lines for corrected grain cowhide top-coat formulations incorporate RH-NB-8768-8 at 2–6 wt% based on total finish solids, typically after the acrylic or polyurethane binder has been diluted to 10–15% solids. The compound is applied by HVLP spray guns with nozzle diameter 1.0–1.3 mm at air pressure 2.0–2.5 bar, in two to three cross-coats with intermediate drying at 80–100 °C for 2–4 min per coat. Final drying and embossing are carried out at 120–130 °C under a hydraulic embossing press at 80–120 kN/m nip pressure, depending on grain pattern depth. The addition modifies surface slip and rub behaviour; however, above 6 wt% on finish solids the top coat loses inter-coat adhesion and the dry-rub fastness rating can drop below 3 after 100 cycles when assessed by ISO 11640:2018. The compliance framework includes ISO 11640:2018 for colourfastness to rubbing, ISO 11644:2022 for finish adhesion, ISO 5402-1:2022 for flexing endurance, and REACH Annex XVII restrictions for restricted substances in finished leather. Terminal products include automotive seat upholstery, steering-wheel cover leather, shoe upper leather, handbag panels, and upholstery leather for contract furniture.
On a spray line, the practical failure mode is overspray accumulation on the spray booth filters: the product lowers the tack of the waterborne finish and increases filter blockage when booth extraction air speed is below 0.5 m/s. Co-formulation with strongly anionic acrylic penetrators or high-charge wetting agents should be avoided unless a nonionic compatibiliser is pre-dispersed in the water phase, because the amino-functional silicone phase can precipitate as a gel particle at pH below 4.5, producing visible fisheyes in the dried top coat.
A slop padder set to a wet pickup of 65–75% and nip pressure 3.0–4.0 bar is used to apply RH-NB-8768-8 to terry towel cloth at 3–6 g/L in the finishing bath, with pH adjusted to 5.5–6.0 using acetic acid at 0.2–0.5 g/L. The drying arrangement uses a single-pass stenter with three zones at 120–140 °C, and no separate curing zone is required for bath towels at this addition range; residual bound water is removed by the final stenter zone and the fabric is wound at 6–8% moisture. The central process conflict in this application is between surface softness and water absorption: at 3 g/L the sink time measured by AATCC TM79-2018 remains under 10 s, while at 6 g/L the sink time can extend beyond 30 s on a 450 g/m² combed cotton terry. Consequently, bath towels and bathrobes are formulated at 3–5 g/L, while decorative hand towels that are not required to pass high absorbency accept up to 6 g/L. The compliance chain for this segment is OEKO-TEX Standard 100 Annex 4 class I, ISO 105-X12:2016 for wet and dry crocking, and ZDHC MRSL v3.1. Finished article types include ring-spun cotton bath towels, zero-twist cotton bathrobes, jacquard beach towels, and kitchen towels.
On production equipment, the most frequent batch failure appears as a cross-width coefficient of variation in softness above 8% when padder roll crowning is not compensated; this is corrected by reducing the padder pressure at both selvedge positions by 0.3–0.5 bar and increasing centre pressure to maintain an even film distribution. If the stenter speed drops below 15 m/min while the oven temperature remains above 140 °C, the loop pile can develop a stiffened, resin-bonded handle at the pile base that is not reversible by subsequent mechanical softening.
Precision metering pumps deliver RH-NB-8768-8 onto opened polyester staple in the feed chute of a carding line at 0.10–0.30 wt% based on fibre mass, immediately before the fibre enters the carding machine. The target for down-like fibre fill is a uniform oil film that reduces fibre-to-metal friction on the card wire without exceeding the saturation point of the fibre surface; above 0.30 wt% the excess oil transfers to card clothing, condenser rolls and cross-lapper aprons, producing lapping and periodic downtime. The carding line runs at 80–120 m/min, and the subsequent thermal bonding oven operates at 140–170 °C with dwell 40–60 s, which is sufficient to set the web without volatilising the silicone film. The formulation is controlled against OEKO-TEX Standard 100 Annex 4 class I for baby and infant contact, and the treated fibre is also assessed under REACH Regulation (EC) No 1907/2006 for restricted substances. Terminal products from this process are down-alternative pillow battings, duvet fillings, mattress topper padding, and quilted jacket insulation. A production-scale bottleneck specific to this use is the build-up of oligomeric silicone on the thermobonding oven conveyor belt: when the web density exceeds 1,500 g/m² and the oven temperature is above 170 °C, the belt mesh becomes tacky and requires cleaning cycles at 8 h intervals.
The spraying position must be verified against the fibre opening line air velocity. If the mist is drawn into the card exhaust before contacting the fibre, the effective add-on falls below 0.05 wt% and the finished batt exhibits higher surface friction in subsequent quilting operations, measured as an increase in needle penetration force on multi-needle quilting machines. This condition is not corrected by increasing the pump stroke alone; it requires repositioning the spray manifold to within 300–500 mm of the fibre batt entry point and adjusting the spray angle to 15–20° from the horizontal plane.
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The fluid designated as Super Smooth and Soft Silicone Oil RH-NB-8768-8 is a linear polydimethylsiloxane-based liquid supplied for surface slip modification, fiber lubrication, release control, and silicone emulsion preparation. The model number RH-NB-8768-8 identifies a specific grade within the manufacturer’s product portfolio; it is not a crosslinkable silicone gum and it is not a volatile cyclomethicone. Published data for this specific configuration is limited, and therefore the present technical introduction defines the specification framework, application boundaries, and differentiation logic rather than substituting for the lot-specific certificate of analysis. Any acceptance value cited below relates to the product class or to standard test-method practice unless explicitly tied to a supplier-certified lot value.
The primary differentiation claimed for RH-NB-8768-8 is a controlled molecular weight distribution, which reduces the low-molecular-weight siloxane fraction responsible for volatile plate-out on heater surfaces. In high-speed draw-texturing or melt-spinning lines with threadline speeds above 600 m/min, spin-finish droplets are mechanically sheared at the yarn surface and then exposed to heater temperatures in the range of 160 °C to 220 °C. Broad-grade PDMS fluids with high cyclic siloxane content can volatilize under these conditions, forming deposits on ceramic guides and heater tracks. The RH-NB-8768-8 specification should be compared against gel permeation chromatography polydispersity data and gas chromatographic cyclic-siloxane values on the certificate of analysis. A polydispersity index in the range of 1.3 to 1.9 is typical for carefully fractionated silicone oils used in this application, but the supplier must provide the lot-specific value. Compared with amino-functional silicone softeners, RH-NB-8768-8 is non-amino; therefore amine-induced yellowing at curing temperatures above 170 °C is less likely in neat-oil systems, although residual emulsifier chemistry in finished emulsions can dominate yellowing behavior. Compared with reactive silanol-terminated silicone fluids, this product is not expected to undergo room-temperature moisture condensation, so dimensional stability of the applied fluid film is governed by migration and volatility rather than crosslink density. Published data for this specific configuration is limited; the differentiation logic should be verified by comparative Fourier-transform infrared spectroscopy and gel permeation chromatography.
A further distinction from phenyl-modified silicone fluids is that RH-NB-8768-8 does not contain pendant phenyl groups. Consequently, ultraviolet absorbance in the 250 nm to 400 nm wavelength range is typically lower, but refractive index is also lower than that of phenyl-containing analogues. This difference is relevant in optical coatings and textile finishes where low discoloration is required. Phenyl silicones may offer higher thermal stability above 250 °C; RH-NB-8768-8 should not be selected for continuous exposure above that threshold without thermogravimetric analysis under nitrogen, because polydimethylsiloxane backbone cleavage can accelerate in the presence of trace alkali. The absence of amino, phenyl, or polyether functionality also means that the product behaves as a non-reactive plasticizing or slip component rather than as a covalent surface modifier in polar polymer matrices.
The specification framework for RH-NB-8768-8 addresses rheological, thermal, and optical consistency. Typical silicone oil certificates of analysis for this product category report kinematic viscosity by ASTM D445 or ISO 3104, refractive index by ASTM D1218, specific gravity by ASTM D891 or ASTM D4052, flash point by ASTM D92, and pour point by ASTM D97. Volatile content is determined either by supplier oven method or by ASTM D4559; the method revision must be stated on the certificate. Kinematic viscosity is the most decisive property for film thickness and lubricant hydrodynamics. If the lot value falls below 50 cSt at 25 °C, migration risk increases; if it exceeds 1,000 cSt, emulsification difficulty and mixing torque increase. These boundaries are general product-class constraints, not vendor-certified acceptance limits for RH-NB-8768-8.
| Parameter | Standard method | Application relevance |
|---|---|---|
| Kinematic viscosity at 25 °C | ASTM D445 / ISO 3104 | Determines hydrodynamic film thickness and handling viscosity |
| Volatile content | ASTM D4559 / supplier oven method | Controls plate-out, fogging, and migration in high-temperature processing |
| Refractive index | ASTM D1218 | Rapid lot-to-lot consistency check |
| Specific gravity | ASTM D891 / ASTM D4052 | Metering and density correction in bath mixing |
| Flash point | ASTM D92 | Defines upper processing and storage temperature boundary |
| Pour point | ASTM D97 | Low-temperature storage and pumping limit |
The most common processing conflict arises when the neat oil is charged directly into water without pre-dilution. A rotor-stator mixer alone may not generate sufficient shear to produce a stable particle size below 300 nm; the resulting emulsion tends to cream and deposit on pad rollers. A two-stage process is recommended: first, a high-shear dispersion at tip speeds of 10 m/s to 20 m/s; second, pass through a high-pressure homogenizer at 30 bar to 50 bar. Nonionic emulsifiers with an HLB range of 10 to 13 provide acceptable phase inversion behavior for this product class. Demineralized water should have conductivity below 50 µS/cm and total hardness below 20 ppm as CaCO₃; hard water cations destabilize the surfactant film and can cause oil separation. Emulsion pH should be maintained between 5.5 and 7.5. Below pH 5.5, the nonionic surfactant cloud point may shift; above pH 7.5, alkaline hydrolysis of the polydimethylsiloxane backbone can accelerate, particularly in the presence of residual alkali from scoured cotton. In pad-dry-cure finishing, wet pick-up is commonly set between 60% and 80%, drying at 120 °C to 130 °C, and curing at 150 °C to 170 °C for 60 seconds to 120 seconds; these values are starting conditions and require line trial validation because fabric heat history shifts hand performance. Excessive stenter residence time above 180 °C can oxidize nonionic emulsifiers, producing yellowing that is not caused by the silicone fluid itself. The product should not be combined with amine-based additives unless a controlled condensation-cure mechanism is intended; premature crosslinking can alter emulsion viscosity and filtration behavior.
In release-coating applications, RH-NB-8768-8 is not a cured release matrix. It may be used as a migratory slip component in solvent-borne or waterborne release formulations, but the final coating must contain a reactive polysiloxane or acrylic crosslinker to prevent transfer to pressure-sensitive adhesive surfaces. Mayer rod application with wet film thickness between 4 µm and 20 µm is typical for laboratory evaluation; production slot-die coating requires viscosity and surface tension data from the certificate of analysis. If the product is used in elastomer processing as an internal release additive, addition levels between 0.1 wt% and 0.5 wt% are the usual evaluation range. Above 0.5 wt%, reductions in tensile properties can occur in silica-filled compounds, and tensile strength should be tracked following ASTM D412 on each batch. Mixing is performed on a two-roll mill or in an internal mixer with ram pressure and temperature sufficient to disperse the fluid, but uniform dispersion becomes difficult when the addition exceeds 1.0 wt% in high-hardness compounds.
Compliance statements for RH-NB-8768-8 depend on the final formulation and the jurisdiction. The silicone fluid itself may be subject to EU REACH registration under EC No. 1907/2006; absence of substances of very high concern must be confirmed against the current Candidate List. EU RoHS compliance under Directive 2011/65/EU Annex II applies to homogeneous materials in electrical and electronic equipment and is not automatically satisfied by the base fluid alone. If the product is compounded into a lubricant with incidental food contact, the final lubricant must be evaluated under 21 CFR 178.3570; the silicone oil itself is not a direct food additive clearance. For volatile methylsiloxane control in consumer or personal-care formulations, the supplier’s certificate should report cyclic siloxane content and the test method used. Table 2 summarizes the compliance verification matrix.
| Regulatory or standard instrument | Designation / clause | Verification requirement |
|---|---|---|
| EU REACH | EC No. 1907/2006, Annex XVII | Confirm substance registration and SVHC screening against Candidate List |
| EU RoHS | Directive 2011/65/EU, Annex II | Verify restricted substance concentrations in final homogeneous material |
| FDA 21 CFR | 178.3570 | Evaluate final compounded lubricant, not base oil alone |
| Fire and storage | ASTM D92 | Use flash point to define storage temperature limit and ventilation |
| Transport classification | OSHA HCS / CLP | Confirm classification from supplier SDS, not from product name |
Storage should be conducted in sealed carbon steel or high-density polyethylene containers at temperatures between 5 °C and 40 °C. The product should not be exposed to strong acids, strong bases, or aluminum chloride-based Lewis acid catalysts, because depolymerization of polydimethylsiloxane chains can occur under strongly acidic or strongly alkaline conditions. Contact with water during storage can produce haze without immediate performance loss; nevertheless, water ingress should be prevented because it complicates solvent-borne downstream use. If the product is stored below 0 °C, viscosity increases and pumping requires low-shear agitation; heating above 50 °C should be avoided unless the flash point and headspace ventilation are addressed. Avoid mixing with alkoxy-crosslinking silanes unless a deliberate moisture-cure process is designed; unintentional condensation can generate ethanol and increase formulation viscosity. In water-free release formulations, residual moisture in process air above 60% RH can react with crosslinking additives rather than with the silicone oil, but the resulting gel particles can be mistaken for product incompatibility. Published data for this specific configuration is limited; therefore batch-level stability testing under actual plant humidity and temperature is required before full production.
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