| HS Code | 590869 |
| Product Name | Cool Feeling Stiff Finishing Agent RH-NB-633A |
| Product Model | RH-NB-633A |
| Appearance | Milky white to light yellow liquid |
| Ionicity | Weak cationic/nonionic |
| Ph Value | 5.0-7.0 (1% aqueous solution) |
| Solid Content | 30% ± 1% |
| Solubility | Easily dispersible or soluble in water |
| Main Function | Imparts cool feeling and stiff finishing effect |
| Applicable Fibers | Cotton, polyester, nylon and their blends |
| Application Process | Padding or dipping |
| Recommended Dosage | 20-60 g/L for padding |
| Compatibility | Compatible with most nonionic and weak cationic finishing agents; avoid strong anionic substances |
| Storage Conditions | Store in a cool, dry, ventilated place; avoid freezing and direct sunlight |
| Shelf Life | 6 months in unopened original packaging |
| Packaging | 50 kg or 125 kg plastic drum |
As an accredited Cool Feeling Stiff Finishing Agent RH-NB-633A factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Cool Feeling Stiff Finishing Agent RH-NB-633A is supplied in 120 kg sealed plastic drums for industrial handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL loading of Cool Feeling Stiff Finishing Agent RH-NB-633A in drums/pallets, securely stowed for safe and stable ocean transport. |
| Shipping | Cool Feeling Stiff Finishing Agent RH-NB-633A is typically shipped in sealed polyethylene drums or IBC totes. Keep containers closed, store in a cool, dry, ventilated area, and protect from freezing and direct sunlight. Follow the SDS and local transport regulations; classify according to supplier-provided documentation. |
| Storage | Store in original, tightly closed containers in a cool, dry, well-ventilated warehouse. Keep away from direct sunlight, rain, heat, sparks, and ignition sources. Do not freeze. Separate from oxidizers, acids, and alkalis. Keep containers upright, clearly labeled, and follow the SDS and local regulations. |
| Shelf Life | Shelf life is 6 months when stored sealed in original packaging in a cool, dry, ventilated place, avoiding sunlight. |
On compact-spun cotton poplin intended as summer shirting, the agent is introduced into the pad bath after desizing, scouring, bleaching, and mercerizing. Mill trials on a Kusters padder equipped with S-roller deflection have shown that a starting concentration of 30–60 g/L is workable when wet pickup is held at 65–75%. Bath pH is adjusted to 5.0–6.0 with acetic acid; dropping below 4.5 may destabilize the dispersion and produce roller deposits. Brookfield LV viscosity at 25°C using spindle 2 at 60 rpm should remain below 500 mPa·s; an increase above 30% after 24 h standing indicates harmful interaction with cationic softeners or residual hydrogen peroxide. Drying on an 8-chamber stenter at 120–140°C with 60–120 s residence time, followed by curing at 150°C for 60–90 s, yields a firm, low-tack surface. The cooling sensation is evaluated by contacted thermal effusivity using a KES-F7 Thermo Labo II after conditioning at 20°C and 65% RH; no ISO test method currently defines a minimum Qmax, so brand protocols set seasonal acceptance windows. Laundering durability is checked after 5 cycles under ISO 6330:2021 procedure 4N at 40°C with line drying. Stiffness change is quantified by bending length under ASTM D1388-18. Tensile strength retention is measured per EN ISO 13934-1:2013; a loss greater than 25% relative to untreated fabric indicates over-curing or excessive film bridging. Compatibility must be checked when the mill adds hydrophilic silicone softeners. Even 5 g/L of an amino-functional silicone can re-wet the film and suppress stiffness. Published data for this specific configuration is limited; jar tests at 1:5 dilution and 45°C for 6 h are used before bulk dosing. Finished shirting typically moves into long-sleeved button-down styles where collar and cuff stiffness are visually graded under D65 illumination.
A production issue on 50-denier polyester voile is the competition between film modulus and handle. Foam finishing or low-add-on padding at 30–40% wet pickup is preferred; a starting concentration of 20–40 g/L applied through a Gaston Systems CFS applicator keeps the film on the yarn surface without filling the interstices. Foam blow ratio is controlled between 1:4 and 1:8 to prevent drainage marks. Drying at 110–130°C for 30–45 s is followed by pin stenter heat setting at 170°C for 30 s to minimize post-laundering cracks. Drapery constructed from polyester voile used in public spaces falls under NFPA 701-2023 Method 1 or 16 CFR 1610, depending on end-use classification. Vertical flame behavior is evaluated by ASTM D6413-22; char length after treatment must not exceed the untreated control by more than 10%. On dark shades, surface residue after 1 cycle of ISO 6330:2021 washing should be inspected under D65 lighting. Crocking per AATCC TM8-2021e2 must remain grade 4 dry and grade 3 wet. Seam tensile and tear are not primary risks at this addition level, but stiffness retention after 10 cycles of AATCC TM61-2A is a more sensitive indicator than single-cycle testing. Overdrying above 180°C embrittles the polymer and produces dusting during cutting. Rod-pocket curtains and box-pleat valances are the main conversion outputs. Avoid one-bath addition of high-density polyethylene wax above 3 g/L because film whitening occurs; published data for this specific configuration is limited.
In cut-and-sew bedding plants running 300 cm-wide cotton percale, mill trials start with RH-NB-633A at 15–30 g/L, a modified DMDHEU resin at 40–60 g/L, and magnesium chloride catalyst at 8–12 g/L. Pad application at 70% wet pickup is followed by drying at 110°C to 8% residual moisture and curing at 160°C for 60–90 s. Formaldehyde release is measured by ISO 14184-1:2011; adult bedding must stay below 75 ppm, and children’s items below 16 ppm under relevant national regulations. Tear strength measured by ASTM D1424-09(2019) commonly decreases after crosslinking. If tear strength falls below 600 cN for 80 g/m² percale, reduce RH-NB-633A by 5 g/L before reducing resin because the stiffener film can amplify brittleness at fiber crossover points. Wrinkle recovery angle measured by AATCC TM128 after 5 home-laundering cycles under ISO 6330:2021 procedure 4N is a more meaningful baseline than unwashed smoothness; a gain of 15–20 degrees is a typical starting baseline, but published data for this specific configuration is limited. Surface smoothness is graded by AATCC TM124 after tumble drying. The process window is narrow: cure below 150°C leaves unreacted resin and reduces washfastness; cure above 170°C accelerates strength loss and yellowing on white goods. Bath pH drift from the catalyst must be corrected by a slow acetic acid feed because pH above 6.5 retards etherification and pH below 4.0 promotes cellulose hydrolysis. Fitted sheets, pillowcases, and top sheets are the terminal stock-keeping units.
| Application | Substrate | Concentration (g/L) | Wet pickup (%) | Drying / curing condition | Critical test |
|---|---|---|---|---|---|
| Summer shirting | Compact cotton poplin | 30–60 | 65–75 | 150°C for 60–90 s | EN ISO 13934-1:2013 |
| Sheer curtain | 50-denier polyester voile | 20–40 | 30–40 | 170°C for 30 s | ASTM D6413-22 |
| Bed linen | 80 g/m² cotton percale with DMDHEU | 15–30 | 70 | 160°C for 60–90 s | ASTM D1424-09(2019) |
| Interlining | 37 g/m² viscose/nylon | 25–50 | 30–45 | 120°C cylinder drying | ISO 3175-2:2019 |
| Headwear brim | Pigmented cotton twill | 60–120 | 50–60 | 90°C pre-dry; 140°C for 60 s | ASTM D4032-08(2016) |
| Denim garment | Indigo denim after stone wash | 5–15 | Exhaustion | 50°C tumble to 80% dryness | AATCC TM135 |
Woven viscose/nylon interlining at 37 g/m² is processed through a lick-roll nip at 30–45% wet pickup using 25–50 g/L of RH-NB-633A. Cylinder drying at 120°C followed by a cooling pass reduces blocking during roll-up. The treated interlining is tested after 3 cycles of perchloroethylene dry cleaning under ISO 3175-2:2019; width shrinkage must remain below 2%, and bending stiffness change by ASTM D4032-08(2016) must stay within ±15% of the pre-cleaned value. Fusible coating compatibility is critical. When the interlining is later coated with a polyamide hot-melt, the stiffener film must not inhibit adhesive penetration below the surface. Poor penetration appears as peel delamination under a tensile peel test; coating plants often use a 180° peel fixture at 100 mm/min to compare fused laminate bond strength. The treated fabric must comply with OEKO-TEX Standard 100 Annex 4 for product class II, with no detectable arylamines above 20 mg/kg in the final dyed interlining; relevant azo testing is conducted per EN ISO 14362-1:2017. Suit jacket fronts, waistband linings, and chest canvas stabilization are terminal uses. The agent should not be combined with free-formaldehyde polyamide crosslinkers above the 75 ppm release limit for adult articles; higher free formaldehyde produces embrittlement after repeated hot pressing at 150°C.
Cap brims made from pigmented cotton twill present a narrow processing window because the agent film must be distributed uniformly through the substrate rather than concentrated at surface evaporation fronts. Padding at 60–120 g/L and 50–60% wet pickup is used, with a first-stage dryer set at 90°C and air velocity below 3 m/s to prevent surface skin formation. Production experience on air-float dryers indicates that visible specking becomes difficult to control when the first-zone temperature exceeds 110°C. The second-stage cure at 140°C for 60 s develops full bending resistance. Stiffness is quantified by ASTM D4032-08(2016) circular bend procedure; because brim substrates are usually cut on the bias, both machine-direction and cross-direction specimens are measured. For children’s caps sold in the United States, total lead in the accessible textile assembly must not exceed 90 ppm after acid extraction per CPSC-CH-E1002-08.3. Flammability testing under 16 CFR 1610 is required for the finished cap. Crocking fastness per AATCC TM8-2021e2 must remain grade 3.5 wet for dark colors, especially where starch-based stiffeners are replaced by RH-NB-633A. Repeated flexing under a 10,000-cycle bending fatigue test can expose internal fiber breakage not visible in static stiffness tests; published data for this specific configuration is limited. Structured baseball caps and peaked military caps are the primary end products.
Denim garment processing introduces the agent after stone wash and neutralization, when residual indigo redeposition is controlled. A final rinse application at 5–15 g/L is carried out in a front-loading garment washer at 25–35°C for 10 min; the bath is drained, and the garments are tumble-dried at 50°C to 80% dryness before air suspension. This low-temperature route avoids the thermal softening that occurs when rigid denim is pressed above 120°C. Dimensional stability is checked according to AATCC TM135 after 3 home-laundering cycles; acceptable width shrinkage is usually below 3% for rigid styles. Tensile and tear retention are measured by EN ISO 13934-1:2013 and ASTM D1424-09(2019) to confirm that the film does not reduce tear strength by more than 15%. Color fastness to light is tested under ISO 105-B02:2014; rigid denim jackets commonly require at least grade 4 on blue denim and grade 3 on black sulphur-dyed panels. Crocking per AATCC TM8-2021e2 after the stiff hand application must not drop by more than one-half grade compared with the garment before final rinse. The agent is not a substitute for resin-based anti-crease performance; if crease retention is specified, a low-formaldehyde resin should be applied before the stiffener step. Rigid denim jackets and workwear overshirts are the terminal products.
When finished articles are prepared for export, compliance documents are assembled around the following matrix.
| Regulation / standard | Parameter | Condition or method | Acceptance criterion |
|---|---|---|---|
| REACH Regulation (EC) No 1907/2006 Annex XVII | Restricted substances in articles | Article-level SVHC screening | No SVHC above 0.1% w/w |
| OEKO-TEX Standard 100 Annex 4 | Residual chemical limits | Product class II skin contact | Limits per Annex 4 by substance |
| ZDHC MRSL 3.2 | Input chemical inputs | Manufacturing restricted substances | No intentional use of listed substances |
| 16 CFR 1610 | Surface flammability | 45° flammability for clothing textiles | Class 1 or class 2 normal flammability |
| CPSIA section 101 | Total lead in children’s textiles | CPSC-CH-E1002-08.3 | 90 ppm max in accessible component |
| ISO 14184-1:2011 | Free and hydrolyzed formaldehyde | Aqueous extraction | 75 ppm adult; 16 ppm children where required |
| AATCC TM8-2021e2 | Colorfastness to crocking | Dry and wet crock | Grade 4 dry / grade 3 wet or better |
| ASTM D1388-18 or ASTM D4032-08(2016) | Stiffness | Bending length / circular bend | As agreed in buyer specification |
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High Concentrated Wool Soft Finishing Agent RH-NB-56G and Cool Feeling Stiff Finishing Agent RH-NB-633A are supplied as separate aqueous textile auxiliaries for wool, wool/polyester, and cellulosic blend finishing. RH-NB-56G is a high-solids soft-handle agent intended for low-dosage exhaust and pad applications; RH-NB-633A is a stiffening finish designed to increase bending resistance while imparting a cool-touch surface character. The two products are not interchangeable and should be evaluated under different handle, drape, and dimensional stability criteria. Both materials require laboratory pre-trials on production fabric before bulk dosing because liquor composition, heat setting history, and residual surface chemistry alter uptake and film formation.
The working concentration of RH-NB-56G is limited primarily by handle development, liquor shear stability, and tailing on continuous pad-troughs. Typical high-concentrate softeners of this class are supplied as viscous dispersions with solids content in the range of 28–32% by mass and a pH of 4.0–6.0 as supplied; the manufacturer’s certificate of analysis remains the controlling document for RH-NB-56G. In padding, the product is commonly diluted to a bath concentration of 20–50 g/L for wool blends, with wet pickup adjusted to 60–80% on a pad mangle. Lower pickup can produce a drier, leaner film, while higher pickup may increase fibre cohesion and alter sewability. Hard water with calcium hardness above 150 mg/L expressed as CaCO₃ should be pre-softened because cationic/nonionic dispersions may lose emulsion stability and deposit on pad rolls.
Dilution of RH-NB-56G should be performed under moderate mechanical agitation, not high-shear mixing. Production lines using centrifugal pumps, especially at speeds above 2900 rpm, may induce shear-induced creaming and reduce the apparent particle size distribution. A better transfer method is a low-speed positive-displacement pump or gravimetric dosing into a stirred run tank. The diluted bath should be used within 8 h in tropical production halls; longer standing without recirculation can result in surface film formation and concentration gradients. In soft-flow machines, addition should be made through a side tank with dilution at 1:5 to 1:10 water ratio before injection into the main chamber.
Exhaustion application of RH-NB-56G on wool is typically performed at 35–45 °C for 20–30 min at a bath pH of 4.5–5.5, adjusted with acetic acid. Liquor ratio is substrate-dependent; short-liquor jets and overflow machines may run at 1:6 to 1:20. The addition of 2–5% o.w.f. is a practical starting range for soft handle development, but exact dosage must be established through panel assessment because wool fineness, yarn twist factor, and fabric cover vary. Lower temperatures reduce uptake, while temperatures above 50 °C may cause rapid exhaustion and unlevel softener distribution in rope form. After exhaust application, hydroextraction and drying should avoid direct contact with hot steam pipes exceeding 120 °C, because excessive surface temperature can discolour residual softener films.
Specifications for RH-NB-633A differ in ionic character and film hardness. Product literature for cool-touch stiffening agents of this class describes a milky to translucent dispersion, water-miscible in all proportions, with formation of a clear to slightly hazy film after drying at 130–150 °C. Batch-specific pH, solids, and particle size should be verified from the supplier’s certificate of analysis. The product is intended for pad application rather than exhaustion because its film-forming behaviour requires uniform mechanical expression. In pad-dry-cure sequences, RH-NB-633A is commonly evaluated in the range of 30–80 g/L, with a nipping pressure of 1.5–3.0 bar depending on fabric absorbency. Drying should be carried out at 110–130 °C with a dwell time sufficient to reduce moisture content below 8% before curing.
When RH-NB-633A replaces starch, modified starch, or polyvinyl alcohol stiffeners, the final fabric exhibits a different bending recovery and surface thermal sensation. Starch-based finishes produce high initial stiffness but are easily removed by washing and can generate dusting during cutting and sewing. Polyvinyl alcohol binders yield firmer films but often have a warm, tacky handle under skin contact. RH-NB-633A combines stiffening with a cool-touch character, which is assessed through transient contact heat flux rather than conventional drape alone. However, the cool-touch effect is not a substitute for mechanical stiffness; the required bending length should be controlled by dosage and pad pickup, not by over-drying the film. Over-curing above 160 °C may produce film yellowing and reduce the cool-touch intensity.
Compared with conventional low-solids softeners, RH-NB-56G reduces transported mass per unit active matter. A high-concentrate product with approximately 30% solids delivers the same active content as three times the volume of a 10% emulsion. The difference is operational rather than purely chemical: smaller storage tanks, lower freight mass, and reduced packaging waste are obtained, but dilution accuracy becomes more critical. Conventional ready-to-use emulsions may be easier to dose in manual plants, whereas RH-NB-56G is more suitable for production lines with automated dosing and in-line dilution. Viscosity of the concentrate is temperature-sensitive; storage below 15 °C may increase viscosity and make pumping difficult. In such conditions, the product should be conditioned at 20–30 °C for 24 h before use.
A significant operational difference is the response to strong anionic auxiliaries. RH-NB-56G and RH-NB-633A should not be combined with high-charge anionic dispersions such as sulfonated fatty acid condensates, naphthalene sulfonate-formaldehyde dispersants, or anionic optical brighteners without a compatibility pre-test. The combination may form a gel or precipitate that blocks pad rolls and strainers. If an anionic fluorescent whitening agent is required, it should be applied in a separate bath or after the softener with intermediate drying. Cationic dye fixatives should be checked for coacervation; the mixture may become turbid or increase particle size. A simple ratio test in a clear beaker at the working concentration can screen compatibility before production, but full-scale trial is necessary because shear and pH shift alter stability.
Thermal stability of the finished fabric after RH-NB-633A treatment is governed by residual film characteristics. A typical drying window of 110–130 °C is sufficient to remove water and form a coherent film, while a short curing step at 140–150 °C improves adhesion to wool scales and increases laundering durability. Excessive curing at 180 °C or above may cause film browning and loss of cool-touch properties, particularly on wool/polyester blends where the polyester surface can plasticize at high temperatures. The cooling sensation is best evaluated under controlled climate conditions at 20–25 °C and 60–65% relative humidity. No single ISO method covers subjective cool-touch; instrumented Qmax measurement using a transient heat-flux apparatus such as KES-F7 Thermolabo or equivalent has been reported in textile research, but published data for this specific configuration is limited.
Durability testing should include home laundering according to ISO 6330:2012 and stiffness after wash. Repeated laundering may reduce cool-touch and stiffening effect because the film is partially removed or plasticized by detergents and softeners. In contrast, RH-NB-56G as a softener is expected to maintain a soft handle after washing if it has been fixed under appropriate heat. The two products may be used in sequence: RH-NB-56G is applied in a wet processing stage to reduce fibre friction, while RH-NB-633A is applied as a final pad finish to impart surface stiffness and cool-touch. When used in the same bath, preliminary tests should focus on bath stability and dry film clarity, because high-concentrate softeners can plasticize the stiffener film.
| Finished fabric property | Standard designation | Relevance to RH-NB-56G and RH-NB-633A |
|---|---|---|
| Dimensional stability under laundering | ISO 6330:2012 | Verifies that stiffening finish does not mask relaxation shrinkage |
| Bending stiffness | ASTM D1388-18 | Quantifies the stiffening effect of RH-NB-633A |
| Pilling resistance | ISO 12945-2:2020 | Assesses surface fibre cohesion after softening or stiffening |
| Colour fastness to rubbing | ISO 105-X12:2016 | Detects film transfer or crocking on dyed wool blends |
| Tensile strength and elongation | ISO 13934-1:2013 | Monitors fibre or film embrittlement after curing |
| pH of aqueous extract | ISO 3071:2020 | Confirms skin-contact compatibility of finished fabric |
Chemical inventory compliance should be verified against the current text of Regulation (EC) No 1907/2006 for REACH duties and against the latest OEKO-TEX Standard 100 limits for the intended product class. The finishing plant should maintain batch records linking the final article to the specific RH-NB-56G and RH-NB-633A lot numbers, because changes in raw material supply or emulsification can influence dye fastness and skin contact behaviour. If the final fabric is intended for infant or direct skin contact applications, additional extractables testing may be required by the brand or importer.
Storgage of both products should avoid freezing and prolonged exposure to direct sunlight. The recommended storage range is 5–35 °C. Containers should be sealed when not in use and re-mixed before drawing because slight sedimentation may occur after prolonged standing. Opened containers should be used within 6 months. Drums should not be stored next to strong oxidizing agents or open heat sources. Empty containers may retain residual product and should be handled in accordance with local waste and packaging regulations.
A production-scale failure commonly observed on continuous lines is deposit formation on the last two drying cans after the stiffening pad. This occurs when RH-NB-633A bath concentration exceeds the fabric absorption capacity and excess liquor is expressed unevenly at the nip. The deposit is then baked onto the can surface and can mark subsequent fabric. The corrective action is to reduce bath concentration or increase nip pressure while maintaining a wet pickup below 85%. If deposit formation continues, the can surface temperature should be checked with a contact pyrometer; surface temperatures above 140 °C can accelerate film adhesion. In exhaust processing of RH-NB-56G, rapid addition through the main pump without pre-dilution has been observed to produce oily spots on wool jersey; the problem is avoided by side-tank dilution and controlled injection over 10–15 min.
For fabrics containing elastane or polyamide, the cool-touch finish may be less perceptible because the synthetic component reduces moisture-driven heat transfer. In such blends, the stiffening effect of RH-NB-633A remains measurable by bending length, but the cool-touch difference may require sensory panel confirmation under standardized conditions. For cellulosic blends, reduced moisture regain after film coating can alter the cooling effect; published data for this specific configuration is limited, so production trials should evaluate both dry and conditioned handle. The two products are not intended as flame retardants, water repellents, or antimicrobial finishes; additional functional finishes may be needed and should be assessed for interference.
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