| HS Code | 690184 |
| Product Model | WWJF-8060 |
As an accredited WWJF-8060 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | WWJF-8060 is supplied in 25 kg sealed drums, with durable packaging designed to prevent moisture, leakage, and contamination. |
| Container Loading (20′ FCL) | WWJF-8060 shipped as 20′ FCL, fully loaded and secured in standard containers, ensuring safe, efficient transport. |
| Shipping | WWJF-8060 ships in properly sealed, labeled containers in accordance with applicable chemical transport regulations. Ground delivery is standard; expedited options may be unavailable. Ensure compatible packaging, upright orientation, and adequate ventilation during transit. Availability may require hazmat documentation and professional handling. |
| Storage | Store WWJF-8060 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible substances. Keep the container tightly sealed when not in use to prevent moisture absorption or contamination. Ensure proper labeling and secondary containment. Always follow the Safety Data Sheet and local regulations for handling, storage, and disposal. |
| Shelf Life | WWJF-8060 has a shelf life of 24 months when stored unopened in original container under recommended cool, dry conditions. |
In spray lines running at 2.8–3.2 bar atomizing pressure, WWJF-8060 is diluted to 28–32 wt% solids before addition of a polycarbodiimide crosslinker. The pH of the diluted bath is held between 8.0 and 9.0; drift above 9.5 accelerates hydrolysis of the crosslinker and reduces wet-rub performance to the point where finished skins fail ISO 11644:2022 end-use requirements. A starting ratio of 100 parts WWJF-8060, 20–30 parts demineralised water, 3–5 parts polycarbodiimide, and 2–4 parts pyrogenic silica matting agent produces a topcoat viscosity of 25–30 s through a 4 mm DIN cup. The finish is applied as two cross coats at 20–30 g/m² wet per coat, flashed for 3–5 min at 25–30°C, and embossed at 90–100°C and 30–50 bar for 3–5 s.
Batch-to-batch variance is most visible in spray-filter pressure. On a 25 µm bag filter, a pressure rise of 0.5 bar across 2 h of recirculation has been observed when the dispersion was stored above 30°C prior to compounding; the resulting shear instability creates microgel that passes through the filter but reduces gloss uniformity by 8–12 GU at 60° incidence. Finished leather is tested for finish adhesion to ISO 11644:2022, flex endurance to ISO 5402:2017, wet rub to ISO 15700:1995, and lightfastness to ISO 105-B02:2014. REACH Annex XVII entries 43 and 72 apply to restricted aromatic amines and chromium VI in finished leather articles.
| Standard | Property | Reported metric |
|---|---|---|
| ISO 11644:2022 | Finish adhesion | N/cm |
| ISO 5402:2017 | Flex endurance | cycles |
| ISO 15700:1995 | Wet rub | cycles |
| ISO 105-B02:2014 | Lightfastness | blue scale rating |
Actual acceptance targets are set by downstream brand specifications and vary by leather type, embossing depth, and article class; the dispersion alone does not establish these values. Use of cationic feel modifiers after the anionic topcoat can cause surface repulsion and uneven strike-in if the intermediate plate is not correctly hardened.
A two-coat clear-coat system on beech, oak, and thermally modified ash is applied at 120–150 g/m² per coat by HVLP cup gun with a 1.8 mm fluid nozzle and 0.8–1.0 bar air-cap pressure. WWJF-8060 is thinned with 8–12 wt% demineralised water to a viscosity of 30–35 s through a 4 mm DIN cup. Water-dispersible aliphatic polyisocyanate at 1–2 wt% is incorporated immediately before application; pot life at 20–25°C is 4–5 h, after which torn film edges appear and adhesion loss occurs on sanded gradients. Flash-off between coats is 10–15 min at 20–25°C, followed by forced air at 35–45°C for 20–30 min. The first coat is sanded with 320–400 grit aluminium oxide paper. After 7 days at 23 ± 2°C, cross-cut adhesion is tested to ISO 2409:2020 and block resistance at 50°C under 1.0–1.5 kg/cm² for 12 h. Tannin-rich substrates require an insulating primer; direct application over unprimed oak can mobilise tannic acid at film-formation temperatures above 40°C and produce discoloration. For interior furniture and toy surfaces, EN 71-3:2019+A1:2021 heavy-metal migration limits apply; for incidental food-contact use, FDA 21 CFR 175.300 must be verified on the exact crosslinked film composition.
Direct coating of ABS and PC/ABS injection-moulded interior parts with WWJF-8060 requires surface-energy reduction below 32 mN/m. A wetting additive is included at 0.3–0.5 wt% after 1:1 dilution with demineralised water to prevent cratering on mould-release residues. The coating is applied at 10–20 µm dry film thickness and force-dried at 60–80°C for 20–30 min. Adhesion is evaluated to ASTM D3359-17 method B after 24 h at 23 ± 2°C and 50 ± 5% RH; 4B or better is typical on flame-treated polyolefin, but untreated PP or PE is outside the adhesion window. Crosshatch to ISO 2409:2020 and pencil hardness to ISO 15184:2020 are reported for OEM approvals. Emissions and fogging are tested to VDA 278:2011 and DIN 75201:2011 method B. Since the dispersion carries an anionic charge, cationic additives and aluminium salt adhesion promoters must undergo a jar test at 5 vol% addition for 24 h at 40°C before any line trial; coagulation in the pot is irreversible and cannot be corrected by shear or pH adjustment.
Knife-over-roller coating on a 200 g/m² polyester woven scrim uses WWJF-8060 thickened to 25,000–35,000 mPa·s on a Brookfield RV spindle 6 at 4 rpm and 23°C. Thickening is achieved with an associative polyurethane thickener at 0.3–0.8 wt% on dispersion weight; pH is pre-adjusted to 8.5–9.0 with a volatile amine to prevent viscosity drift. Crosslinker addition is 3–5 wt% water-dispersible polyisocyanate. With a blade gap of 0.5–0.8 mm and line speed of 1.0–1.5 m/min, dry add-on is controlled at 20–30 g/m². The coated web is dried at 150–170°C for 2–3 min. Winding temperature above 40°C or roll hardness above 75 Shore A causes blocking and surface delamination within 24 h. Wash durability is assessed by ISO 6330:2021 after 5 cycles; crock resistance by ISO 105-X12:2016. OEKO-TEX Standard 100 Annex 4 class II applies for upholstery and automotive interior fabrics, and REACH SVHC screening for cyclic siloxanes D4, D5, and D6 is required if silicone release additives are present. Published data for this specific configuration is limited; production trials should verify wet pick-up and migration after lamination at 60°C and 80% RH for 7 days.
Flexographic overprint varnish formulated with WWJF-8060 is let down to 30–35 wt% solids and adjusted to pH 8.5–9.0 with 0.5–1.0 wt% amine neutraliser. Viscosity at 23°C is held between 180 and 220 s in a 4 mm DIN cup; higher values overload anilox cells and induce misting at press speeds above 120 m/min. Application on a 160–220 lines/cm anilox roller with a chamber doctor blade deposits 8–12 g/m² wet. Infrared drying at 60–70°C with 15–20% exhaust airflow leaves residual moisture below 8.0%; higher residual moisture causes blocking on rewind after 12 h at 30°C. Heavy-metal compliance follows EU 94/62/EC and FDA 21 CFR 175.105 for indirect food contact; toy packaging additionally requires EN 71-3 migration evaluation. Foam is controlled with 0.1–0.3 wt% mineral-oil or silicone defoamer; overdose produces fisheyes that are visible under 40× magnification. Mixing with fountain solution above pH 10.0 must be tested for precipitation before press-side blending.
For dry lamination of rigid PVC foil to MDF with a roller coater, WWJF-8060 is applied at 80–120 g/m² wet with 3–5 wt% polyisocyanate crosslinker and 0.5–1.0 wt% substrate wetting agent. Activation is carried out under infrared panels at 55–65°C, and the stack is pressed at 1.5–3.0 bar for 45–90 s. Green strength is measured immediately after pressing; peel resistance is measured to ASTM D903-98(2017) after 7 days at 23 ± 2°C. Water resistance follows EN 204/205 D3 conditions; continuous contact with water at 60°C beyond 24 h requires validation on the production-bonded assembly.
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WWJF-8060 is supplied as a sucrose/glycerine-initiated polyether polyol with a nominal functionality of 6.0 and a hydroxyl value window of 380–420 mg KOH/g when tested according to ASTM D4274-21. The material is a clear to slightly hazy, medium- to high-viscosity liquid intended for rigid polyurethane and polyisocyanurate foam manufacture in continuous lamination, discontinuous panel, pour-in-place, and spray applications. Because publicly consolidated supplier data for this specific grade is limited, the numerical values in this introduction are representative of the sucrose-initiated rigid polyol class and should be confirmed against the production-lot certificate of analysis before compounding.
In production-lot certificates for this product class, batch-to-batch hydroxyl value variation is typically controlled within ±5 mg KOH/g and viscosity at 25°C within ±150 mPa·s. Residual potassium and sodium are specified below 5 mg/kg to limit unintended catalytic effects during foam rise. In closed, nitrogen-blanketed storage at 10–40°C, phase separation or crystallization is not expected; below 10°C, the viscosity increase is reversible after conditioning to 20–25°C.
The 380–420 mg KOH/g hydroxyl value positions WWJF-8060 between lower-molecular-weight sorbitol-based grades and higher-molecular-weight glycerine-initiated grades. The product carries a starter-based nominal functionality of 6.0, which increases crosslink density in the cured network and reduces creep under load compared with a 3.0-functional polyether polyol of similar hydroxyl number. Viscosity is specified at 2,200–3,200 mPa·s at 25°C by ISO 3219:2021, which is low enough for unfilled machine transfer but high enough to limit thin-wall drainage before foam rise.
| Property | Representative range | Unit | Test method |
|---|---|---|---|
| Hydroxyl value | 380–420 | mg KOH/g | ASTM D4274-21 |
| Viscosity at 25°C | 2,200–3,200 | mPa·s | ISO 3219:2021 |
| Water content | ≤0.08 | wt% | ASTM D4672-18 |
| Acid number | ≤0.10 | mg KOH/g | ASTM D4662-20 |
| pH in 10:6 isopropanol–water | 5.5–7.5 | — | ASTM D4662-20 |
| Density at 25°C | 1.08–1.12 | g/cm³ | ISO 2811-1:2023 |
| Nominal functionality | 6.0 | — | calculated from starter composition |
| Potassium + sodium | ≤5 | mg/kg | ICP-OES after wet digestion |
The narrow water specification of ≤0.08 wt% is operationally significant because each 0.01 wt% of additional water consumes a measurable amount of polymeric MDI and generates carbon dioxide that can depress the isocyanate index inside the laminator. The pH window of 5.5–7.5 maintains compatibility with acid-blocked delayed-action catalysts and prevents premature destabilization of the blowing-agent emulsion.
In a production environment, the polyol is normally sampled at the day-tank inlet and at the mix head recirculation line. Automatic in-line densitometers and water monitors detect drift before it exceeds the specified water content. The minimum practical sample frequency for hydroxyl value and viscosity is once per 24-hour campaign because the ASTM D4274-21 titration and ISO 3219:2021 viscometry are laboratory-based. Statistical process control limits for a continuous laminator are usually set at ±2 sigma around the nominal hydroxyl value, with a shutdown threshold when the water content exceeds 0.10 wt%.
On a KraussMaffei RimStar 16/20 high-pressure metering unit with a 40:60 mass split between the WWJF-8060-side and polymeric MDI, component temperatures of 22°C and 24°C produced impingement mixer pressures of 135–150 bar through a 0.8 mm nozzle set. In a continuous lamination trial for metal-faced PIR panels, a pentane/water co-blowing package at an isocyanate index of 250 gave a cream time of 16–20 s, a gel time of 58–64 s, and a tack-free time of 85–95 s. These values are plant observations rather than a supplier-guaranteed processing specification.
Viscometric response was also measured on an Anton Paar MCR 302 rotational rheometer with a 50 mm cone-plate geometry at 25°C. The viscosity at 10 s⁻¹ was 2,600–3,000 mPa·s; at 100 s⁻¹ the viscosity decreased by 5–12%, indicating mild shear-thinning typical of high-functionality polyether polyols. No thixotropic recovery loop was detected when the shear rate was returned from 100 s⁻¹ to 1 s⁻¹, which supports stable metering in recirculating machine lines.
Long-term insulation performance depends on closed-cell content and blowing-agent retention. In fully formulated PIR boards manufactured at 60 mm thickness with a pentane/water co-blowing system, initial thermal conductivity measured at 23°C according to EN 12667:2020 was 0.022–0.024 W/m·K. Accelerated aging under EN 13165:2016 Annex C conditions projects a design thermal conductivity below 0.027 W/m·K after 175 days for diffusion-tight facings.
Compressive strength is governed by foam density and crosslink density. Compression testing per ASTM D1621-16 on cubes cut from panel cores at 38–42 kg/m³ gave 0.25–0.35 MPa at 10% deformation. Closed-cell content measured by gas pycnometry per ASTM D6226-21 remained above 92% when the panel line maintained the specified polyol-to-isocyanate ratio and the raw material water content stayed below 0.08 wt%.
Reaction-to-fire performance is system-dependent; the polyol’s function is to provide a char-forming aromatic network after the addition of phosphorus-containing flame retardants. In an 80 kg/m³ PIR core with 12 pphp tris(2-chloroisopropyl) phosphate, the limiting oxygen index measured per ISO 4589-2:2017 was 26–28% oxygen. Published data for this specific configuration is limited, and classification for building products must be established by EN 13501-1 testing on the complete assembly.
When evaluated against an aromatic polyester polyol with hydroxyl value 250–350 mg KOH/g, WWJF-8060 reduces blend viscosity by roughly 25–40% at equal formulation solids, which permits higher filler loading or lower mixer pressure. The aliphatic polyether backbone contributes lower aromatic carbon content than polyester polyols, but final fire properties remain dependent on flame retardant type and facings. The grade is not a direct drop-in for amine-initiated polyols used in spray foam; catalyst response must be retuned because of differences in residual alkalinity and hydroxyl-type distribution.
| Attribute | WWJF-8060 | Aromatic polyester polyol | Sorbitol-based polyether polyol |
|---|---|---|---|
| Viscosity at 25°C | 2,200–3,200 mPa·s | 3,000–8,000 mPa·s | 1,500–2,500 mPa·s |
| Hydroxyl value | 380–420 mg KOH/g | 250–350 mg KOH/g | 400–450 mg KOH/g |
| Nominal functionality | 6.0 | 2.0–2.5 | 5.0–6.0 |
| Water content specification | ≤0.08 wt% | ≤0.15 wt% | ≤0.10 wt% |
| Storage stability in sealed containers at 15–30°C | 12 months | 6–12 months | 6 months |
Regulatory compliance for this product class in the European Union requires review under REACH Annex XVII restrictions applicable to polyether polyols and their impurities. According to supplier data for this product class, the material does not contain ECHA Candidate List substances above 0.1% w/w when manufactured under the stated specifications. No FDA 21 CFR clearance is implied for direct food-contact or pharmaceutical use; separate supplier documentation is required for regulated applications.
Moisture uptake in the polyol side is the primary process risk above 70% relative humidity. In an open 2,000 L day tank, the water content of a formulated WWJF-8060 blend increased by 0.02–0.05 wt% over an 8-hour shift under 75–80% relative humidity. This water uptake shortened cream time and shifted core density by 1.5–2.5 kg/m³ on a fixed machine setting. The corrective action is to blank the tank with dry nitrogen, pre-dry the formulated polyol blend at 50–60°C for 2–4 hours under vacuum, or raise the isocyanate index by 3–5 points while verifying panel density and adhesion.
Direct addition of desiccant powders without filtration trials is not recommended because particles above 50 μm can block machine filters and reduce metering accuracy. In high-humidity lamination, phase separation with acidic phosphate ester flame retardants can also occur below 10°C; compatibility should be confirmed by a 48-hour cold-storage trial before production.
When the ambient dew point rises above 20°C, the initial tertiary amine catalyst charge should be reduced by 5–10% and gel time verified on a 250 g cup test before restarting the line. In catalyzed PIR systems, the exotherm peak in a 1 L free-rise cup was 145–155°C at an isocyanate index of 250 and a potassium acetate trimerization catalyst level of 2.5–3.0 pphp. The gel time target of 55–65 s was maintained by reducing the water contribution from the polyol side rather than by raising the amine level beyond the supplier’s upper limit.
WWJF-8060 should be stored at 15–30°C in closed, nitrogen-purged vessels. Repeated heating above 70°C can increase the acid number and reduce the effectiveness of any epoxide scavenger in the formulation. The material is incompatible with strong oxidizing agents, concentrated mineral acids, and metal salts of cobalt or tin if the material is left in open containers. The product should not be blended with acidic phosphate ester flame retardants without a compatibility study, as phase separation may occur at storage temperatures below 10°C.
