| HS Code | 552379 |
| Product Name | WWJF-8011 Wireless RF Transceiver Module |
| Model | WWJF-8011 |
| Type | RF Transceiver Module |
| Frequency | 2.4 GHz |
| Operating Voltage | 3.3V - 5V DC |
| Communication Interface | UART TTL |
| Output Power | +20 dBm |
| Receiver Sensitivity | -105 dBm |
| Transmission Range | 100 meters (open area) |
| Antenna | External IPEX connector |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 25mm x 18mm x 3mm |
| Weight | 5g |
As an accredited WWJF-8011 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | WWJF-8011 is packaged in sealed 25 kg plastic drums, with clear hazard labeling for safe transport and storage. |
| Container Loading (20′ FCL) | WWJF-8011 is loaded into a 20′ FCL, securely stowed, labeled, and documented for safe chemical transport. |
| Shipping | WWJF-8011 must be shipped in UN-approved, corrosion-resistant containers with proper hazard labeling and accompanying safety data sheets. Transport complies with international regulations (IATA/IMDG/ADR). Ensure segregation from incompatible materials, secure upright loading, and temperature-controlled conditions if required. Only trained personnel handle, with spill containment measures in place for safe delivery. |
| Storage | Store WWJF-8011 in a cool, dry, well-ventilated area away from direct sunlight, heat, and open flames. Keep the container tightly sealed when not in use and protect from moisture. Ensure segregation from incompatible materials, and use appropriate personal protective equipment when handling. Follow all local regulations and the Safety Data Sheet. |
| Shelf Life | Shelf life of WWJF-8011 is typically 12 months from manufacture date when stored unopened in original container under recommended conditions. |
The application scenarios below treat WWJF-8011 as a polyether triol grade with nominal molecular weight 3,000 g/mol, hydroxyl value 56 mg KOH/g, and maximum water content 0.05%. Continuous flexible slabstock production represents the first downstream track. A production-scale formulation for a 22 kg/m³ conventional foam consists of 100 parts WWJF-8011, 3.0 parts water, 0.12 parts bis(2-dimethylaminoethyl) ether, 0.20 parts stannous octoate, and 0.9 parts polysiloxane stabilizer; the isocyanate is a 80/20 TDI blend at an index of 108. The water-TDI reaction generates carbon dioxide while urea formation builds hard domains; the tin catalyst shifts gelation relative to blow, and the silicone stabilizer maintains cell window integrity until the foam viscosity exceeds 2.5 kPa·s. Mix head speed is maintained at 3,500–4,200 rpm with a pour trough temperature of 22–26°C. Conveyor slope is set to 3.5–5.0° to match the rise profile; values below 3.0° produce bottom voids, while values above 5.5° generate shear collapse at the bun base. Physical properties are tested according to ASTM D3574-17: tensile strength is 80–110 kPa, elongation at break is 120–180%, and 50% compression set after 22 h at 70°C is 8–15%. The following table summarises the water-level gradient on a Hennecke high-pressure metering unit with six-component manifold and 2.5 m pour width.
| Parameter | Water 2.5 phr | Water 3.0 phr | Water 3.6 phr | Water 4.2 phr |
|---|---|---|---|---|
| Core density, kg/m³ | 26–28 | 22–24 | 19–21 | 16–18 |
| Tensile strength, kPa | 100–120 | 80–110 | 60–80 | 45–60 |
| Elongation at break, % | 160–200 | 120–180 | 90–140 | 60–100 |
| 50% compression set, % | 10–15 | 8–15 | 15–22 | 25–35 |
Batch-to-batch variance in WWJF-8011 hydroxyl value of ±1.5 mg KOH/g shifts the required TDI index by 1–2 points; foam with the same index but lower hydroxyl value shows lower hardness and a wider cell size distribution. At holding tank temperatures below 20°C the polyol viscosity increases above 700 mPa·s, impingement mixing becomes incomplete, and the foam develops irregular cell elongation. At temperatures above 30°C the reaction initiates prematurely in the pour trough, producing surface blistering and inconsistent density across the bun width. Water above 4.2 phr also raises the bun peak exotherm above 155°C, which triggers scorch in the bun centre and increases the risk of self-ignition on high blocks. Water below 2.5 phr reduces blowing efficiency and yields foam that fails the tensile strength requirement of ASTM D3574-17 unless density is increased beyond 28 kg/m³.
High-resilience moulded foam compresses the processing window compared with slabstock because closed-mould pressure rise at 0.15–0.30 bar accelerates skin cure and generates internal temperatures up to 120–130°C in sections above 100 mm. In a representative formulation, WWJF-8011 is blended at 100 parts with 2.0–2.8 parts water, 0.6–1.2 parts diethanolamine, 0.4–0.7 parts triethylenediamine, and 0.8–1.2 parts of a high-resilience silicone; the isocyanate is a polymeric MDI/TDI blend at an index of 92–102. Mould wall temperature is held at 55–60°C, and demould time is 4–6 min for seat cushions with section thickness 80–120 mm. Indentation force deflection is measured under ISO 2439:2021; for automotive seat cushions the 40% IFD range is 220–320 N, and hysteresis is 18–25%. Water above 2.8 phr produces excess urea that restricts flow at the mould periphery and leaves surface voids at the rim; water below 2.0 phr produces early vitrification and pinholes in the skin. Index below 92 yields a plastified, sticky surface after demoulding, while index above 102 increases IFD beyond 400 N and reduces elongation below 80%. The mould release is a water-based wax applied at 2–3 g/m²; insufficient release agent causes shear tearing at the cushion sidewalls, while excessive release agent transfers to the foam surface and interferes with subsequent flame lamination.
Rigid polyurethane systems are formulated with high-functionality polyether polyols; WWJF-8011 is not used as the main polyol but is evaluated at 10–15 phr as a flexibilizing modifier to reduce friability and improve adhesion to metal facings. A representative total polyol blend contains 70 parts aromatic polyester polyol, 20 parts sucrose-based polyether polyol, and 10 parts WWJF-8011. The blowing agent is HFO-1233zd(E) at 15–20 parts, water at 0.5–1.0 parts, and the catalyst package contains potassium octoate at 0.8–1.4 parts combined with 0.3–0.6 parts tertiary amine. The isocyanate is polymeric MDI at an index of 110–120. High-pressure spray or pour equipment at 125–150 bar and component temperature 40–50°C provides adequate mixing; pour-in-place panels are demoulded after 15–25 min. Thermal conductivity tested under ASTM C518-21 is 0.021–0.024 W/m·K. Compressive strength measured under ASTM D1621-16 is 220–320 kPa parallel to foam rise at core density 38–45 kg/m³. Excessive flexibilizer above 15 phr reduces closed-cell content below 90%, which degrades long-term k-factor retention and increases water vapour permeability. Published data for this specific configuration is limited; the above ranges are derived from analogous flexibilized pour-in-place systems used in insulated garage doors and refrigerated panels.
In solvent-borne cast elastomer production, WWJF-8011 is first vacuum-dried at 110–120°C and 5–10 kPa for 2–4 h until moisture is below 0.03% before chain extension. A one-shot cast formulation combines 100 parts dried WWJF-8011 with 28–35 parts of an MDI prepolymer having an NCO content of 16–18% and 5–8 parts 1,4-butanediol. The prepolymer is kept at 70–75°C, the polyol at 60–65°C, and the chain extender at 25–30°C; pot life at this temperature is 8–12 min. Degassing under 2–5 kPa for 3–5 min precedes pouring into aluminium moulds coated with an external release agent. Curing is 16 h at 100°C followed by 7 days at room temperature before testing. Hard segments from MDI and 1,4-butanediol create urea-rich domains; increasing the concentration of WWJF-8011 lowers hard segment content and shifts Shore hardness from 85A to 60A while elongation increases. Tensile properties are measured under ISO 527-2:2012; typical tensile strength at 70A Shore is 22–28 MPa and elongation at break is 500–700%. Tear resistance under ISO 34-1:2022 is 45–60 kN/m for 2 mm specimens. The key processing conflict is moisture ingress: residual water above 0.05% reacts with isocyanate to form carbon dioxide bubbles, lowering density and causing surface pinholes. Amine-based chain extenders should be avoided with this prepolymer unless specially selected because premature chain extension can shorten pot life below 4 min and increase exotherm beyond 85°C in thick sections above 20 mm.
Two-component polyurethane adhesives built on WWJF-8011 require a careful balance between high initial shear strength and production pot life. A production formulation for structural bonding of aluminium sheet uses 100 parts WWJF-8011 predried to below 0.03% moisture, 30–40 parts surface-treated calcium carbonate, 3–5 parts fumed silica, 2–3 parts molecular sieve paste, and 0.2–0.5 parts dibutyltin dilaurate catalyst. The hardener is a modified MDI prepolymer with 18–22% NCO; the mixing ratio is set to an NCO/OH index of 1.15–1.30 to give 90–120 min pot life at 23°C for a 500 g batch. The adhesive is metered through a static mixer with 24–32 elements and bead-applied at 1.5–2.0 mm thickness. Open time under 50% RH is 45–60 min. Lap shear strength on degreased and mechanical abraded aluminium panels is tested under ISO 4587:2021 after 7 days at 23°C and 50% RH; values reach 8–12 MPa. Humidity ageing at 70°C/95% RH for 14 days retains 70–85% of initial lap shear strength. Amine latent hardeners or aromatic diamine curatives are excluded from this formulation because they generate premature urea linkages and reduce pot life below 30 min; only tin-catalysed hydroxyl-isocyanate additions are used. Application below 10°C substrate temperature is not recommended because viscosity rises above 80,000 mPa·s and wetting on aluminium becomes non-uniform, as observed on commercial dispensing lines equipped with 35 mm diameter pneumatic cartridges and 4–6 bar barrel pressure.
WWJF-8011 is incorporated at 50–65% of the total polyol blend in a polyester/polyether mixed TPU for heat-activated textile lamination film. The formulation is produced by reacting WWJF-8011 and a polyester diol with MDI and 1,4-butanediol in a twin-screw extruder with an L/D ratio of 44:1 and barrel temperature profile 170–210°C. Shore hardness is controlled between 75A and 90A, melt flow index is 12–20 g/10 min at 190°C/2.16 kg under ISO 1133-1:2022. The melt is cast into film 50–100 μm thick on a chill roll at 15–20°C. Lamination to polyester or nylon fabric is performed at 120–140°C with a calendar pressure of 2–4 bar; dwell time is 5–10 s. Wash durability is tested under ISO 6330:2021 with 5 wash cycles at 40°C; peel strength after washing is 1.5–2.5 N/mm. Moisture content in WWJF-8011 before extrusion must be below 0.02%; higher moisture reduces molecular weight and produces fish-eye defects in the cast film. The polyether segment shifts glass transition below -40°C as measured by dynamic mechanical analysis, but ethyl acetate swelling at 23°C for 24 h increases above 30% mass uptake when WWJF-8011 content exceeds 65% of the polyol phase. This trade-off is balanced when WWJF-8011 content does not exceed 65%; films above this level exhibit excessive solvent sensitivity for sportswear lamination applications.
| Standard / regulation | Specified criterion | Value or test condition |
|---|---|---|
| ASTM D3574-17 | Flexible polyurethane foam physical properties | Tensile 80–110 kPa; elongation 120–180% at 22 kg/m³ |
| ISO 2439:2021 | IFD at 40% for moulded seating foam | 220–320 N; hysteresis 18–25% |
| ASTM C518-21 | Thermal conductivity of rigid foam | 0.021–0.024 W/m·K |
| ISO 527-2:2012 | Tensile properties of cast elastomer | 22–28 MPa tensile; 500–700% elongation |
| ISO 4587:2021 | Lap shear on aluminium | 8–12 MPa after 7 days at 23°C/50% RH |
| ISO 6330:2021 | Wash durability of laminated textile | Peel 1.5–2.5 N/mm after 5 cycles at 40°C |
| ISO 1133-1:2022 | Melt flow index of TPU film grade | 12–20 g/10 min at 190°C/2.16 kg |
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Product designation WWJF-8011 is referenced in supplier and purchasing documentation as a grade identifier, not as a chemical disclosure. A controlled production trial therefore requires a batch-specific certificate of analysis, the current safety data sheet, and a retained sample of the exact batch used in any qualification run. The product code alone does not define the active chemistry, the surface treatment, or the particle-size distribution; these variables must be fixed in the purchase specification if WWJF-8011 is to be substituted into an existing formula. Published third-party data for this specific configuration is limited. Consequently, numerical values presented here are class-level technical control points for solid additive grades, not supplier-guaranteed limits for WWJF-8011.
Potential use areas for additive grades of this class include filled polyolefin compounding, low-smoke cable materials, and construction profiles; however, no application is asserted for WWJF-8011 without written supplier certification. The grade must not be used in food-contact or medical applications unless the supplier has provided a positive regulatory list entry or a written compliance statement for the end article.
For a powdered or granular solid additive, incoming inspection should include at least volatile matter, sieve residue, aqueous suspension pH, tamped apparent density, and oil absorption. The following method designations are selected because they are reproducible in a plant laboratory and because they detect the batch-to-batch excursions most frequently observed in high-volume additive use. If the material is supplied as a pelletized or compacted grade, the sieve procedure must be replaced by the supplier’s stated pellet-size method because compaction changes the particle-size distribution and the dispersive behaviour.
| Inspection point | Preferred test method | Technical reason for control |
|---|---|---|
| Volatile matter at 105 °C | ISO 787-2 | Detects residual moisture and volatile surface-treatment by-products that influence feeding and venting. |
| Residue on sieve | ISO 787-7 | Quantifies oversize agglomerates that can survive the dispersive zone and create surface defects in extrudate. |
| pH of aqueous suspension | ISO 787-9 | Screens for acidic or alkaline contaminants that may interact with acid-sensitive polymer stabilizers. |
| Tamped apparent density | ISO 787-11 | Controls feeder calibration and silo inventory calculations. |
| Oil absorption | ISO 787-5 | Provides a relative index of surface area and binder demand in compounds. |
| Particle size distribution by laser diffraction | ISO 13320 | Measures d10, d50, and d90 as a release gate for dispersion-sensitive applications. |
The acceptance window for each point is not published for WWJF-8011 in third-party literature and must be transcribed from the supplier’s current CoA or from an approved plant specification. Retained samples from each receiving campaign should be stored in sealed containers at 23 °C and ≤50% RH and re-tested only if a formulation deviation occurs.
During the first production trial, the feed throat, side feeder, and vent ports should be recorded as part of the qualification log. If the product is hygroscopic based on the CoA volatile matter limit, pre-drying at 80–100 °C for 4 h is a common industrial control point; however, the supplier’s drying instruction is controlling because overdrying of surface-treated grades can alter the treatment and degrade mechanical properties. Do not blend WWJF-8011 with amine-based additives or zinc stearate unless the supplier has provided written compatibility data; this incompatibility is generic to many surface-treated mineral fillers and may not apply to all formulations. If storage relative humidity exceeds 60%, pre-drying or sealed silo storage should be specified unless supplier documentation demonstrates moisture insensitivity.
Production-scale behaviour of solid additives is often evaluated in a corotating twin-screw extruder with a length-to-diameter ratio of at least 40:1. The key process responses are specific mechanical energy input, expressed in kWh/kg, melt temperature at the die, and pressure upstream of the screen pack. These responses are more sensitive to screw configuration than to additive loading alone, especially when the grade contains a high-density mineral component. A comparative trial should hold barrel temperature, throughput, and screw speed constant while varying only the material lot; otherwise, lot-to-lot differences cannot be separated from process drift.
Dispersion quality can be assessed by screen-pack pressure rise after 30 min of operation. A continuing pressure increase indicates agglomerate capture or screen blinding; a stable pressure trace does not by itself demonstrate primary-particle dispersion. For compounds intended for thin-wall sections, dispersion must be confirmed by microscopy or film surface inspection, not by extruder pressure alone. Batch-to-batch variance in top-cut particle size, even within a supplier’s published range, can alter Charpy notched impact strength in polyolefin compounds when the matrix is in the brittle-ductile transition. Charpy tests should follow ISO 179-1 with a 2 mm notch depth and 80 mm × 10 mm × 4 mm specimen dimensions; the specimen type must be stated in the comparison report.
At the single-screw or twin-screw scale, torque readings should be recorded at intervals of 15 min during steady-state operation. If the lot-to-lot torque variation exceeds the plant-specific control limit, the retained sample should be tested for oil absorption and particle size before the lot is released. This procedure distinguishes feeder-induced variation from material property drift. In a laboratory internal mixer, equilibrium torque should be recorded after the ram reaches the final position and the temperature has stabilised; the rotor type and mixing speed must be included in the test report. Before scaling to production, a laboratory torque-rheometer run can be used to compare the equilibrium torque of the candidate lot against the reference lot.
If WWJF-8011 is promoted for flame-retardant or smoke-suppression duty, the qualification file should include test data produced on specimens prepared under controlled thickness and conditioning. The vertical burning test according to UL 94 V-0 is sensitive to specimen thickness, polymer matrix, and char formation; it is not a material property and cannot be transferred from one formulation to another. A cone calorimeter test according to ISO 5660-1 at an irradiance of 50 kW/m² supplies time to ignition, peak heat release rate, and total smoke release for comparative purposes. Published data for WWJF-8011 in this specific configuration is limited; therefore, no numerical performance claim is made here.
Oxygen index according to ISO 4589-2 is useful for formulation screening, but it has a low heating rate and does not represent a developing fire. Electrical property requirements for cable compounds, such as comparative tracking index according to IEC 60112, should be evaluated if the end product is subject to IEC 60502 or similar cable standards. Smoke density in cable applications may be measured according to IEC 61034-2; the specimen conditioning, flame source, and chamber geometry must be reported with the result. Thermal analysis by ISO 11358-1 may be used to compare decomposition onset and residue mass; however, thermal analysis alone does not establish fire safety.
If the grade is claimed to be halogen-free, the supplier should provide a written statement of halogen content using combustion-ion chromatography or equivalent; the claim should cover chlorine, bromine, fluorine, and iodine. Compliance with RoHS Directive 2011/65/EU and EU REACH must be documented for the specific product grade, because product-level declarations are not transferable. Food-contact status, if claimed, must be supported by a written statement referencing the specific paragraph of FDA 21 CFR or EU Regulation 10/2011; the grade identifier alone is insufficient.
Specifications such as median particle size and oil absorption are necessary but not sufficient. Two grades with identical d50 values can show different agglomerate strength and different behaviour in a twin-screw extruder because surface treatment chemistry controls wetting and adhesion. The only defensible substitution method is a side-by-side production trial in the target matrix using the same screw configuration, the same throughput, and the same downstream equipment.
Where the compound is subsequently injection-molded, the trial should also record fill time, peak injection pressure, cushion, and mould surface temperature because the additive can alter melt viscosity and the crystallisation rate of the polymer. Differences in moulded part density may be evaluated according to ISO 1183-1; tensile properties may be compared according to ASTM D638-14 or ISO 527-2, but the test speed must be fixed in the report. Melt mass-flow rate according to ISO 1133-1:2022 should be measured before and after compounding to quantify degradation.
The minimum comparative test matrix for a drop-in evaluation may be assembled from the following points. Numerical acceptance limits are not included because they are formulation-specific.
| Evaluation point | Test method | Typical condition or equipment | What it detects |
|---|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | Extrusion plastometer; load and temperature fixed by resin | Viscosity shift versus incumbent |
| Tensile yield stress | ASTM D638-14 | Universal test machine; test speed fixed in report | Matrix wetting and filler-matrix adhesion |
| Charpy notched impact strength | ISO 179-1 | Pendulum impact tester; 2 mm notch | Brittle-ductile transition shifts |
| Flexural modulus | ISO 178 | Universal test machine; 2 mm/min test speed | Stiffness change at equal loading |
| Density | ISO 1183-1 | Immersion method or pycnometer | Lot consistency |
| Ash residue | ISO 3451-1 | Muffle furnace; temperature fixed by resin | Inorganic loading verification |
| Vertical burning classification | UL 94 | 125 mm × 13 mm specimen; thickness fixed by end use | Flammability classification |
All comparative data should be generated in the same laboratory session to avoid interlaboratory bias. If a property difference is observed, a second trial should be run at a fixed screw speed and throughput to confirm that the effect is material-related rather than process-related.
Compared with uncoated mineral fillers of similar particle size, surface-treated grades generally show lower equilibrium torque in internal mixers and lower compound viscosity at equal loading. This is a class effect and must not be interpreted as a measured property of WWJF-8011. Compared with brominated flame retardants, non-halogen systems may require higher addition levels and may reduce elongation at break; the formulation must be reoptimized rather than adjusted by direct replacement.
If the grade is proposed as a direct replacement for another product, the comparative data set should include melt viscosity by ISO 1133-1:2022, tensile properties by ASTM D638-14, notched impact by ISO 179-1, and the application-specific fire or electrical test. A direct drop-in equivalence cannot be established from the product code alone. The model designation WWJF-8011 may be accompanied by a lot-specific production date and internal specification revision; these identifiers should be recorded in the plant material database to control change. Downstream conversion differences may also appear in extrusion blow moulding or injection moulding because the additive affects extensional viscosity and melt strength. A capillary rheometer test according to ISO 11443 can provide shear viscosity data at processing temperatures; elongational behaviour is better assessed by extensional rheometry or by direct moulding trials. Where the application is near a property cliff-edge, such as a minimum notched impact requirement in a cold-climate specification, the use of a wide particle-size window can produce pass/fail variation even when the supplier lot is within published limits. If no supplier-comparative data are available for the intended matrix, the entry should be treated as a new material qualification rather than a substitution.
