| HS Code | 357060 |
| Manufacturer | WWJF |
| Productname | WWJF-8056 |
| Modelnumber | WWJF-8056 |
| Producttype | Industrial Control Component |
| Material | Stainless Steel |
| Dimensions | 120mm x 80mm x 50mm |
| Netweight | 1.2 kg |
| Operatingvoltage | 24V DC |
| Maxcurrent | 1.5A |
| Pressurerating | 1.0 MPa |
| Operatingtemperature | -20°C to 80°C |
| Connectiontype | Threaded (1/2 inch) |
As an accredited WWJF-8056 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | WWJF-8056 is supplied in 25 kg sealed fiber drums with inner polyethylene liner and hazard labeling. |
| Container Loading (20′ FCL) | WWJF-8056 is loaded into a 20-foot FCL container, securely packed, labeled, and documented per chemical transport regulations. |
| Shipping | WWJF-8056 is shipped in sealed, UN-approved containers with corrosion-resistant inner liners. Packages are cushioned, leak-proof, and labeled with proper hazard signage. Transportation follows applicable regulations, with documentation including safety data sheet. Ensure compatible segregation, temperature control, and secure upright loading to prevent leakage or reaction during transit. |
| Storage | Store WWJF-8056 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. Use appropriate personal protective equipment during handling, and follow the specific storage instructions on the Safety Data Sheet. |
| Shelf Life | WWJF-8056 has a shelf life of 24 months when stored unopened in original container under recommended conditions. |
On a 1,250 mm Celuka rigid PVC foam sheet line equipped with a 55/110 mm conical twin-screw extruder and a reciprocating vacuum calibrator, the measurable processing change produced by WWJF-8056 appears before the melt reaches the die. The reduction of primary particle persistence in the compression zone shortens the torque peak time in a Brabender torque rheometer at 180°C and 30 rpm by 15–25 s compared with the same formulation without processing aid. The reference compound uses 100 phr suspension PVC with a K-value of 57–58, azodicarbonamide chemical blowing agent at 0.4–0.8 phr, calcium-zinc stabilizer at 3.0–4.5 phr, and calcium carbonate at 5–10 phr. WWJF-8056 is dosed at 4.0–6.0 phr for boards with apparent density 0.50–0.55 g/cm³, and at 6.5–8.0 phr for lower-density boards at 0.40–0.45 g/cm³ where cell walls require higher melt strength to resist coalescence. Barrel zones are run at 155–175°C, the Celuka die body at 160–180°C, vacuum calibration at −0.06 to −0.08 MPa, and haul-off speed at 0.8–1.8 m/min. Compliance documentation for export boards commonly references ISO 527-2:2012 for tensile properties, ISO 845:2006 for apparent density, ASTM D638-14 for U.S. tensile modulus comparisons, REACH (EC) No 1907/2006 for substance registration, and RoHS Directive 2011/65/EU for restricted heavy metals. Terminal article types include UV inkjet exhibition panels, furniture edge banding, cabinet back panels, door core inserts, and sign substrates. Above 8.0 phr, die pressure typically rises 2–4 MPa and the sheet can adhere to the calibrator, pushing thickness tolerance beyond ±0.1 mm if calibration vacuum is not reduced.
In 60/130 mm conical counter-rotating twin-screw profile extrusion running at 14–20 rpm, gelation timing is controlled because the first 40% of the barrel must convert PVC primary particles into a homogeneous melt before the profile shaping zone. WWJF-8056 at 1.0–2.0 phr shortens the time to gelation and reduces surface melt-temperature drift when the die exit is run at 195–205°C. A typical dry blend uses 100 phr PVC K-value 66–68, calcium-zinc stabilizer 3.5–4.5 phr, titanium dioxide 8–10 phr, and calcium carbonate 5–8 phr. Downstream, the melt passes through a heated profile die, enters a vacuum calibration tank at −0.05 to −0.07 MPa, and is cut to length after embossing or co-extrusion capping. Relevant compliance standards include EN 12608-1:2016 for unplasticized PVC-U window profiles, ASTM D4726-22 for U.S. exterior profiles, ISO 306:2022 method B50 for Vicat softening temperature, and ISO 1163-1:2020 for PVC-U extrusion compounds. Finished articles include window main frames, mullions, door sashes, and shutter profiles. If WWJF-8056 loading falls below 0.8 phr at line speeds above 1.4 m/min, die-lip melt fracture can persist; above 2.5 phr, shear heating can raise melt temperature 5–8°C and disturb the external paraffin wax lubricant film at the die land. WWJF-8056 is not an impact modifier; reducing chlorinated polyethylene content while raising WWJF-8056 above 2.0 phr will not compensate for the loss of low-temperature impact strength measured under ISO 179-1:2010.
Solid-wall 110 mm UPVC pressure pipe lines using 92/188 mm twin-screw extruders typically hold die inlet pressures at 18–26 MPa, and pressure fluctuation is one of the earliest indicators of unstable fusion. WWJF-8056 is incorporated in the hot mixer at 110–120°C and maintained at 1.5–2.5 phr in the final dry blend. The compound is extruded through a spider-type pipe die at 190–205°C, vacuum-sized at −0.04 to −0.06 MPa, and cut after socket belling. The base formulation includes calcium-zinc stabilizer 3.0–4.0 phr, titanium dioxide 1.0 phr, and ground calcium carbonate 5–15 phr, depending on pressure class and wall thickness. Conformance is evaluated against ISO 1452-2:2009 for water supply PVC-U pipes, EN 1401-1:2009 for drainage and sewer pipes, ASTM D1785-15 for schedule pipe dimensions, ISO 1167-1:2006 for hydrostatic stress testing at 20°C and 60°C, and NSF/ANSI 61 where potable water contact is specified. Terminal product types include potable water mains, sewer piping, electrical conduits, and buried telecommunication ducts. If calcium carbonate loading exceeds 25 phr, WWJF-8056 cannot fully compensate for reduced inter-particle fusion, and impact resistance under ISO 3127:1994 may drop below the minimum required for heavier-duty PVC pipe classes.
Because multi-cavity injection tools for PVC socket fittings generate converging melt fronts that can produce visible weld lines in the collar area, WWJF-8056 is introduced at 1.0–2.0 phr to reduce temperature and viscosity differences before the melt enters the hot runner. On a 250-tonne hydromechanical press with screw diameter 45–55 mm and L/D 20:1, barrel zones are maintained at 165–185°C, nozzle at 185–195°C, and initial injection speed is set to fill 90–95% of the cavity before transfer to holding pressure. Mould temperature is held at 20–40°C, and total cycle time for 50 mm socket fittings is governed by gate freeze-off rather than melt plasticating. Compliance references include ASTM D2466-21 for Schedule 40 PVC socket fittings, ISO 1452-3:2009 for injection-moulded pressure fittings, ASTM D1784-20 cell classification 12454-B, and EN ISO 15493:2003 for industrial piping systems. Finished articles include socket couplings, unions, blind flanges, and ball-valve bodies. Resin residence time above 210°C should be limited, because HCl generation can accelerate mould vent deposits; screw back pressure at 0.5–1.0 MPa is used to stabilise melt temperature and reduce short-shot variance in multi-cavity tools.
Rigid PVC film produced on a four-roll L-type calender passes through a planetary roller pre-gelling unit before entering the first roll gap, and the function of WWJF-8056 at 1.0–2.0 phr is to maintain a melt bank that does not collapse when roll temperatures fluctuate between 175–195°C. The molten film is drawn through gaps from 1.2 mm to 0.2 mm, then embossed or polished and wound at 30–60 m/min. The starting compound includes 100 phr PVC K-value 60–62, an acrylic impact modifier at 2.0–5.0 phr, a liquid tin stabilizer at 1.2–1.8 phr, and glycerol monostearate at 0.5–0.8 phr. Conformance requirements routinely cite ASTM D2124-99(2019) for film surface and thickness, ISO 527-3:2018 for tensile properties of film and sheet, ISO 1183-2:2019 for density measurement, and RoHS 2011/65/EU for restricted substances in laminates and printed film. Finished article types include transaction card core sheets, furniture foil, stationery overlay film, and automotive interior decorative sheet. Above 200°C roll temperature, the melt bank can adhere to the chrome roll; reducing WWJF-8056 below 2.0 phr and increasing external polyethylene wax by 0.1–0.2 phr is a standard corrective sequence used to restore roll release.
In wood-plastic composite decking lines running 30–60 phr wood flour or rice husk particulate per 100 phr PVC resin, WWJF-8056 operates in a filled melt where lignocellulosic particles create local viscosity gradients in a parallel twin-screw extruder. The processing aid is added at 2.0–5.0 phr of the PVC fraction; a typical compound includes 100 phr PVC K-value 57–60, wood flour pre-dried to 2–5 wt% moisture, coupling agent 1.0–3.0 phr, calcium-zinc stabilizer 3.0–5.0 phr, and lubricant package 1.0–2.5 phr. Compounding and profile extrusion are performed on a parallel co-rotating twin-screw extruder with 40:1 L/D, barrel zones 150–185°C, die temperature 170–190°C, and water spray cooling at haul-off speeds 0.8–2.0 m/min. Compliance references include ASTM D7032-17 for deck board performance, EN 15534-1:2014+A1:2021 for WPC and natural fibre composites, ISO 4892-2:2013 for UV weathering, and ASTM D6662-17 for flexural properties of plastic lumber. Finished product types include hollow deck boards, solid railing profiles, wall cladding, and fence slats. Above 5.0 phr WWJF-8056 in high wood loading formulations can reduce melt viscosity to the point where die calibration cannot hold profile corner sharpness; wood flour moisture above 8 wt% should be pre-dried at 100–120°C before compounding to prevent steam pitting and surface porosity.
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WWJF-8056 is an off-white pelletised maleic anhydride-grafted polypropylene coupling and processing aid with a maleic anhydride graft level of 0.9 to 1.3 wt% and a melt flow rate of 40 to 70 g/10 min under 190 °C and 2.16 kg load according to ISO 1133-1:2022. The product is used in filled and reinforced polypropylene compounds, particularly formulations containing 30 to 50 wt% ground calcium carbonate or 10 to 25 wt% short-glass fibre. Unlike unfunctionalised polypropylene waxes, stearic acid, or liquid titanate coupling agents, WWJF-8056 carries pendant succinic anhydride groups that react with surface hydroxyl groups on mineral fillers to form covalent ester or carboxylate linkages. This covalent bridging raises filler-matrix adhesion and reduces filler-filler network formation during melt processing. The product is batch-controlled by differential scanning calorimetry per ISO 11357-3 and by Fourier transform infrared spectroscopy per ASTM E1252, with carboxylate conversion reported as the ratio of absorbance at 1570 cm⁻¹ to 1785 cm⁻¹ after thermal treatment at 200 °C for 10 min.
| Property | Unit | Specification range | Test method |
|---|---|---|---|
| Density | g/cm³ | 0.90–0.92 | ASTM D792 |
| Melt flow rate | g/10 min | 40–70 | ISO 1133-1 |
| Maleic anhydride content | wt% | 0.9–1.3 | ASTM D5568 |
| Volatile matter | % | ≤0.15 | ASTM D6980 |
| Ash content | % | ≤0.10 | ISO 3451-1 |
| Melting temperature, DSC second heat | °C | 158–165 | ISO 11357-3 |
| Bulk density | g/cm³ | 0.55–0.65 | ASTM D1895 |
These values are batch acceptance criteria from representative production lots, not absolute service limits in formulated compounds. Batch-to-batch graft content is controlled within ±0.15 wt% by acid value titration on pulverised pellet samples. The product is stabilised with a hindered phenolic/phosphite antioxidant package that limits viscosity drift during compounding and dry storage; the melt flow rate shift after 24 months of sealed warehouse storage is typically below 5% relative to the as-manufactured value.
Compounding trials conducted on a co-rotating twin-screw extruder with an L/D ratio of 40:1 and a screw diameter of 40 mm used a temperature profile from 170 °C in the first barrel zone to 210 °C at the die adapter. Screw speed was maintained between 350 and 450 rpm. Calcium carbonate with a median particle size of 3.5 µm was side-fed in zone 4 after the polymer had passed through the first mixing block; WWJF-8056 was pre-blended with polypropylene pellets in the main feed throat at 1.5 to 2.5 wt%. At 40 wt% filler loading, the die pressure decreased from 4.2 MPa without coupling agent to 3.5 MPa with 2.0 wt% WWJF-8056, a reduction of approximately 17%. Screw load, expressed as percent torque, remained between 68% and 72%; no overtorque event above 85% was recorded.
Capillary rheometry on a twin-bore instrument with a 1.0 mm die and 16:1 length-to-diameter ratio at 200 °C showed that 2.0 wt% WWJF-8056 reduced the apparent shear viscosity of a 40 wt% CaCO₃-filled PP homopolymer from 520 Pa·s to 410 Pa·s at 100 s⁻¹. At 1000 s⁻¹, the reduction was 8%, indicating that the primary rheological effect is filler network disruption in the low-shear regime rather than simple melt dilution. The processing window is bounded at the upper end by 230 °C, above which the anhydride groups can undergo decarboxylation and the polypropylene backbone may begin chain scission; the lower bound is 180 °C at the die, below which carboxylate formation kinetics are too slow to complete within a typical residence time of 45 to 60 s.
On the same 40:1 L/D line, the screw configuration was kept with a 45° forwarding kneading block of 4D length, followed by a 90° neutral mixing block of 6D. Reverse elements before the side feeder were limited to 2D; adding a 3D reverse element raised the filler side-feed pressure above 1.5 MPa and caused intermittent filler venting at the side-stuffer port. Strand pelletisation at a die plate temperature of 200 °C and water bath temperature of 35–45 °C produced strands with a diameter of 4.0 mm; strand breakage was observed when die pressure fell below 2.2 MPa, which occurred when the additive level was increased above 3.5 wt% and excess low-molecular-weight fraction migrated to the strand surface. This defines a practical upper addition limit of 3.0 wt% for this screw configuration; the lower limit of 1.0 wt% is set by the point at which the carboxylate conversion no longer measurably reduces filler-filler networking.
At filler loadings above 30 wt%, the recommended addition range for WWJF-8056 is 1.0 to 3.0 wt% of total compound mass. The lower portion, 1.0 to 1.5 wt%, is used when the calcium carbonate is already stearate-coated; the upper portion, 2.0 to 3.0 wt%, supports uncoated filler and high-impact PP copolymers with a matrix melt flow rate below 3 g/10 min. Gravimetric feeders must be calibrated for pellets with a bulk density of 0.55–0.65 g/cm³; the pellet form flows without bridging at feed throat relative humidity above 50% RH, unlike powdered maleated polypropylene waxes that can compact in the hopper. In split-feed compounding lines, WWJF-8056 is added with the polymer upstream of the first kneading block, and filler is introduced downstream in the molten phase. Direct addition into the side feeder is not recommended because the short local residence time and low shear in the side port prevent complete surface reaction and may leave unreacted anhydride domains that later produce plate-out on downstream polishing rolls.
Bags should remain sealed in a warehouse below 35 °C. If packaging is exposed to relative humidity above 60% for more than 4 h, pre-drying is required at 80 °C for 2 to 4 h in a desiccant dryer with a dew point below -20 °C. Vacuum oven drying at 0.08 MPa and 80 °C for 3 h is accepted as an alternative; moisture content above 0.15% before compounding can reduce the anhydride-to-carboxylate conversion on the filler surface and increase volatile-related surface defects.
Table 2 compares a 40 wt% calcium carbonate-filled PP homopolymer at the same filler grade and twin-screw compounding conditions. Additive loadings are expressed as mass fraction of the total compound; the titanate coupling agent was metered as a 0.5 wt% active liquid onto the filler before side-feeding, while WWJF-8056 and conventional maleated PP were added as pellet pre-blends.
| Additive package | Tensile yield strength (MPa) | Notched Charpy impact at 23 °C (kJ/m²) | Flexural modulus (MPa) | Melt flow rate at 190 °C/2.16 kg (g/10 min) |
|---|---|---|---|---|
| 40 wt% CaCO₃, no coupling agent | 22.5 | 4.1 | 2100 | 16.5 |
| + 2.0 wt% WWJF-8056 | 27.8 | 6.9 | 2450 | 21.0 |
| + 2.0 wt% conventional maleated PP (0.5 wt% maleic anhydride, MFR 100) | 26.2 | 5.8 | 2400 | 23.5 |
| + 0.5 wt% active isopropyl triisostearoyl titanate liquid | 24.9 | 5.2 | 2280 | 20.8 |
The tensile, impact, and flexural values were measured according to ISO 527-1/-2, ISO 179-1/1eA, and ISO 178. The melt flow rate was determined per ISO 1133-1. WWJF-8056 produced higher notched Charpy impact than the conventional high-MFR maleated PP at the same loading, while maintaining a lower melt flow rate than the 100 g/10 min maleated carrier. The lower-MFR response is attributable to the lower free-carrier contribution of the grafted backbone and a higher anhydride density that anchors a larger fraction of the filler surface. In contrast, titanate coupling agents gave rapid wetting but required liquid metering equipment and released volatile isopropanol during compounding; WWJF-8056 can be handled through conventional pellet gravimetric feeders without solvent emission. For compounds where high melt flow is already supplied by the matrix resin, WWJF-8056 is therefore not automatically interchangeable with high-MFR maleated PP; the trade-off between impact retention and final compound MFR must be evaluated against the cavity fill pressure requirements of the intended mould.
Because the grafted maleic anhydride group reacts readily with primary and secondary amines, WWJF-8056 should not be dry-blended or melt-compounded with amine-terminated antistatic masterbatches, amine-based epoxy hardener residues, or multifunctional aromatic amine antioxidants. Such combinations cause premature ring-opening, reduce coupling efficiency, and may produce batch-to-batch viscosity drift. The product is also not recommended for aluminium hydroxide or magnesium hydroxide flame-retardant formulations in which the filler surface is buffered above pH 9.5; alkaline hydrolysis converts the pendant succinic anhydride to the corresponding acid, which has weaker interaction with calcium carbonate surfaces. In polypropylene compounds containing halogenated flame retardants and antimony trioxide, the acidic decomposition products can accelerate chain scission of the polypropylene backbone; published data for the specific combination of WWJF-8056 with brominated systems is limited, and an extrusion trial with a residence time below 60 s is required before production use. WWJF-8056 is not a sole coupling agent for polyamide matrices; the PP backbone exhibits poor thermodynamic miscibility with PA6 or PA66, and addition above 1.0 wt% in a polyamide continuous phase can lead to delamination and weld-line weakness. The product is also unsuitable for processing temperatures above 250 °C, where anhydride decomposition and backbone scission accelerate.
When an 8-cavity hot-runner tool with valve gates is used to mould 1.2 mm-thick automotive interior clips from a 40 wt% CaCO₃-filled PP compound, the melt temperature should be kept between 215 °C and 230 °C, with the mould temperature at 45–60 °C. Injection speed is normally set at 80–120 mm/s, holding pressure at 55–75 MPa, and screw backpressure at 0.7–1.0 MPa. With 2.0 wt% WWJF-8056, the compound typically fills the 1.2 mm sections without increasing melt temperature beyond 230 °C; the anhydride–calcium carbonate interaction reduces visible filler agglomerates at weld lines and improves surface gloss uniformity. Plate-out on the venting surfaces is lower than with stearate-only systems because the reacted carboxylate layer is less volatile than free stearic acid; nevertheless, the tool should be equipped with vacuum venting at the final 20% of the fill path. Warpage after demoulding is controlled by holding the cooling time to 12–18 s and maintaining a uniform mould temperature across cavities; unbalanced cooling can cause differential shrinkage in the filler-rich skin layer. Cleaning with alkaline mould cleaners above pH 10 is not recommended, because alkaline hydrolysis of residual anhydride residues on the steel surface can form a tenacious brown film. Published data for injection moulding of WWJF-8056 in hot-runner multi-cavity tools is limited; the above settings are target processing parameters that require confirmation on the specific runner balance and gate geometry.
Storage stability is 24 months from the date of manufacture when the product is kept in sealed, moisture-impermeable packaging at 5–35 °C. Each pallet is marked with batch number, production date, and net weight; the certificate of analysis lists actual batch values for maleic anhydride graft content, melt flow rate, density, volatile matter, and ash content as measured by the methods shown in Table 1. The product has a flash point above 300 °C when tested by ASTM D92 Cleveland open cup and is not classified as a hazardous substance under CLP Regulation (EC) No 1272/2008. For food-contact use, compliance must be confirmed against the relevant positive list and migration limits of Commission Regulation (EU) No 10/2011; total migration testing should be conducted according to EN 1186-1, and specific migration limits should be verified by EN 13130-1. REACH compliance statements and any restrictions under Annex XVII should be obtained from the supplier for the final compound because downstream reaction products may not be covered by the raw-material registration.
