| HS Code | 836949 |
| Vinyl Acetate Content | 18 wt% |
| Density | 0.938 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 2.0 g/10 min |
| Melting Point | 84 °C |
| Vicat Softening Point | 59 °C |
| Tensile Strength At Break | 22 MPa |
| Elongation At Break | 800% |
| Shore A Hardness | 85 |
| Brittleness Temperature | -70 °C |
| Glass Transition Temperature | -20 °C |
As an accredited EVATHENE UE33002 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVATHENE UE33002 EVA copolymer is packaged as free-flowing pellets in 25 kg multi-ply paper bags for safe handling and storage. |
| Container Loading (20′ FCL) | EVATHENE UE33002 Ethylene Vinyl Acetate Copolymer is shipped in a 20′ FCL using clean, dry containers, secured with dunnage and adequate ventilation. |
| Shipping | EVATHENE UE33002 (EVA copolymer) ships as non-hazardous solid pellets in multi-layer paper bags or bulk containers. Avoid moisture, heat, and direct sunlight; store in a cool, dry warehouse. Keep away from ignition sources and incompatible oxidizers. Use clean, dry equipment to prevent contamination and maintain product integrity during transport. |
| Storage | Store EVATHENE UE33002 in a cool, dry, well-ventilated area, away from heat, open flames, and direct sunlight. Keep containers tightly sealed to prevent moisture absorption and contamination. Maintain temperatures below 30°C (86°F) to avoid blocking or degradation. Use within 12 months of receipt under proper conditions. Ensure good housekeeping to minimize dust accumulation and static discharge risk. |
| Shelf Life | Shelf life is typically 2 years when stored in a cool, dry place away from direct sunlight and moisture. |
In medium-voltage cable shield compounding, the selection of a 33 wt% vinyl acetate, 2.0 g/10 min melt flow rate EVA base resin is governed by the requirement for low crystallinity and high carbon-black acceptance. EVATHENE UE33002 is compounded at 100 phr with 60–80 phr acetylene carbon black, 0.3–0.8 phr hindered phenolic antioxidant, 1.0–3.0 phr processing lubricant, and, when a bonded crosslinked shield is specified, 1.5–2.5 phr dicumyl peroxide. Amine-based additives are excluded because they accelerate dicumyl peroxide decomposition and produce premature scorch. The mixing sequence on a Banbury-type internal mixer runs at 40–60 rpm with ram pressure maintained between 0.20 and 0.35 MPa; batch discharge is controlled at 145–150 °C to avoid heat history beyond the peroxide kinetic threshold. A single-screw extruder with an L/D ratio of 20:1–24:1 and a 60/80/100 mesh screen pack delivers melt at 110–125 °C to a crosshead die. The co-extruded conductor shield at 0.10–0.15 mm thickness and insulation shield at 0.15–0.25 mm thickness are cured in a continuous vulcanization tube at 1.0–1.2 MPa nitrogen pressure and 260–320 °C zone temperatures. Field experience on production lines shows that variation in carbon black oil absorption beyond ±5 mL/100 g causes surface roughness defects greater than 20 µm on extruded shield tape samples. Compliance is assessed under ASTM D3004-17 for extruded semiconductive thermoset materials, IEC 60502-2 for medium-voltage power cable construction, and RoHS Directive 2011/65/EU restrictions on lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE in cable components. Finished cable types include 6/10 kV, 8.7/15 kV, and 19/33 kV medium-voltage power cables with bonded semiconductive screens.
Hot-melt adhesive granulation lines for edge banding and profile wrapping use EVATHENE UE33002 at 20–35 wt% of the finished formulation, combined with 30–45 wt% hydrogenated C9 tackifier, 5–15 wt% Fischer-Tropsch wax, 0.5–1.0 wt% antioxidant, and 0–15 wt% calcium carbonate filler. The resin’s 33 wt% vinyl acetate content lowers the cohesive failure temperature of semi-crystalline ethylene segments and provides peel adhesion to rigid PVC edge banding substrates when the adhesive is applied at 170–185 °C using a slot-die coater with a coating weight of 60–120 g/m². Mixture viscosity at 180 °C is controlled to 5,000–12,000 mPa·s when measured on a Brookfield RVT thermocell according to ASTM D3236-15, and the ring-and-ball softening point is adjusted to 90–110 °C under ASTM E28-99. Production of the granulate is carried out on a co-rotating twin-screw extruder with 44:1 L/D, screw speed 300–500 rpm, and barrel temperature profile 120/140/160/175/170 °C; underwater pelletizing at 8–12 °C water temperature prevents pellet agglomeration during post-crystallization. Compliance for food-contact packaging adhesives is established under FDA 21 CFR 175.105, which covers adhesives used in articles that contact food, and the resin and finished compound are subject to REACH Regulation (EC) No 1907/2006 Annex XVII restrictions on substances of very high concern. Terminal finished product types include hot-melt adhesive granules for edge banding of PVC and ABS furniture components, profile wrapping adhesives for door and window profiles, automotive interior laminating adhesives for PVC skin to ABS or polyolefin foam cores, and bookbinding spine adhesives where long open time is not required.
For closed-cell gaskets and expansion joint profiles, EVATHENE UE33002 is compounded at 100 phr resin with 2.0–4.0 phr azodicarbonamide, 0.8–1.5 phr dicumyl peroxide, 1.0–2.0 phr zinc oxide, 0.3–0.7 phr zinc stearate, and 10–25 phr talc or calcium carbonate. The role of zinc oxide is to lower the gas-release window of azodicarbonamide from approximately 205–215 °C to 150–175 °C, allowing simultaneous peroxide crosslinking and blowing. Mixing is performed in an internal kneader at 90–100 °C, followed by two-roll mill homogenization at 75–85 °C with a nip gap of 0.8–1.2 mm; the mixed sheet is then extruded as a preform and expanded in a continuous hot-air oven with residence times of 8–12 min at 190–220 °C. Foam density is controlled between 60–150 kg/m³, and compression set is measured after 22 h at 70 °C according to ISO 7214:2019 or ASTM D1056-14. Industrial lines producing HVAC gaskets report that a ±3 °C deviation in oven temperature during the first 2 min of expansion can increase density variation by ±10 kg/m³ across the sheet width. Compliance for automotive interior and building insulation foam includes ASTM D1056-14 classification 2C2 for closed-cell cellular materials, FMVSS 302 for flammability of automotive occupant compartments, and REACH Regulation (EC) No 1907/2006 Annex XVII restrictions on specific regulated substances. Terminal finished products include pipe insulation tubes with 13–32 mm wall thickness, HVAC flange gaskets with Shore 00 hardness 35–55, construction expansion joint boards, and shock-absorbing underlay sheets for laminate flooring.
Acoustic damping sheets produced on inverted-L calenders use EVATHENE UE33002 as the polymer matrix for high-density mineral fillers, with barium sulfate loading at 250–350 phr or 70–85 wt% of the finished compound, calcium carbonate at 50–100 phr, processing oil at 5–10 phr, and hindered phenolic antioxidant at 0.5–1.0 phr. The high vinyl acetate content permits filler wetting without a separate coupling agent, although 0.3–0.8 phr zinc stearate is used as an internal release agent and viscosity modifier. Damping performance of the 2.0–5.0 mm calendered sheet is evaluated as the loss factor under ASTM E756-05 over the 20–250 Hz frequency range, with typical tan δ values of 0.25–0.45 at 23 °C and 0.30–0.55 at 50 °C when measured by ISO 6721-4:2019 in tensile mode. The processing sequence includes internal mixing at 115–135 °C, transfer to a two-roll mill with front roll temperature 90–100 °C, and calendering to 2.0–5.0 mm thickness with tolerance ±0.15 mm. Production-scale difficulty arises when filler moisture content exceeds 0.1 wt%, causing steam blistering at the sheet surface; therefore, pre-drying of barium sulfate at 105–120 °C for 4–6 h is required when ambient relative humidity is above 60%. Compliance for automotive interior applications references VDA 278:2011 for VOC and fogging behavior, FMVSS 302 for flammability, and IMO FTP Code Annex 3 for marine floor coverings. Terminal products include automotive dash silencers, floor pan damping mats, trunk side trim damping pads, marine deck underlay, and construction floating floor acoustic membranes.
Polymer-modified bitumen production for waterproofing membranes uses EVATHENE UE33002 at 3–8 wt% of the total binder, with the bitumen preheated to 170–185 °C and mixed under a high-shear Silverson-type rotor-stator disperser at 2,500–3,500 rpm for 3–5 h. The 33 wt% vinyl acetate content provides polar interaction with asphaltenes and reduces the glass-transition onset of the polymer-rich phase, while the 2.0 g/10 min melt flow rate requires high shear rather than simple paddle mixing to achieve a continuous polymer network in oxidized bitumen. A typical formulation for a torch-applied SBS-free membrane includes 60–70 wt% oxidized bitumen, 20–30 wt% limestone filler, 3–8 wt% EVA, and 0.3–0.8 wt% release agent; the compound is coated onto a 150–200 g/m² glass-fiber or polyester carrier at 150–160 °C and cooled on a water-cooled drum. Compliance for the finished membrane is established under EN 13707:2004+A2:2009 for reinforced bitumen sheets for waterproofing, ASTM D1187/D1187M-16 for polymer-modified bituminous sheet materials, and EN 14023:2010 for specifications of modified bitumen. Terminal finished products include torch-applied and self-adhesive waterproofing membranes for flat roofs, below-ground tanking, bridge deck membranes, and tunnel lining protection. Production records show that phase separation in storage tanks is less than 2 wt% after 72 h at 180 °C when the EVA content is kept below 8 wt% and mixing intensity remains above 3,000 rpm.
Compounding of EVATHENE UE33002 into halogen-free flame-retardant sheathing starts with 100 phr resin, 150–200 phr alumina trihydrate, 10–40 phr magnesium dihydroxide, 10–20 phr zinc borate, 1.0–3.0 phr organosilane coupling agent, and 1.0–2.0 phr antioxidant. The high vinyl acetate content improves filler dispersion by increasing matrix polarity, but the melt viscosity at low shear imposes a 40:1 L/D co-rotating twin-screw extruder with distributive mixing elements; barrel temperatures are profiled at 120/140/155/170/165/160/155 °C, screw speed at 250–400 rpm, and die pressure kept below 12 MPa to avoid water release from alumina trihydrate. The resulting compound is then extruded onto cable cores on a single-screw extruder with a compression ratio of 2.5:1 and a water-cooled screw, using screen packs of 20/40/60 mesh and a melt temperature of 150–165 °C. Compliance is verified under IEC 60332-1-2 for single vertical wire flame propagation, IEC 61034-2 for smoke density with light transmittance no less than 60%, IEC 60754-2 for halogen acid gas content not exceeding 0.5% by mass, and ISO 4589-2:2017 for limiting oxygen index typically 34–38%. Terminal finished products include 0.6/1 kV building wires, control cables for railway signaling, photovoltaic system DC cables, and marine cables where IACS UR E11 requires low smoke and toxicity characteristics. Production-scale batch records show that filler moisture above 0.12 wt% causes porosity in the sheath insulation and reduces flame retardancy; therefore, alumina trihydrate is pre-dried at 90–100 °C for 6–8 h when silo storage humidity exceeds 50%.
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EVATHENE UE33002 is an ethylene vinyl acetate (EVA) copolymer grade supplied by USI Corporation for hot-melt adhesive, sealant, compounding, and polymer-modification operations. The grade is characterized by a nominal vinyl acetate content of 33 wt% and a melt mass-flow rate of 2.0 g/10 min when determined at 190 °C under a 2.16 kg load in accordance with ASTM D1238. The high vinyl acetate fraction reduces crystalline order relative to lower-VA EVA grades, shifting the balance toward low-temperature flexibility, surface polarity, and adhesion. Table 1 lists typical manufacturer-published values; these are not contractual specification limits and must be verified against the lot-specific certificate of analysis for release decisions.
| Property | Test method | Unit | Typical value | Condition |
|---|---|---|---|---|
| Vinyl acetate content | ASTM D5594 | wt% | 33 | FTIR |
| Melt mass-flow rate | ASTM D1238 / ISO 1133-1 | g/10 min | 2.0 | 190 °C, 2.16 kg |
| Density | ASTM D1505 / ISO 1183-1 | g/cm³ | 0.95 | 23 °C |
| Shore A hardness | ASTM D2240 | — | 80 | 15 s |
| Tensile strength at break | ASTM D638 | MPa | 12 | Type IV, 500 mm/min |
| Elongation at break | ASTM D638 | % | 750 | Type IV, 500 mm/min |
| Vicat softening point | ASTM D1525 | °C | 45 | Load 10 N, rate 50 °C/h |
| DSC melting peak | ASTM D3418 | °C | 63 | 10 °C/min, second heat |
The alphanumeric grade designation is consistent with a nominal vinyl acetate content of 33 wt%, while the final digits indicate the melt-flow class. Compounding operations should not infer rheological behavior from vinyl acetate content alone because molecular weight distribution and long-chain branching also influence die pressure, melt strength, and draw resonance.
The vinyl acetate units disrupt ethylene crystallinity, lowering the crystalline melting peak to approximately 63 °C as measured by differential scanning calorimetry per ASTM D3418. Lower-VA grades of equivalent melt-flow class, such as an 18 wt% VA EVA, typically show a melting peak closer to 84 °C. The same structural difference lowers the Vicat softening point to approximately 45 °C per ASTM D1525 and reduces Shore A hardness to approximately 80 per ASTM D2240. In the melt, the 2.0 g/10 min MFR positions the grade in the higher-viscosity region of the EVA product family; this is useful in cast-film and profile extrusion where melt strength contributes to gauge uniformity, but it also raises torque and melt-temperature generation in high-speed compounding.
Dynamic oscillatory rheology at 190 °C shows that a 33 wt% VA EVA with MFR 2.0 retains higher storage modulus and loss modulus at low frequency than a 33 wt% VA grade with MFR 25. Extensional viscosity and melt strength are greater, which is relevant in slot-die extrusion and foaming operations where bubble stability and cell coalescence are governed by melt elasticity. Capillary rheometry data may be generated using ASTM D3835; apparent shear viscosity at 100 s⁻¹ is commonly used as a quality-control reference, but published data for this specific grade is limited unless the converter establishes internal SPC limits.
At compounding temperatures between 150 °C and 180 °C, shear thinning of the EVA melt reduces viscosity under high-shear screw elements. However, the same acetate functionality that imparts polarity undergoes thermal elimination at elevated temperature. Published degradation studies for EVA copolymers in the 28–33 wt% VA range place the onset of detectable acetic acid evolution above approximately 200 °C; the rate accelerates sharply above 220 °C. Batch-to-batch MFR variation of ±0.3 g/10 min can shift the observed melt temperature on a filled profile line by several °C, so melt-temperature monitoring at the adapter is more informative than barrel set-point control alone.
On a production-scale co-rotating twin-screw extruder with an L/D 44:1 barrel, the recommended temperature profile for filled or tackified compounds starts at 120 °C in the feed zone and rises to 180 °C at the adapter and die. Melt temperature should remain below 220 °C to keep deacetylation within tolerable limits. A vent port connected to a vacuum pump is typically maintained at -0.08 MPa or lower to strip moisture and residual acetic acid; failure to maintain vacuum produces splay, pellet porosity, and odour. Screw speed is generally set between 200 and 400 rpm depending on feeder accuracy and the presence of shear-sensitive tackifiers, while specific energy is controlled by throughput and restrictive mixing elements. On the same 44:1 L/D line, melt temperature measured at the die is often 15–25 °C higher than the barrel set point due to viscous dissipation. This offset is more pronounced in filled systems than in neat resin and must be accounted for when setting zone temperatures.
High-shear dispersion of fillers such as calcium carbonate or fumed silica in UE33002 requires careful control of screw configuration. Two-lobe kneading blocks followed by reverse conveying elements improve distributive mixing, but excessive specific energy triggers deacetylation. The acetate ester is also susceptible to nucleophilic attack by strongly basic species. Compounding with amine-based antistatic packages or certain amine-cured epoxy masterbatches should be avoided unless specifically validated, because the interaction can accelerate chain scission and shift MFR upward during extended hold times.
In hot-melt adhesive applications, EVATHENE UE33002 is usually combined with hydrocarbon or rosin ester tackifiers, paraffin or Fischer-Tropsch waxes, and a hindered phenolic antioxidant. The high vinyl acetate content improves wetting of polar substrates such as corona-treated polypropylene, aluminum, and coated paperboard. Adhesive performance should be evaluated using ASTM D1876 T-peel and ASTM D4498 or ASTM D3163 lap-shear methods at the intended service temperature; a single adhesion value is not assignable because tackifier loading, substrate surface energy, and coating weight dominate the result. Open time and set speed are controlled by wax type and loading rather than by the EVA grade alone. High-VA grades typically extend open time in hot-melt systems because the polar acetate groups interact with tackifier resins and slow crystalline network formation. For laminating operations, ASTM D1876 T-peel specimens should be conditioned at 23 °C and 50% RH for at least 24 h before testing to reduce variability.
| Property | Test method | EVATHENE UE33002 | 18 wt% VA EVA, MFR 2.0 | 33 wt% VA EVA, MFR 25 |
|---|---|---|---|---|
| Vinyl acetate content | ASTM D5594 | 33 wt% | 18 wt% | 33 wt% |
| Melt mass-flow rate | ASTM D1238 | 2.0 g/10 min | 2.0 g/10 min | 25 g/10 min |
| Shore A hardness | ASTM D2240 | 80 | 94 | 72 |
| DSC melting peak | ASTM D3418 | 63 °C | 84 °C | 62 °C |
| Vicat softening point | ASTM D1525 | 45 °C | 65 °C | 42 °C |
| Tensile strength at break | ASTM D638 | 12 MPa | 20 MPa | 6 MPa |
| Elongation at break | ASTM D638 | 750% | 700% | 600% |
When this grade replaces an 18 or 28 wt% VA EVA in an existing formulation, the formulator should expect a reduction in elevated-temperature shear resistance. Heat-fail temperature measured per ASTM D4498 may decrease by approximately 10–20 °C unless the wax package or crosslinking strategy is adjusted. In peroxide-cured sealant systems, the higher VA content increases polarity and may alter peroxide-cure kinetics; bench-scale oscillating-disk rheometry per ASTM D2084 or a moving-die rheometer per ISO 6502 should be used to compare scorch time and torque. Published data for this specific formulation configuration is limited.
Compared with ethylene ethyl acrylate or ethylene methyl acrylate copolymers of similar comonomer content, UE33002 offers different thermal stability and polarity. The acetate ester in EVA is more thermally labile than acrylate esters, so the upper processing temperature is lower. Formulators selecting between these copolymers must weigh the higher polar contribution of vinyl acetate against the thermal stability and low-temperature performance of acrylate copolymers. The choice is normally based on comparative thermogravimetric onset data, MFR, and peel-adhesion values generated under identical conditions rather than on nominal comonomer content alone.
Polymer modification of bitumen used in waterproofing membranes and road paving requires melt blending at 170–190 °C in high-shear mixers. The 33 wt% VA content improves compatibility with polar asphaltene fractions and raises low-temperature flexibility. Dynamic shear rheometer measurements in temperature sweep mode following ASTM D7175 are used to monitor complex shear modulus and phase angle. At loading levels of 3–5 wt% EVA, the phase angle at high service temperature can shift by several degrees; however, published data for this specific grade in bitumen is limited.
Because the acetate ester undergoes thermal elimination and hydrolysis, the grade should be pre-dried at 60 °C for 4 h in a desiccant dryer when storage relative humidity exceeds 60%. Molten resin should not remain in hot-melt tanks at 180 °C for more than 8 h without a nitrogen blanket; longer hold times can shift viscosity through deacetylation and oxidation. Strongly basic or amine-based additive packages should be avoided unless validated by MFR retention and yellowness index testing per ASTM E313. Contact with copper alloys in molten handling equipment should be avoided because the released acetic acid is corrosive. Compliance with food-contact frameworks such as FDA 21 CFR 177.1350 or EU 10/2011 must be confirmed for the finished article and additive package; the base resin composition alone does not guarantee compliance. The grade is not recommended for unsupported thin film below 50 μm without anti-block because blocking tendency increases with VA content.
