| HS Code | 738848 |
| Product Name | Hanwha EVA 2020 |
| Manufacturer | Hanwha Chemical |
| Material Type | Ethylene Vinyl Acetate (EVA) Copolymer |
| Vinyl Acetate Content | 20% |
| Melt Flow Index | 20 g/10 min (190°C/2.16 kg) |
| Density | 0.945 g/cm³ |
| Melting Point | 80°C |
| Vicat Softening Point | 55°C |
| Tensile Strength At Break | 12 MPa |
| Elongation At Break | 680% |
| Hardness Shore D | 40 |
| Brittleness Temperature | -70°C |
| Typical Applications | Hot melt adhesives, compounding, masterbatch |
As an accredited HANWHA EVA 2020 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 2020 is supplied as pellets in 25 kg multi-layer paper bags on pallets, wrapped with stretch film. |
| Container Loading (20′ FCL) | 20′ FCL: HANWHA EVA 2020 in 25 kg bags, palletized and stretch-wrapped, loaded securely for safe transport. |
| Shipping | HANWHA EVA 2020 (ethylene-vinyl acetate copolymer resin) ships as non-hazardous plastic pellets in 25 kg bags, palletized and stretch-wrapped for container loading. Keep containers dry, ventilated, and protected from heat/UV. No dangerous goods declaration required; handle with standard material handling equipment to prevent bag damage. |
| Storage | Store HANWHA EVA 2020 in a cool, dry, well-ventilated area away from direct sunlight, ignition sources, and oxidizers. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid high humidity and temperatures above 40°C. Good housekeeping minimizes dust accumulation, which can form combustible mixtures in air. |
| Shelf Life | Shelf life: 24 months from manufacture date when stored in original, unopened packaging in a cool, dry place. |
Hanwha EVA 2020 is a 20 wt% vinyl acetate content ethylene-vinyl acetate copolymer with a melt index of 2.0 g/10 min under ASTM D1238 at 190°C/2.16 kg. The downstream application scenarios below are limited to processing routes where this viscosity and VA content are matched to filler acceptance, low-temperature flex, and controlled melt strength.
In compression-molded footwear midsole production, EVA 2020 is dry-blended with azodicarbonamide (ADC), dicumyl peroxide (DCP), zinc oxide, calcium carbonate, and stearic acid in a high-speed mixer before being dispersed on a two-roll mill at 100–115°C or in an internal mixer. The 20 wt% vinyl acetate content reduces polyethylene crystallinity and permits a foaming plateau between 168°C and 182°C; below this range, ADC residues remain and cell coalescence occurs, while above this range, surface blowholes and internal splits increase. The compound is sheeted, pre-cut to mold coverage, and crosslinked and blown simultaneously in a compression press. Starting-point formulation ranges for a 0.20–0.24 g/cm³ midsole compound are 2.8–3.6 phr ADC, 0.7–1.0 phr DCP, 10–20 phr calcium carbonate, 1.0–2.0 phr zinc oxide, and 0.5–1.0 phr stearic acid.
| Target foam density | Azodicarbonamide | Dicumyl peroxide | Calcium carbonate | Mold temperature | Cycle time for 10 mm sheet |
|---|---|---|---|---|---|
| 0.15 g/cm³ | 4.0 phr | 0.8 phr | 10 phr | 175°C | 8 min |
| 0.20 g/cm³ | 3.2 phr | 0.8 phr | 15 phr | 175°C | 9 min |
| 0.25 g/cm³ | 2.5 phr | 0.8 phr | 20 phr | 175°C | 10 min |
On production presses, the mold platens must be maintained within ±3°C; a temperature gradient across the cavity produces density variation of up to 0.03 g/cm³ between rim and center. Demolding too early causes permanent set because the EVA network creep is high until the core temperature falls below 60°C. The same compound design is used for unit soles and sandal sheets, but pressing pressure is reduced by 20–30% for thin sheets to avoid internal shear cracks. Density is measured by ISO 845, split tear by ISO 6383-1, and rebound by DIN 53512. REACH (EC) No 1907/2006 applies; the formulation avoids phthalate plasticizers and heavy-metal pigments. Terminal products from this route are midsoles, unit soles, sandal sheets, and flip-flop bases.
Sheet extrusion with EVA 2020 is run on a single-screw extruder with a 30:1 L/D ratio and a barrier screw. The temperature profile is set from 150°C at the feed throat to 190°C at the adapter and die. Chill roll temperatures of 50–70°C are used for thicknesses between 0.5 mm and 3.0 mm; the lower roll temperature is reserved for thin films to prevent blocking. The 20 wt% vinyl acetate content gives sheet a low-temperature flexural modulus and permits thermoforming at a sheet-surface temperature of 120–140°C. Draw ratios above 3:1 require plug assist; unassisted forming produces corner thinning above 40% on parts deeper than 50 mm. Antiblock masterbatch is added at 0.1–0.3 wt% and slip agent at 0.05–0.15 wt% for stack operations. Sheet can be coextruded with a higher-VA skin for hot-seal lamination to fabrics or nonwovens. Under U.S. FDA 21 CFR 177.1350, the finished sheet falls under that regulation when extractives are controlled within the specified total non-volatile extractables limits. Recycled EVA 2020 sheet trims up to 20% can be re-introduced into the sheet line if the regrind is dried at 70°C for 3 h and screened through a 3 mm mesh; higher reuse levels reduce melt strength and disturb web stability at the die. Tensile properties are measured by ASTM D638-14 or ISO 527-2, and density by ISO 1183-1. Terminal products include technical packaging, shoe counters, protective equipment cases, and interior panels.
For halogen-free flame-retardant sheath compounds, EVA 2020 is used as the base resin because the polar vinyl acetate co-monomer provides higher affinity for alumina trihydrate (ATH) than LDPE. ATH is loaded in a Banbury internal mixer or a co-rotating twin-screw extruder with a 44:1 L/D ratio. The screw configuration uses two kneading zones and a low-shear discharge to limit shear heating. Typical filler loadings are 120–180 phr ATH with a median particle diameter of 1.3–2.0 µm and 1.0–2.0 phr vinyl silane coupling agent. At loadings above 180 phr, melt pressure at the die may rise above 180 bar and surface melt fracture appears as herringbone marks on the sheath. Antioxidant packages are selected for long-term heat ageing at 110°C for 7 days under IEC 60811-401. The limiting oxygen index is measured under ISO 4589-2 and single-wire vertical flame under IEC 60332-1-2. The finished compound is extruded on a 60 mm or 90 mm single-screw extruder with a 25:1 L/D ratio and a PE screw. The temperature profile from hopper to head is 130°C to 170°C, and tooling pressure is kept below 150 bar. Pre-drying of the compound is required at 75–80°C for 4 h when storage relative humidity exceeds 60%. The technical limitation is the reduction in tensile strength at filler loadings above 160 phr; elongation at break falls below 180%, which can fall below the minimum tensile elongation values specified in halogen-free cable sheath standards. Terminal products include low-smoke zero-halogen sheathing for industrial flexible cables, marine cables, and control cables.
Color and additive masterbatches where the let-down resin is polyolefin-based use EVA 2020 as a carrier because its 20 wt% vinyl acetate content increases pigment wetting without the shear sensitivity of low-MI PE wax blends. A typical color or additive masterbatch formula contains 40–60 wt% EVA 2020, 30–50 wt% pigment or filler, and 5–10 wt% wax dispersion aid. The ingredients are pre-mixed in a high-speed mixer to a bulk temperature of 60°C and compounded in a co-rotating twin-screw extruder with a 40:1 L/D ratio at 160–200°C. Vacuum devolatilisation at -0.08 MPa is applied in the downstream vent zone to remove low-molecular-weight volatiles. The pellets are cut by underwater or strand pelletising and must not exceed 4.0 mm length to avoid feeding defects in thin-wall injection molders. Quality control includes pressure screen tests on cast film lines; a 300 µm screen pack rejects fewer than 0.1% of pellets when dispersion is stable. The melt index difference between the carrier and the base polyolefin must be controlled; EVA 2020 at 2.0 g/10 min under ASTM D1238 is suitable for let-down ratios of 2–4% in films where the base LDPE or LLDPE has a melt index between 0.5 and 2.0 g/10 min at 190°C/2.16 kg. When the base resin has a melt index above 4.0 g/10 min, the let-down ratio is reduced to below 1.5% to avoid visible swirl marks. REACH compliance applies to the masterbatch as a mixture, and the vinyl acetate monomer residual content is typically below 5 ppm under 21 CFR 177.1350 extraction testing. Terminal products include polyethylene films, injection-molded crates, closures, and extruded sheet.
In injection molding, EVA 2020 is processed at a melt temperature of 180–200°C and a mold temperature below 40°C. A screw compression ratio of 2.5:1 and a back pressure of 5–10 bar are used. Injection pressure is set at 60–80 MPa for multi-cavity tools, but higher filling pressure up to 100 MPa may be required for thin-walled closures below 1.0 mm. The material is less thermally stable than EVA grades with lower vinyl acetate content; residence time at melt temperature is limited to 12 min, and production stops longer than 15 min require purging with LLDPE. Shrinkage after 24 h is typically 1.2–1.8% in the flow direction and 0.8–1.4% transverse; tool design uses separate shrinkage factors. Hardness is measured by ISO 868 and tensile properties by ISO 527-2 on type 5A or 5B specimens. The application is selected for parts requiring soft-touch feel, low-temperature flexibility to -30°C, and phthalate-free formulation. EVA 2020 does not require plasticiser, so migration of low-molecular-weight esters is absent; this reduces failure risk in polycarbonate assemblies where PVC plasticiser migration has been identified as a failure cause. The processing boundary is cooling time: for parts with a wall thickness above 4 mm, cycle time extends beyond 60 s and sink marks appear at bosses. Mold release can be improved with 0.05–0.1% internal release, but loading above 0.3% reduces print adhesion and paintability. Terminal products include grommets, caps, push-fit closures, handles, and sealing rings. RoHS Directive 2011/65/EU Annex II and REACH (EC) No 1907/2006 apply to the finished parts.
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Published documentation for HANWHA EVA 2020 places the grade in the mid-vinyl-acetate segment of the manufacturer’s ethylene-vinyl acetate portfolio. The product designation is commonly read as a nominal vinyl acetate comonomer content of 20% by weight, with the balance consisting of ethylene-derived repeat units and a stabilizer package. Because comonomer content directly controls crystalline order, melt rheology, polarity, and low-temperature ductility, the grade occupies a distinct processing locus between low-VA polyolefin modifiers and high-VA adhesive and encapsulant resins. Density for this VA class is generally reported in the range 0.935–0.945 g/cm³ under ISO 1183-1:2019; melt flow rate measured under ISO 1133-1:2022 at 190 °C and 2.16 kg is routinely specified in the 1.8–2.2 g/10 min band for unfilled material. These values are class-typical and must be checked against the lot certificate because additive loadings and polymerization-line variations can shift the final values within the manufacturer’s release limits.
Processors select HANWHA EVA 2020 for applications requiring a balance of low-temperature impact strength, adhesion to polar substrates, and lower melt temperature than polyethylene. Documented uses in public technical literature include crosslinked and non-crosslinked foam, footwear component compounding, extrusion coating, cable filler compounds, and hot-melt adhesive modifiers. In each case, the performance limit is set not only by the VA content but also by the stabilizer package, gel content, and residual catalyst neutralization, which are lot-specific and not shown in condensed datasheets.
In HANWHA EVA 2020, the pendant acetoxy groups reduce the ability of ethylene sequences to pack into orthorhombic crystallites. The melting endotherm measured by differential scanning calorimetry under ISO 11357-3:2018 is commonly observed between 80 °C and 86 °C, compared with approximately 105–112 °C for high-pressure low-density polyethylene. The degree of crystallinity is lower, which reduces modulus and increases elongation. The single-point melt flow rate is not an intrinsic viscosity measurement; it is an extrusion plastometer value obtained under ISO 1133-1:2022 Procedure A and is sensitive to moisture, thermal history, and die swell. A value of 2.0 g/10 min should therefore not be read as a complete flow model. For mold-fill simulation, capillary rheometry data across shear rates from 10 s⁻¹ to 1000 s⁻¹ are required. Published shear viscosity data for 20% VA EVA grades show stronger shear thinning than LDPE at processing temperatures of 160–190 °C, but the exact curves depend on molecular weight distribution and branching architecture, which the manufacturer does not always disclose.
Thermal degradation during processing is an important boundary. The acetoxy groups can liberate acetic acid if the melt is held above approximately 220 °C for extended residence time. This creates a process conflict: higher melt temperatures are needed to reduce viscosity and improve wetting, but high temperatures accelerate chain scission, discoloration, and corrosion risk. Consequently, the practical processing window for unfilled EVA 2020 in extrusion is typically specified at 160–200 °C melt temperature, with residence time below 15 min. Acid scavenger packages are sometimes added to neutralize trace acid, but converters should verify whether the supplied grade includes such stabilization. Published data for the exact HANWHA EVA 2020 lot-specific thermal degradation kinetic parameters are limited; therefore, the boundaries above are based on the broader 20 wt% VA EVA class.
Production-scale compounding on a corotating twin-screw extruder with 32:1 L/D and segmented screw elements typically processes EVA 2020 as a letdown resin or as a direct compound carrier. The softening characteristics allow rapid melting in the first barrel zones, but the low modulus can reduce the pressure-generation capacity of the upstream melting zone; screw designs using more restrictive kneading blocks may be required to build pressure. Barrel set points are typically maintained at 140–175 °C, with die-head temperature at 170–190 °C and melt pressure at the die limited to 25–40 MPa. Vacuum venting is applied after the mixing section to remove moisture and volatiles. On single-screw extrusion lines with 24:1–30:1 L/D and compression ratios of 2.5:1–3.5:1, a grooved feed section is generally unnecessary because the pellets are not as hard as HDPE. Pre-drying is not mandatory for sealed pellet storage below 60% relative humidity, but moisture levels above 0.05% by weight have been associated with surface imperfections and foaming in unvented barrels. A desiccant dryer at 60–70 °C for 2–4 h is sufficient for humid or long-opened storage conditions.
For injection moulding of thick sections, melt temperatures between 160 °C and 200 °C and mould temperatures between 20 °C and 40 °C are common. Holding pressure is typically kept below 60 MPa to reduce flash in low-viscosity melt. One production-line bottleneck observed with EVA 2020-class materials is the extended clamp-open time caused by sticking of soft parts to core pins; this is mitigated by using surface release agents, lower mould temperature, or adding processing aids.
The following table lists property ranges reported for 20 wt% VA EVA materials, not lot-specific guarantees. Unfilled HANWHA EVA 2020 is expected to fall within these envelopes, but the exact positions depend on molecular architecture, stabilizer content, and specimen preparation.
| Property | Test method | Typical class range |
|---|---|---|
| Density | ISO 1183-1:2019 | 0.935–0.945 g/cm³ |
| Melt flow rate, 190 °C/2.16 kg | ISO 1133-1:2022 | 1.8–2.2 g/10 min |
| Melting point | ISO 11357-3:2018 | 80–86 °C |
| Vicat softening temperature A/10N | ISO 306:2022 | 58–66 °C |
| Shore hardness A | ASTM D2240-15 | 84–88 A |
| Tensile strength | ISO 527-2:2012 | 12–18 MPa |
| Elongation at break | ISO 527-2:2012 | 700–850% |
| Tensile modulus at 1% strain | ISO 527-2:2012 | 30–50 MPa |
The low Shore A hardness and high elongation are directly related to the suppression of crystallinity. When the material is crosslinked with organic peroxides, gel content measured by solvent extraction according to ASTM D2765-16 is often targeted between 55% and 75% for foamed footwear parts. Cure time and temperature must be adjusted because the vinyl acetate group participates in free-radical reactions differently from ethylene sequences; scorch time in the compound can be short at temperatures above 120 °C with dialkyl peroxides. The converter should run oscillating-disc rheometer curves under ISO 6502-1:2018 before setting full-scale cure cycles.
Switching from a low-VA grade to HANWHA EVA 2020 alters three process parameters simultaneously: melt temperature, adhesion, and coefficient of friction. The lower crystallinity reduces the die melt temperature requirement by approximately 10–20 °C relative to a 12% VA EVA. Heat-seal initiation temperature, measured by heat-seal testing under ASTM F2029-16, falls from the 95–110 °C range common for low-VA films to approximately 75–90 °C depending on coating weight, line speed, and seal dwell. This improves sealing on low-energy substrates but can increase blocking at the rewind if chill rolls are not kept below 20 °C. Adhesion to aluminium foil and poly(ethylene terephthalate) improves without a primer or corona treatment because the acetoxy groups increase polar surface interaction. In extrusion coating, peel adhesion values measured under ASTM D1876-01 against corona-treated aluminium foil typically rise from 1.5 N/cm to 3.5 N/cm when moving from 12% VA to 20% VA at equal coat weight. However, the coated web may display higher surface tack, requiring release liners or powdering in high-humidity storage.
| Property | 12% VA EVA | HANWHA EVA 2020-class 20% VA | 28% VA EVA |
|---|---|---|---|
| Melting range, DSC ISO 11357-3:2018 | 95–100 °C | 80–86 °C | 70–75 °C |
| Density ISO 1183-1:2019 | 0.930–0.935 g/cm³ | 0.935–0.945 g/cm³ | 0.950–0.960 g/cm³ |
| Shore hardness | 40–45 D | 84–88 A | 68–74 A |
| Tensile strength ISO 527-2:2012 | 20–25 MPa | 12–18 MPa | 8–12 MPa |
| Elongation at break ISO 527-2:2012 | 600–700% | 700–850% | 800–950% |
| Polar substrate adhesion | low | moderate | high |
| Surface tack | low | moderate | high |
For adhesive and encapsulant uses, higher VA grades exceed EVA 2020 in clarity, elasticity, and adhesion, but they are more difficult to process in standard polyolefin extrusion lines because of plastication issues and surface stickiness. HANWHA EVA 2020 therefore occupies a mid-position: it supports direct extrusion and injection moulding without the severe block and pellet agglomeration typical of 28–33% VA EVA grades, while providing clearly higher polarity than a 9–12% VA grade.
On a compounding batch scale, HANWHA EVA 2020 shows lower melt temperature than high-density polyethylene and can be blended with LDPE, linear low-density polyethylene, or polyolefin elastomers to adjust stiffness. The blend must be prepared with sufficient distributive mixing because VA domains can remain as discrete phases if melt temperature is below the full melting point of the higher-melting component. A single-screw extruder without mixing sections can produce visible heterogeneities if polyethylene granules are introduced above the screw torque limit.
Regulatory documentation for HANWHA EVA 2020 must be obtained from the supplier before food-contact, medical, or toy use. Ethylene-vinyl acetate copolymers can meet the base resin requirements of FDA 21 CFR 177.1520 when the copolymer is prepared from authorized monomers and the total extractables remain within the specified limits; however, this does not confirm specific finished-article compliance. Under REACH Regulation (EC) No 1907/2006, the grade is subject to registration and information requirements in the EU supply chain, while RoHS Directive 2011/65/EU Annex II restricts lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE in electrical and electronic equipment. Converters should maintain supplier declarations and avoid amine-based antistatic additives where they may form carboxylate salts that migrate and affect surface printability.
