| HS Code | 587891 |
| Product Name | HANWHA EVA 1520 |
| Material | Ethylene-Vinyl Acetate (EVA) copolymer |
| Vinyl Acetate Content | 15 wt% |
| Melt Flow Index | 20 g/10 min (190°C/2.16 kg) |
| Density | 0.935 g/cm³ |
| Melting Point | 88°C |
| Vicat Softening Point | 60°C |
| Tensile Strength At Break | 14 MPa |
| Elongation At Break | 800% |
| Hardness Shore A | 92 |
| Brittleness Temperature | -70°C |
As an accredited HANWHA EVA 1520 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1520 is supplied in 25 kg polyethylene-lined paper bags, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | HANWHA EVA 1520 is shipped as a 20′ FCL, packed in 25 kg bags on pallets, ensuring safe, efficient containerized transport. |
| Shipping | HANWHA EVA 1520 (ethylene-vinyl acetate copolymer) is shipped as non-hazardous plastic resin pellets. Transport in clean, dry containers or bags, protected from moisture and direct heat. No dangerous goods classification; standard freight handling applies. Keep away from ignition sources and store in a cool, ventilated area during transit. |
| Storage | Store HANWHA EVA 1520 in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep original packaging sealed to prevent moisture absorption, and store off the floor on pallets. Avoid contact with strong oxidizers. No special temperature control is required if conditions remain moderate. |
| Shelf Life | Shelf life is typically two years from date of manufacture when stored in original, unopened packaging under cool, dry conditions. |
In compression-moulded midsole production, HANWHA EVA 1520 is specified with a nominal vinyl acetate content of 15 wt% and a melt flow index of 2.0 g/10 min at 190°C/2.16 kg per ASTM D1238. The resin is introduced at 100 phr, combined with azodicarbonamide at 3.0–5.0 phr, dicumyl peroxide at 0.8–1.2 phr, zinc oxide at 1.0–2.0 phr, stearic acid at 0.5–1.0 phr, and calcium carbonate at 10–20 phr where density control is required. The compound is first batch-mixed on a two-roll mill at 90–110°C, then sheeted and preformed to fill roughly 85–90% of the final mould volume. During the press cycle, the blowing agent decomposition is activated by the zinc species, shifting gas yield into the 165–175°C range; the peroxide crosslinks simultaneously, so the processing window is held within ±5°C of the set point to prevent undercure or cell collapse. Typical expansion ratios of 1.8–2.0 are used for midsoles, yielding foam densities of 0.16–0.20 g/cm³ and Asker C hardness between 55 and 65. After demoulding, the parts are quenched and allowed to shrink for 24–48 h in controlled storage at 25–30°C before die-cutting. Compression set is evaluated per ASTM D395 Method B; midsole grades typically require ≤30% set after 22 h at 50°C. Because the vinyl acetate content is 15 wt%, the rubbery phase is lower than in 18 wt% or 28 wt% EVA grades, so filler-matrix adhesion should be assisted with silane coupling when calcium carbonate exceeds 20 phr; otherwise flex fatigue cracks initiate around agglomerates under repeated heel strike.
For industrial hot-melt adhesive compounding, EVA 1520 is charged at 100 phr, hydrogenated hydrocarbon tackifier at 100–130 phr, microcrystalline or Fischer-Tropsch wax at 35–50 phr, and hindered phenolic antioxidant at 0.5–1.5 phr. The mixer is blanketed with nitrogen or held under vacuum at 170–180°C for 60–90 min until a clear, air-free melt is obtained. Coating viscosity is monitored at 180°C per ASTM D3236; values are formulation-dependent but typically remain in the 3,000–6,000 mPa·s range for slot-die application to folding carton side seams. Open time is measured per ASTM D4497; for this vinyl acetate level it commonly falls below 15 s, which is suitable for high-speed case sealing but insufficient for deep-penetration bookbinding. Continuous pot temperature above 200°C accelerates acetic acid elimination and viscosity drift; therefore thermal oil or cartridge heaters should be set with an alarm at 195°C. Indirect food-contact adhesives formulated from EVA 1520 are covered under FDA 21 CFR 175.105, provided the adhesive is separated from food by a functional barrier or used only at package edges. REACH documentation for the commercial product should be retained for EU packaging supply chains. Terminal products include folding carton side seams, tray erection, and corrugated case sealing.
Because the crystalline fraction of pure LDPE reduces transmission of photosynthetically active radiation, EVA 1520 is dry-blended into greenhouse film formulations at 20–35 wt% with LDPE or LLDPE, HALS stabilizer at 0.3–0.6 wt%, and antiblock at 0.1–0.3 wt%. The granules are extruded on a single-screw blown-film line with die gap 1.4–2.0 mm, blow-up ratio 2.0–2.5, and melt temperature 170–190°C. The addition of EVA reduces spherulite size in the matrix; haze measured per ASTM D1003 is thereby lowered relative to neat LDPE film at the same thickness. Dart impact is checked per ASTM D1709 Method A; greenhouse films typically require ≥500 g at 50 μm thickness, with EVA improving low-temperature brittleness resistance. Coverage films should meet the provisions of EN 13206:2017 for service life and light transmission categories. The terminal products are agricultural coverings for greenhouses, low tunnels, and soil mulching, where the non-yellowing behaviour of EVA under UV stabilisation is monitored by carbonyl index changes over the intended service period. Above 40 wt% EVA, bubble instability and blocking in the collapsed film become measurable on the production line, so the blend ratio is capped accordingly.
Low-smoke, halogen-free cable jacket compounds use EVA 1520 at 45–60 phr combined with LLDPE at 10–20 phr, maleic anhydride-grafted polyolefin at 3–5 phr, precipitated magnesium hydroxide at 120–150 phr, zinc borate at 3–5 phr, and an antioxidant package at 0.5–1.0 phr. The compound is run through a co-rotating twin-screw extruder with L/D ≥ 44:1 and barrel zones below 150°C to protect the hydroxide from releasing water. Pelletizing should use die-face cutting and rapid cooling to limit fines. Melt flow after compounding is tested per ASTM D1238 at 190°C/2.16 kg; target is commonly 1.0–3.0 g/10 min for pressure tubing extrusion. Cable jackets extruded from this system are conditioned and tested for vertical flame spread per IEC 60332-1-2, smoke density per IEC 61034-2, and acid gas evolution per IEC 60754-2. Terminal applications include 450/750 V control cable sheathing and internal wiring in public buildings where low smoke emission is specified. Because the 15 wt% vinyl acetate fraction in EVA 1520 provides less melt flexibility than 28 wt% EVA, the compound should not be extruded below 130°C head temperature; otherwise melt fracture appears on thin-wall jackets.
Dilution of EVA 1520 with LDPE at 70:30 is used for cast coextrusion of heat-seal layers in flexible lidding and sachet structures. The blend is extruded through a slot die at 210–230°C with die gap 0.8–1.0 mm and cast onto a chill roll held at 15–20°C. The EVA-containing skin lowers heat-seal initiation compared with pure LDPE; seal strength is determined per ASTM F88 on 25 mm strips after 1 s dwell at 0.27 MPa. For food contact, the finished layer must comply with EU 10/2011 overall migration limits and FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers. The presence of 15 wt% vinyl acetate improves puncture resistance and low-temperature sealing, but reduces oxygen barrier relative to EVOH or PVDC; therefore the structure is paired with barrier cores in multilayer laminations. Terminal products include retort-free lidding film for dairy cups, medical device pouches, and condiment sachets. The low melt flow index of 2.0 g/10 min restricts maximum line speed relative to extrusion-coating EVA grades with higher melt flow index; raising melt temperature above 235°C to compensate is avoided due to oxidative degradation and gel formation on the die lip.
In floor-covering and automotive interior sheet production, EVA 1520 is selected over standard polyethylene when high filler loadings and embossing retention are required. The formulation contains EVA 1520 at 100 phr, barium sulfate at 100–200 phr, calcium carbonate at 50–100 phr, process oil at 5–10 phr, stearic acid at 0.5–1.0 phr, and zinc stearate at 1.0–2.0 phr. Mixing proceeds in an internal mixer at 120–130°C for 10–12 min until torque stabilises. The batch is then calendered on a three-roll or four-roll calender with roll surface temperatures between 110°C and 125°C and gap settings descending from 0.8 mm to 0.25 mm. Sheet weight is controlled at 2,000–4,000 g/m² for acoustic barrier applications. Tensile properties are measured per ISO 527-3; elongation at break values above 150% confirm that the mineral filler has not overdried the compound. Flammability of the final automotive sheet must pass FMVSS 302 horizontal burn; zinc borate at 3–5 phr is added where the specification demands self-extinguishing behaviour. The product is used as die-cut acoustic barrier mats, trunk liners, and edge-protection strips. The vinyl acetate content of 15 wt% gives sufficient polarity for filler wetting, but it does not remove the need for intimate pre-dispersion of barium sulfate; bag-mixed direct calendering without internal mixing produces agglomerates that tear during embossing.
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HANWHA EVA 1520 is an ethylene-vinyl acetate copolymer pellet grade specified for extrusion, injection molding, compounding, and crosslinked foam applications. The resin contains a nominal vinyl acetate co-monomer content of 15 wt% and exhibits a melt flow index of 2.0 g/10 min at 190 °C under 2.16 kg load per ASTM D1238. The specified solid density is 0.938 g/cm³ per ASTM D1505. These properties place the grade in a semi-crystalline, low-to-medium flow range that provides melt strength for cell retention in foam while retaining sufficient flow for profile extrusion and injection of footwear components.
| Property | Test method | Representative value |
|---|---|---|
| Vinyl acetate content | ASTM D5594 / ISO 8985 | 15 wt% |
| Melt flow index | ASTM D1238 / ISO 1133-1 | 2.0 g/10 min |
| Density | ASTM D1505 / ISO 1183-1 | 0.938 g/cm³ |
| Peak melting temperature | ISO 11357-3 | 86 °C |
| Hardness | ASTM D2240 | 93 Shore A |
The single-point melt flow index of 2.0 g/10 min does not describe the shear-thinning response of the melt; capillary rheometry at 190 °C over shear rates from 10 s⁻¹ to 1000 s⁻¹ is used for die sizing. The vinyl acetate content of 15 wt% suppresses the crystalline fraction relative to LDPE, but the polymer retains a melting peak near 86 °C that influences heat-seal onset and foam demolding behavior. Published data for extensional viscosity of HANWHA EVA 1520 is limited; however, the low melt index relative to high-flow EVA grades indicates greater elongational melt strength in foam cell walls.
In continuous extrusion and pelletizing lines, HANWHA EVA 1520 is processed in a 30:1 L/D single-screw extruder with a barrier-zone screw and a compression ratio of 3.0–3.5:1. Barrel zones are set at 140 °C, 160 °C, 175 °C, and 185 °C from feed to metering, with the adapter and flat-film die held at 185–190 °C. Melt pressure before the screen pack is maintained at 150–250 bar using a 60/80/100 mesh screen pack to generate dispersive shear and retain gel particles. Reported screw speeds for a 90-mm extruder producing EVA sheet at 180–220 kg/h range from 25 rpm to 50 rpm. The polymer is not normally hygroscopic, but cold-warehouse transfer can produce condensation; at ambient relative humidity above 60%, drying in a desiccant hopper at 50 °C for 1–2 h with a dew point below -20 °C is recommended. Drying above 70 °C should be avoided because pellet surface tack can bridge the hopper throat.
Crosslinked closed-cell foam production with HANWHA EVA 1520 requires synchronization of peroxide cure kinetics and blowing-agent gas evolution. The critical process conflict is the overlap between dicumyl peroxide cure and azodicarbonamide decomposition. Dicumyl peroxide has a half-life of approximately 1 min at 170–180 °C; azodicarbonamide has a main gas-evolution peak near 205 °C and a decomposition onset near 190 °C. If the mold surface temperature is brought directly to 205 °C, peroxide crosslinking proceeds too rapidly and the melt viscosity rises before the gas phase can expand, resulting in high foam density and split cell walls. A two-stage heating profile is therefore applied: first heat to 150–155 °C for 5–7 min to initiate peroxide grafting and chain extension, then raise to 165–175 °C for 8–12 min to complete crosslinking and trigger controlled gas evolution. A final holding step at 175–185 °C for 3–5 min decomposes residual blowing agent before the mold is cooled under pressure. Mold internal pressure is maintained at 120–150 bar in a 300-ton slab press with 600 mm × 600 mm platens to prevent coalescence of nitrogen gas. Foam density after expansion is controlled between 0.15 g/cm³ and 0.30 g/cm³ by adjusting blowing agent loading and press displacement. The addition of zinc oxide at 1.5–2.0 phr and zinc stearate at 0.8–1.2 phr activates azodicarbonamide decomposition; insoluble zinc species also act as nucleating sites for uniform cell size. Published plant-level kinetic data for HANWHA EVA 1520 in footwear expansion is limited, and operators should calibrate cure curves by oscillation disk rheometry at 150 °C per ISO 6502 before setting the production heating ramp.
Injection molding of closures, automotive grommets, and footwear components using the 2.0 g/10 min melt flow index imposes a lower cavity-filling rate than 3.0 g/10 min EVA grades. Clamp force per projected area is raised to 5.0–7.0 kN/cm² to prevent flash at the parting line when using hot-runner manifolds with 1.0–1.5 mm pin-point gates. Melt temperature at the nozzle is held at 180–190 °C; mold temperature is set to 20–30 °C to shorten cooling time, but excessive cooling below 15 °C can produce flow lines and weld-line weakness. Screw recovery in a 40-mm injection unit should maintain a cushion of 3–5 mm; back pressure of 50–100 bar and screw speed of 50–100 rpm are used to melt-homogenize the pellets without excessive shear heating. Published data for specific injection-molding process parameters for HANWHA EVA 1520 is limited; these values represent the production envelope for 15 wt% VA EVA with melt index in the 1.5–2.5 g/10 min range.
Mineral-filled and halogen-free flame-retardant compounds based on EVA 1520 introduce a sharp increase in compound viscosity when magnesium hydroxide or aluminum trihydrate loadings reach 120–180 phr. Compounding is carried out in a co-rotating twin-screw extruder with 40:1 L/D and atmospheric venting; filler is introduced by side feed after the polymer has melted, and screw temperature in the side-feed zone is kept below 190 °C to prevent release of aluminum trihydrate bound water above 200 °C. Specific energy input ranges from 0.12 kWh/kg to 0.18 kWh/kg depending on filler grade and oil addition. Paraffinic process oil at 5–10 phr is added to control torque, but excessive oil reduces Shore A hardness and increases surface tack. The compound is strand pelletized; pellet inlet water temperature is maintained at 10–20 °C to prevent agglomeration of the soft compound. The resulting low-smoke zero-halogen cable jacket compound is tested for limiting oxygen index under ASTM D2863 and for heat release under ISO 5660-1. Published data for specific filler dispersion in HANWHA EVA 1520 is limited; the parameters above are representative of 15 wt% VA, 2.0 g/10 min EVA used in low-smoke zero-halogen jackets.
Replacement of a higher-melt-index EVA with EVA 1520 in a thin-wall application changes the pressure drop in the runner system. At equal melt temperature, the lower melt index increases apparent viscosity; injection pressure may rise by 15–25% for a 1.5-mm wall thickness component. The lower melt index also reduces melt fracture and gives higher melt strength for blow molding or sheet thermoforming. Compared with EVA grades containing 18 wt% or 25 wt% vinyl acetate, EVA 1520 has lower polarity, higher crystallinity, higher tensile modulus, and reduced adhesion to polar substrates; it is therefore preferred where the article must remain stiff and non-tacky at service temperatures below 50 °C. Compared with EVA grades containing 9 wt% vinyl acetate, EVA 1520 has a lower melting peak, broader hot-tack window, improved stress-crack resistance under ASTM D1693 condition B, and greater compatibility with tackifier resins. In multilayer blown film, the 15 wt% VA content places the grade in the sealing-layer range, but the 2.0 g/10 min melt index requires higher die temperatures than high-flow sealant grades to achieve the same film gauge control.
Monolayer cast film and sheet operations typically process EVA 1520 at die lip gaps of 0.5–1.0 mm; the lower melt index increases die pressure and may require a die temperature increase of 5–10 °C compared with a 3.0 g/10 min grade. Chill-roll temperature is set to 10–20 °C to minimize blocking; the 15 wt% VA content lowers the crystalline melting temperature, so the film can be heat-sealed with a sealing jaw temperature of 100–130 °C and a dwell time of 0.5–1.5 s. Seal strength is evaluated according to ASTM F88 after conditioning at 23 °C and 50% relative humidity for 24 h. The film has lower gloss and higher haze than LDPE homopolymer because the vinyl acetate groups scatter light at the surface; haze is measured under ASTM D1003. Published data for optical properties of HANWHA EVA 1520 is limited.
Color masterbatch and additive concentrates based on EVA 1520 are produced with pigment loadings of 20–40 wt% and a low-viscosity wax or metallocene polyethylene carrier. The base resin is introduced in the main feed, and the pigment is fed by side stuffer after the polymer is molten. Melt temperature in the mixing zones is limited to 170–185 °C to prevent thermal degradation of organic pigments and to keep the vinyl acetate groups from deacetylation. The concentrate is pelletized underwater with die-plate temperature 160 °C and water temperature 10–20 °C. Letdown ratio in polyolefin extrusion is typically 2–4%; dispersion is evaluated by a pressure-rise filter test using a 14 µm screen pack per ISO 4577 or by optical microscopy at 100× magnification. Published data for specific masterbatch formulations based on HANWHA EVA 1520 is limited.
Regulatory compliance for HANWHA EVA 1520 follows the controls applied to ethylene-vinyl acetate copolymers. Food-contact suitability is evaluated under 21 CFR 177.1350; the finished article must meet extraction limits referenced in 21 CFR 176.170(c) and 177.1350(b) for the intended food type and temperature. RoHS compliance is assessed under IEC 62321 for restricted substances; REACH SVHC content below 0.1 wt% is normally verified by supplier declaration, not by pellet analysis. The material should not be melt-compounded with amine-based antistatic masterbatches intended for polyolefins unless oxidative stability and peroxide-cure trials have been completed, because amine species can scavenge free radicals and reduce crosslink density in peroxide-cured foam. Storage stability of EVA 1520 in unopened bags at 25 °C and relative humidity below 60% is generally considered acceptable for 12 months from production date, but re-drying and melt-flow verification per ASTM D1238 are required after any exposure to condensation. Operators should verify residual moisture per ISO 15512 before releasing stored lots to processing.
