| HS Code | 195289 |
| Vinyl Acetate Content Wt | 15 |
| Melt Flow Index G 10min 190 C 2 16kg | 28 |
| Density G Cm³ | 0.936 |
| Melting Point C | 92 |
| Vicat Softening Point C | 65 |
| Tensile Strength At Break Mpa | 15 |
| Elongation At Break | 750 |
| Hardness Shore A | 90 |
| Brittleness Temperature C | -70 |
| Heat Seal Initiation Temperature C | 80 |
As an accredited HANWHA EVA 1528 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1528 is supplied as virgin EVA copolymer resin in 25 kg polyethylene bags, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): A full 20-foot container load of Hanwha EVA 1528 resin pellets, securely bagged and stowed for safe, efficient transport. |
| Shipping | HANWHA EVA 1528 is an ethylene-vinyl acetate copolymer resin supplied as solid pellets. Ship as non-hazardous cargo in clean, dry containers. Keep away from moisture, direct heat, and contaminants. No special dangerous-goods declaration required, but protect bags from damage during transit and storage. |
| Storage | Store HANWHA EVA 1528 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep original containers tightly sealed when not in use to prevent contamination and moisture absorption. Avoid dust accumulation and contact with strong oxidizing agents. Maintain moderate temperatures, ideally below 30°C, and follow good housekeeping practices. |
| Shelf Life | Shelf life is typically 24 months from manufacture date when stored in a cool, dry place away from sunlight. |
Hanwha EVA 1528 is specified with a nominal vinyl acetate content of 15 wt% and a melt mass-flow rate of 2.8 g/10 min at 190°C/2.16 kg under ISO 1133-1:2022. In three-layer agricultural cover film, the grade is run as the core layer at 30–50 wt% of total film mass, with the outer skins at 20–35 wt% each from LLDPE or LDPE to preserve dart impact and film flexibility. The EVA core raises light transmission and reduces frost-crack sensitivity at low installation temperatures, but the processing window is narrow: a three-layer coextrusion blown film line with die gap 1.6–2.5 mm, barrel temperatures 160–190°C, die temperature 185–205°C, and blow-up ratio 2.0:1–2.5:1 is used. Above 210°C, acetic acid evolution from the VA groups increases, producing die-lip corrosion and film haze; therefore, the upper die zone is held below 205°C. The layer distribution is controlled by gravimetric hoppers with a batch tolerance of ±1.5 wt%. Anti-fog and anti-drip additives are commonly introduced into the EVA core at 0.5–1.2 wt% of the middle layer. Terminal products include single-season greenhouse tunnels, multi-season low tunnels, and side-curtain films. The relevant compliance reference is EN 13206 for plastic covering films for agricultural use, with mechanical checks under ISO 527-3:2018, haze under ASTM D1003-21, and dart impact under ASTM D1709-22.
Blends with 70–85 wt% EVA 1528 and 15–30 wt% octene LLDPE at nominal density 0.914–0.920 g/cm³ are processed on a double-bubble biaxial orientation line. The EVA 1528 portion raises shrink tension and improves seal-jam strength after shrink-tunnel exposure at 120–150°C, but draw resonance appears when orientation temperature falls below 75°C because molecular mobility is insufficient; above 96°C, bubble stability is lost due to reduced melt strength. The orientation window is therefore held at 80–95°C with internal bubble pressure 0.15–0.35 MPa and orientation ratios of 4.0:1–4.5:1 in machine direction and 3.5:1–4.0:1 in transverse direction. The double-bubble line requires a first blown bubble with water-quench calibration, a reheat zone with infrared heating panels, and a second bubble with air cooling. Terminal product thickness after slitting is 35–60 µm; downstream users convert the film into multipack bottle collation, printed overwrap for beverage cans, and protective sleeve wrap. Compliance includes FDA 21 CFR 177.1350 for EVA copolymers in food-contact overwrap and EU Regulation 10/2011 with overall migration below 10 mg/dm². Shrink behavior is measured under ASTM D2732-23, tensile properties under ISO 527-3:2018, and haze under ASTM D1003-21. Published data for this specific grade in double-bubble configuration is limited; the numerical window is consistent with EVA copolymers of similar viscosity and VA content.
In crosslinked polyolefin foam compounds, EVA 1528 is used as the high-hardness backbone at 55–70 phr, with EVA 28 at nominal VA content 28 wt% at 30–45 phr to retain flex-crack resistance. A typical compound contains azodicarbonamide at 2.8–4.5 phr, dicumyl peroxide at 0.9–1.4 phr, ZnO at 1.0–1.5 phr, stearic acid at 0.3–0.6 phr, and calcium carbonate at 0–15 phr. The processing conflict is thermal: ZnO shifts azodicarbonamide decomposition onset into the 155–170°C range, while dicumyl peroxide requires 170–180°C for rapid crosslinking. This overlap is monitored on a moving die rheometer at 170°C; if the cure plateau begins more than 30 s after gas evolution, cell coalescence and sheet collapse occur. Mixing is conducted in an intermeshing Banbury-type mixer with a discharge temperature of 100–110°C, followed by a two-roll mill at 90–100°C to homogenize the sheet stock. Pressing is performed in a daylight press at 155–170°C and 15–25 min cycle time. Terminal products include footwear midsole sheets, sandal sheet stocks with Shore C hardness 55–65, and gym mat underlay. Compliance is based on REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU for heavy metals; foam density is checked under ISO 845:2006, compression set under ISO 1856:2018, and hardness under ASTM D2240-21.
EVA 1528 enters low-smoke zero-halogen cable sheathing as part of the polymer fraction at 20–40 wt% of the polymeric matrix. The remaining polymer fraction is typically EVA 28 and/or LLDPE, with aluminum trihydrate at 150–180 phr and magnesium dihydrate at 30–50 phr as fire-retardant fillers. The technical role of EVA 1528 is filler wetting: the 15 wt% VA content wets untreated ATH surfaces better than non-polar LLDPE, raising the maximum filler absorption before pressure builds at the die. Twin-screw compounding is carried out on a 40:1 L/D co-rotating twin-screw extruder with side feeding of ATH after the polymer melt seal, barrel temperatures 140–170°C, screw speed 300–450 rpm, and a vacuum vent of -0.08 MPa to remove water released from filler surfaces. ATH decomposition begins near 180–200°C; processing above 175°C produces moisture porosity and pinholes in the extruded sheath. The compounded pellets are then applied by a 90 mm single-screw extruder with a low-compression barrier screw at melt temperature 160–175°C. Terminal products include building control cable sheathing, low-voltage power cables for public infrastructure, and shipboard cable jackets. Compliance is anchored to the following matrix.
| Standard | Test target | Measurement endpoint |
|---|---|---|
| IEC 60754-1:2011 | Halogen acid gas | pH ≥ 4.3; conductivity ≤ 10 µS/mm |
| IEC 60754-2:2019 | Acid gas evolution | HCl ≤ 0.5% |
| IEC 61034-2:2019 | Smoke density | Transmittance ≥ 60% |
| IEC 60332-1-2:2004 | Flame spread | Char height ≤ 425 mm |
| ISO 4589-2:2017 | Oxygen index | 32–36% O₂ |
In cast and blown coextruded packaging structures, EVA 1528 is run as the sealant layer at 70–90 wt%, blended with a slip and anti-block masterbatch at 3–5 wt% and a polyolefin tie resin where layer adhesion is required. The seal initiation temperature of the grade, measured under ASTM F2029 heat-seal conditions at 0.275 MPa and 0.5 s dwell, is typically 85–95°C, and a stable heat-seal plateau is achieved at 110–130°C. The production process is a three-layer cast film line with die gap 0.5–0.8 mm, chill roll temperature 18–25°C, and line speed 150–300 m/min; additive migration to the seal surface is controlled by limiting slip additive to 500–1000 ppm. Terminal products include lidding films for dairy multipacks, frozen vegetable pouches, and overwrap for medical devices. Compliance is governed by FDA 21 CFR 177.1350 for EVA copolymers and EU Regulation 10/2011, with specific migration limits verified under EN 1186-1:2002 and overall migration under EN 1186-2:2002; heavy metal release is checked under 94/62/EC packaging waste directive where applicable.
For additive masterbatches requiring high mineral loading and low die swell, EVA 1528 is used as carrier at 55–75 wt% of the masterbatch, with the active pigment or stabilizer at 20–35 wt% and dispersant wax at 2–5 wt%. The 15 wt% VA content avoids blocking and provides a wider compatibility window with LDPE and LLDPE than higher-VA carriers; melt viscosity also permits adequate filler wetting without excessive shear heating. Production uses a co-rotating twin-screw extruder with 32:1 L/D, screw speed 400–600 rpm, melt temperature 150–180°C, and a strand die feeding a pelletizer. Terminal products include TiO₂ concentrates for cast film, blowing agent concentrates for profile extrusion, and silica anti-block masterbatches for blown film. The carrier itself is covered by FDA 21 CFR 177.1350, but the final food-contact status depends on the active additive and the end-use film’s migration profile under EU Regulation 10/2011. Residence time above 5 min at 180°C is avoided to prevent VA degradation and gel formation.
EVA 1528 is used as a blend component at 10–30 wt% in LDPE/LLDPE technical sheet and profile compounds to increase flexibility and environmental stress-crack resistance. The extrusion process is run on a single-screw extruder with 30:1 L/D, barrel temperatures 150–190°C, die temperature 185–205°C, and calender stack rolls at 30–60°C for sheet thickness 0.5–3.0 mm. Draw ratio is limited by the grade’s melt index; above 4:1 haul-off, edge tear initiates in thin sheet. Terminal products include spacers for flat-panel packaging, gaskets for non-pressure drainage systems, and temporary protection sheet. Compliance for non-food technical uses is based on RoHS Directive 2011/65/EU for lead, mercury, cadmium and hexavalent chromium and REACH Regulation (EC) No 1907/2006 SVHC screening; mechanical property checks use ISO 527-2:2012 for yield stress and ISO 178:2019 for flexural modulus.
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The product HANWHA EVA 1528 is a random ethylene-vinyl acetate copolymer pellet produced by Hanwha TotalEnergies Petrochemical Co., Ltd. The grade designation encodes a nominal vinyl acetate content of 15 wt% and a nominal melt flow index of 2.8 g/10 min when determined at 190 °C under a 2.16 kg load according to ASTM D1238 or ISO 1133-1. The random incorporation of vinyl acetate along the polyethylene backbone disrupts orthorhombic lamellar packing, reducing crystallinity relative to LDPE and imparting a balance of flexibility, optical clarity as evaluated by ASTM D1003, stress-crack resistance as evaluated by ASTM D1693, and reduced heat-seal initiation temperature as evaluated by ASTM F88. Typical converter usage includes cast film, blown film, coextruded sealant webs, extrusion coating of paperboard and foil, profile extrusion, and chemical blowing-agent foam expansion. The resin is not a direct drop-in replacement for LDPE or lower-vinyl-acetate EVA grades in every line configuration, because its melt strength, thermal stability boundary, and lower modulus require adjustments to screw geometry, die temperature, and take-off settings.
At the segmental level, each vinyl acetate unit contributes an acetate pendant group that introduces both steric hindrance and dipolar interaction. These pendant groups prevent long runs of ethylene repeat units from registering into the low-energy orthorhombic unit cell; the resulting crystallinity is therefore lower than that of high-pressure LDPE and lower than that of EVA grades with 9–13 wt% vinyl acetate. Differential scanning calorimetry performed under ASTM D3418 or ISO 11357-3 resolves a broad melting endotherm with a peak typically in the 85–95 °C interval rather than the sharper 105–115 °C melting peak commonly observed for LDPE. The same crystalline disruption lowers the Vicat softening point, reduces flexural modulus, and increases elongation at break. These changes are accompanied by improved low-temperature impact toughness and greater resistance to environmental stress cracking in the presence of polar surfactants, detergents, and fatty acids, as quantified by ASTM D1693 bend-strip testing or ASTM D256 Izod impact.
The flow behaviour of EVA 1528 is shear-thinning. At low shear rates the resin has higher apparent viscosity than a 28 g/10 min hot-melt-grade EVA, but at film-extrusion shear rates the viscosity falls sufficiently for high throughput. The 2.8 g/10 min melt index indicates a moderate molecular weight distribution. This moderate flow grade preserves enough melt strength for blown film bubble stability while still allowing cast film draw-down. Because vinyl acetate depresses crystallinity, the resin enters the melt state over a broader temperature interval, and processors should not rely on a sharp melting transition when setting zone temperatures. The practical consequence is that the metering zone can be run 10–15 °C below a comparable LDPE profile while still achieving homogeneous melt.
The critical processing boundary is thermal deacetylation. At sustained melt temperatures above 230 °C, the vinyl acetate repeat units undergo acetic acid elimination, producing conjugated unsaturation that accelerates discoloration, increases carbonyl absorbance near 1735 cm⁻¹, and forms gel particles. The onset is not sharp in commercial extruders because shear heating in screw mixing elements can create local temperatures well above the barrel set point. Production lines therefore require either a vented barrel with corrosion-resistant construction or strict residence-time control; adapter and die surfaces should be chrome-plated or fabricated from bimetallic alloys. At 220 °C, total residence time below 20 min is a conservative operational boundary observed in continuous extrusion, beyond which gel specks and acetic acid odour become detectable. The conflict between high melt temperature for thin-gauge draw-down and low melt temperature for thermal stability can create a processing window as narrow as ±5 °C on older extruders with inadequate temperature control.
On production-scale single-screw extrusion equipment, the screw should be a single- or double-flighted design with an L/D ratio of 24:1 to 30:1 and a compression ratio of 2.5:1 to 3.2:1. High-shear barrier flights with tight clearances are generally unnecessary for EVA 1528 and may promote localized overheating. Screen packs of 80/120/80 mesh are typical for blown film; for cast film, finer filtration down to 40 μm may be used if gel control is critical. A reverse-temperature profile is not required. A suitable barrel profile is feed 140–160 °C, compression 170–190 °C, metering 190–200 °C, and die 190–210 °C. The melt temperature measured at the die should remain below 220 °C, with excursions above 230 °C limited to short-duration events.
Pre-drying is not routinely required for EVA at ambient storage because the polymer is not hydrolytically unstable at room temperature, but resin exposed to high humidity or condensation should be dried at 60 °C for 2–4 h using a dehumidified-air hopper dryer. In blown film, a die gap of 0.8–1.2 mm and a blow-up ratio of 2.0:1 to 2.5:1 are preferred; the frost line height should be set at 3–5 die diameters to balance melt strength and optical clarity. Because EVA 1528 has lower melt strength than LDPE of similar melt index, excessive blow-up ratios above 2.8:1 can produce bubble instability and gauge variation. Blending with 10–20 wt% LDPE is sometimes used to improve bubble stability without eliminating the seal adhesion benefits of the vinyl acetate comonomer.
On cast film lines, the chill roll temperature is controlled at 15–25 °C to minimize blocking. The air gap from die lip to chill roll should be kept short because the lower melting point of EVA 1528 causes rapid thermal contraction and can increase neck-in. Melt temperature is generally held 5–10 °C lower than a corresponding LDPE cast film operation. Extrusion coating is possible but requires careful selection of back pressure and die gap because the moderate melt index may limit line speed; published data for high-speed extrusion coating with this specific grade is limited.
The following table compares EVA 1528 with the adjacent vinyl-acetate classes commonly evaluated for flexible packaging and foam. The values are representative ranges; lot-specific release limits in the manufacturer’s certificate of analysis take precedence.
| Parameter | Method | Lower-VA class (13 wt% VA) | EVA 1528 | Higher-VA class (18–28 wt% VA) |
|---|---|---|---|---|
| Vinyl acetate content | ASTM D5594 / internal FTIR | 13 wt% nominal | 15 wt% nominal | 18–28 wt% nominal |
| Melt flow index | ASTM D1238 / ISO 1133-1 | 2.6 g/10 min typical for a comparable flow grade | 2.8 g/10 min at 190 °C / 2.16 kg | 2.0–43 g/10 min across the class |
| Density | ASTM D1505 / ISO 1183 | 0.935 g/cm³ typical | 0.938 g/cm³ approximate | 0.940–0.950 g/cm³ depending on VA |
| DSC melting peak | ASTM D3418 / ISO 11357-3 | 90–98 °C | 85–95 °C | 70–85 °C |
| Vicat softening point | ASTM D1525 / ISO 306 | 80–90 °C | 75–85 °C | 55–75 °C |
| Heat-seal initiation shift relative to LDPE | ASTM F88 sealed-bar tensile | 10–15 °C lower | 10–20 °C lower | 20–30 °C lower |
For food-contact applications, the base resin composition is generally within the class of ethylene-vinyl acetate copolymers that may be referenced under 21 CFR 177.1350 for U.S. food-contact use and evaluated for overall migration under (EU) No 10/2011 by EN 1186-1. Compliance must be confirmed with the manufacturer’s certificate of compliance for the specific lot and additives, because the presence of slip agents, antiblocks, or peroxides can shift migration behaviour and extractable fractions.
At constant die lip temperature and bubble geometry, the 15 wt% vinyl acetate content lowers the onset of melting and reduces crystalline perfection relative to a 13 wt% vinyl acetate grade. The difference appears as a measurable reduction in heat-seal initiation temperature, commonly in the order of 2–5 °C, and an increase in low-temperature dart impact strength when tested according to ASTM D1709. The modulus decreases by roughly 10–20%, and the film becomes more extensible; this is advantageous in stretch or thermoformed shapes but can increase gauge variation on older collapsing frames with insufficient tension control.
The increased polarity from vinyl acetate improves wetting on polar substrates and raises peel adhesion in coextruded sealant webs, but gas permeability and moisture vapour transmission rate increase relative to a lower-VA EVA, as measured by ASTM D3985 oxygen transmission and ASTM F1249 water vapour transmission. Processors should expect a slightly lower frost line height requirement because the melt crystallizes more slowly and the latent heat release is lower. On a line originally optimized for 13 wt% VA EVA, the set points may be reduced by 5–10 °C in the metering zone to maintain the same melt viscosity and avoid overheating. Bubble stability may remain acceptable if the blow-up ratio is kept below 2.5:1; above that, the lower melt strength of the 15 wt% grade can cause edge flutter and film blocking on the collapsing frame.
Compared with an 18–28 wt% vinyl acetate EVA, EVA 1528 has higher crystallinity, higher modulus, lower gas permeability, and higher thermal softening point, but it offers less low-temperature tack and less compatibility with hydrocarbon tackifiers in hot-melt systems. Compared with LDPE, it provides lower flexural stiffness, better environmental stress-crack resistance, better optical clarity, and lower heat-seal initiation temperature, but it has lower tensile strength and lower melt strength. The selection of EVA 1528 therefore targets applications that require a moderate polarity shift from polyethylene without the excessive softness and blocking of high-vinyl-acetate grades.
In chemically blown foam operations, EVA 1528 is blended with azodicarbonamide or proprietary endothermic foaming agents at 1–3 phr and crosslinked with dicumyl peroxide in a two-roll mill or internal mixer. The vinyl acetate segment lowers the crystalline melting point and broadens the expansion window, permitting more uniform cell nucleation before crosslinking sets the melt. Batch-to-batch variation in vinyl acetate content should be held to the release limits because a shift of 0.5 wt% can alter melt viscosity, curing torque, and final foam density. Published data for this specific grade in foam formulations is limited; process validation on production-scale equipment is required to establish the decomposition temperature profile of the blowing agent relative to the resin melt temperature.
