| HS Code | 861770 |
| Va Content | 15% |
| Melt Flow Index | 29 g/10min at 190°C, 2.16kg |
| Density | 0.938 g/cm³ |
| Melting Point | 85°C |
| Vicat Softening Point | 65°C |
| Tensile Strength At Break | 15 MPa |
| Elongation At Break | 700% |
| Hardness Shore A | 90 |
| Flexural Modulus | 60 MPa |
| Brittleness Temperature | -70°C |
As an accredited HANWHA EVA 1529 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1529 is supplied in 25 kg bags as a thermoplastic ethylene-vinyl acetate copolymer resin for manufacturing use. |
| Container Loading (20′ FCL) | This shipment uses a 20-foot full container load for HANWHA EVA 1529, with bags properly palletized and secured. |
| Shipping | HANWHA EVA 1529 is an ethylene vinyl acetate copolymer resin supplied as non-hazardous solid pellets. Packed in 25 kg multi-wall bags on pallets. It is moisture-sensitive, so keep dry and protect from heat. Not regulated as dangerous goods for road, sea, or air transport under standard conditions. |
| Storage | Store HANWHA EVA 1529 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep the original packaging sealed to prevent moisture absorption and contamination. Avoid stacking excessively high to prevent deformation, and maintain stable temperatures. Use proper handling to minimize dust accumulation and ensure safe storage. |
| Shelf Life | Hanwha EVA 1529 has a shelf life of two years when stored in original packaging under cool, dry, well-ventilated conditions. |
Closed-cell EVA foam sheet based on EVA 1529 is produced by feeding a melt-mixed compound through a three-roll calender and then expanding the web in a tunnel oven where dicumyl peroxide decomposition and azodicarbonamide gas nucleation overlap. The grade combines a vinyl acetate content of 15 wt% and a melt index of 2.9 g/10 min measured to ISO 1133-1:2022, which permits calendering at roll temperatures between 85°C and 95°C before the blowing agent approaches its decomposition onset near 195°C. A production-scale formulation for continuous sheet uses EVA 1529 100 phr, azodicarbonamide 2.0–4.5 phr, dicumyl peroxide 0.6–1.0 phr, zinc oxide 1.0–2.0 phr, zinc stearate 0.5–1.0 phr, and calcium carbonate 5–20 phr. Compliance for technical foam sheet is assessed under ASTM D3575-14, with apparent density determined to ISO 845:2006 and compression set to ISO 1856:2018. The formulation window for continuous expansion is narrower than for compression moulding because the web passes through the oven unsupported. When azodicarbonamide exceeds 4.5 phr or oven temperature exceeds 240°C, surface blistering and web splitting are observed on lines running at 0.6–1.4 m/min. On a 1,200 mm wide line, roll-crown adjustment is revised after 8 h runtime because thermal expansion alters nip profile and causes density variation between edge and centre. Terminal products include gasket tape, thermal insulation foam, impact-protection edge profiles, and expansion-joint filler strips for construction and appliance assembly.
When compression moulding is selected for closed-cell EVA slabstock, the processing route uses a pre-blended compound that is sheeted on an open mill, cut to pre-form weight, and then expanded in a multi-daylight hydraulic press. The peroxide loading is raised relative to continuous sheet foaming to compensate for the longer heat-transfer path from the mould surface to the core. A representative formulation contains EVA 1529 100 phr, dicumyl peroxide 0.8–1.5 phr, azodicarbonamide 3.0–5.0 phr, zinc oxide 1.5–3.0 phr, and calcium carbonate 5–15 phr. The press cycle is held at 155–170°C for 12–18 min with mould pressure of 10–15 MPa. Demoulding pressure is not released until mould temperature drops below 80°C to prevent post-demoulding expansion and permanent deformation. Parts are tested to ASTM D3575-14 for tensile and tear properties and to ISO 1856:2018 for compression set. Terminal products include martial arts mats, orthotic cushioning blocks, anti-fatigue mats, and protective packaging inserts.
EVA 1529 is incorporated into low-voltage insulation and sheathing compounds where the vinyl acetate comonomer increases filler wetting and cold flexibility relative to LDPE, but the melt index of 2.9 g/10 min imposes a practical limit on cable-line speed. The compound is typically produced in an internal mixer or a co-rotating twin-screw extruder with L/D 40:1 at a melt temperature of 150–180°C. A representative halogen-free flame-retardant formulation contains EVA 1529 70 phr, LDPE 30 phr, aluminium trihydroxide 100–150 phr, dicumyl peroxide 1.2–1.8 phr, hindered phenolic antioxidant 0.2–0.4 phr, and vinyl silane coupling agent 0.5–1.0 phr. The final compound is tested to IEC 60502-1:2021 for 0.6/1 kV extruded insulation, flame propagation to IEC 60332-1-2:2015, tensile and elongation to ASTM D638-14, and hot set to IEC 60811-507:2012. After pelletization, the compound is fed to a 90 mm single-screw cable extruder with L/D 30:1 and a compression screw profile. Melt temperature is held at 130–150°C, and the cable enters a dry-cure catenary tube at 200–250°C where peroxide crosslinks the EVA phase. Batch-to-batch variation in aluminium trihydroxide particle size above 3 µm D50 reduces tensile strength after curing and increases torque in the cable extruder. At filler loadings above 150 phr, the compound becomes prone to die build-up and surface roughness on high-speed lines. Terminal products are control cable insulation, low-voltage power cable jackets, and appliance wiring sheaths.
Pigment dispersion in polyolefin masterbatch manufacturing depends on the difference between cohesive energy density of the carrier and the pigment surface. EVA 1529 is used as a carrier resin at 70–80 wt% with pigment or additive 20–30 wt% and processing wax 0–3 wt%. The vinyl acetate content of 15 wt% provides sufficient polar interaction for organic pigments without the steep viscosity reduction of high-VA hot-melt grades. Compounding is performed on a co-rotating twin-screw extruder with L/D 36:1–44:1 at 160–190°C, followed by filtration through 100–200 µm breaker plates and water-ring or underwater pelletization. Compliance for masterbatch used in food-contact packaging must reference EU 10/2011 and FDA 21 CFR 177.1350 when applicable; otherwise REACH and RoHS conformance is specified. Terminal products are colour masterbatch granules, UV stabilizer concentrates, and processing-aid masterbatches for film, blow moulding, and injection moulding.
Flexible technical components moulded from EVA 1529 rely on the grade’s balance of low-temperature impact resistance and hardness, which is intermediate between LDPE and vulcanized rubber but requires no post-mould curing. A compound for injection moulding typically uses EVA 1529 80–100 phr, LLDPE 0–20 phr, calcium carbonate 0–15 phr, and a silicone-containing processing aid 0.5–1.0 phr. Components are tested for tensile properties to ISO 527-2:2012, low-temperature brittleness to ISO 974:2000, and flammability to UL 94 HB where applicable; REACH and RoHS conformance is specified for electrical accessories. Moulding is carried out with a barrel profile from 170°C to 200°C using a 25–45 mm screw with L/D 20:1–24:1, and mould temperature is held at 20–40°C. Because the melt index is 2.9 g/10 min, injection speed and pack pressure are set to avoid jetting into thin-wall cavities; typical holding pressure is 30–60 MPa. On components with wall sections below 1.5 mm, mould-fill imbalance requires gate relocation rather than raising melt temperature above 210°C, which risks surface stickiness. Terminal products are flexible cable glands, grommets, edge protectors, and anti-abrasion covers for industrial harnesses.
In midsole expansion moulding, EVA 1529 is blended with polyolefin elastomer to modify Shore A hardness while retaining a target density of 0.18–0.25 g/cm³. The formulation uses EVA 1529 100 phr, polyolefin elastomer 10–30 phr, azodicarbonamide 3.0–5.0 phr, dicumyl peroxide 0.8–1.2 phr, and zinc stearate 0.8–1.2 phr. Footwear components are evaluated to ISO 868:2003 for Shore A hardness, ISO 4651:1988 for dynamic cushioning performance, and ASTM F1976-13 for impact attenuation where specified. The compound is granulated and injection-foamed using a reciprocating screw unit with a shut-off nozzle. Barrel temperatures are held at 165–185°C, and the mould cavity is filled to 60–70% of volumetric capacity before expansion. Terminal products are running shoe midsoles, foam sandals, and replaceable sockliners.
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Within the ethylene-vinyl acetate copolymer portfolio offered by Hanwha Chemical Corporation, grade EVA 1529 is classified as a 15 wt% vinyl acetate resin with a nominal melt mass-flow rate of 2.9 g/10 min when determined at 190 °C under a 2.16 kg load in accordance with ASTM D1238-20 or ISO 1133-1:2022 Procedure A. The polymer is supplied as translucent pellets with a typical density of 0.938 g/cm³ measured by ASTM D1505-18. The 15 wt% vinyl acetate level positions EVA 1529 between lower-comonomer extrusion coating grades and higher-comonomer footwear or encapsulant resins; the acetate side groups reduce crystalline order relative to low-density polyethylene, lowering the melting peak while increasing flexibility and impact behaviour in moulded and foamed articles. The nominal melt endotherm by differential scanning calorimetry under ASTM D3418-21 is commonly reported at 86 °C, although the exact peak shifts with heating rate, annealing history, and lot-specific branching distribution. Because the melt index is relatively low, the resin retains melt strength during foaming and extrudate formation but generates higher head pressure than high-flow grades at equivalent screw speed.
| Property | Method | Representative value |
|---|---|---|
| Melt mass-flow rate | ASTM D1238-20 | 2.9 g/10 min |
| Vinyl acetate content | Producer specification | 15 wt% |
| Density at 23 °C | ASTM D1505-18 | 0.938 g/cm³ |
| Melting peak | ASTM D3418-21 | 84–88 °C |
| Shore A hardness | ASTM D2240-15e1 | 89–92 Shore A |
| Tensile strength at break | ASTM D638-14 Type IV | 14–18 MPa |
| Elongation at break | ASTM D638-14 Type IV | 750–850 % |
Values in the preceding table are representative for ethylene-vinyl acetate copolymers with 15 wt% vinyl acetate, not an exact certificate of analysis for every production lot. Final part properties depend on processing history, additive package, and specimen preparation.
In closed-mould ethylene-vinyl acetate foam production, EVA 1529 is typically compounded with dicumyl peroxide as crosslinking agent and azodicarbonamide as chemical blowing agent. The processing window is controlled by the competition between peroxide decomposition and gas evolution. On a 110 L intermeshing internal mixer used for masterbatch preparation, drop temperatures are maintained between 95 °C and 105 °C to avoid premature crosslinking while dispersing the peroxide and blowing agent. The discharged sheet is then calendered on a two-roll mill, transferred to a multi-platen press, and cured at 160–170 °C. A ±5 °C deviation in cure temperature can alter the relative decomposition kinetics of dicumyl peroxide and azodicarbonamide. If the melt crosslinks too quickly before gas evolution, expansion is restricted and foam density rises above target. If gas evolution occurs before sufficient gelation, cell walls rupture and the product exhibits open-cell collapse or internal blisters. Production observations from equivalent EVA foam lines indicate that press platen temperature non-uniformity greater than ±5 °C produces density gradients exceeding 0.02 g/cm³ across a 300 mm × 300 mm sheet. To control this, multi-zone oil-heated platens with PID temperature control are used, and thermocouple verification is performed before each shift. In injection-foam variants, a single-screw reciprocating screw with 24:1 L/D and a shut-off nozzle is used, with barrel temperatures set from 160 °C to 180 °C and injection speed profiled to prevent premature expansion inside the screw. The low melt index of EVA 1529 assists melt strength during blowing but increases shear heating; screw speeds above 80 min⁻¹ on a 40 mm screw can generate local melt temperatures exceeding 200 °C, at which acetic acid evolution may begin. Therefore, screw-speed limits and vented barrel zones are specified for production equipment when processing EVA 1529 in continuous foam extrusion.
Thermal analysis of EVA 1529 by differential scanning calorimetry reveals a broad melting endotherm consistent with random incorporation of 15 wt% vinyl acetate. The reduced crystallinity, commonly 15–20 % relative to low-density polyethylene by density or X-ray estimates, produces softness and low-temperature flexibility. Mechanical testing of compression-moulded plaques by ASTM D638-14 Type IV specimens yields representative tensile strength at break of 14–18 MPa and elongation at break of 750–850 %. Shore A hardness values are commonly reported at 89–92 by ASTM D2240-15e1. These properties support use in injection-moulded footwear shells, flexible gaskets, closure liners, and foamed midsole components. However, the hydrocarbon resistance of EVA 1529 is limited; the material swells in ketones, chlorinated solvents, and aromatic hydrocarbons, and continuous contact with mineral oil at elevated temperature is not recommended. Under sustained load, creep resistance is lower than semicrystalline polypropylene and some olefin block copolymers; therefore, structural or high-pressure sealing applications require additional design validation.
When the application requires greater flexibility at −20 °C, the 15 wt% vinyl acetate content of EVA 1529 may be insufficient because low-temperature flexural modulus and impact strength improve as vinyl acetate content rises toward 18–28 wt%. In HANWHA EVA 1828, with a nominal 18 wt% vinyl acetate level and a melt index of 2.8 g/10 min, the additional comonomer further disrupts crystallinity and improves low-temperature flexibility and stress-crack resistance. Conversely, EVA 1529 retains higher thermal stability and greater stiffness than EVA 1828 because fewer acetate side groups are present. In extrusion coating and laminating where molten web stability is critical, EVA 1529 can be processed at lower melt temperatures than LDPE while maintaining adhesion to polar substrates such as aluminium foil and polyethylene terephthalate film. Corona-treated aluminium foil adhesion values for comparable EVA copolymers are typically 2–5 N/15 mm in peel testing, but specific adhesion depends on coating weight, back-pressure, substrate surface energy, and treatment level. When higher adhesion and hot-tack are required, HANWHA EVA 1828 may replace EVA 1529; when easier flow and shorter cycle times are dominant, a higher melt index grade such as EVA 1314 is typically selected.
| Grade | Vinyl acetate content (wt%) | Melt index (g/10 min) | Density (g/cm³) |
|---|---|---|---|
| EVA 1314 | 13 | 14 | 0.934 |
| EVA 1529 | 15 | 2.9 | 0.938 |
| EVA 1828 | 18 | 2.8 | 0.940 |
On production-scale single-screw extruders, EVA 1529 is processed through a 24:1 to 28:1 L/D barrier screw with a compression ratio of 2.5:1 to 3.0:1. Barrel temperature profiles from the feed throat to the die are set between 150 °C and 180 °C, with the die held within 165–175 °C. Because the resin has a melt index of 2.9 g/10 min, head pressure rises more rapidly than with EVA 1314 at identical screw speeds; this pressure can be used for downstream filtration and static-mixing homogeneity. In blown film operations, die gaps of 0.8–1.2 mm and blow-up ratios of 2:1 to 3:1 are common for equivalent EVA resins, but published data for this specific configuration of EVA 1529 is limited. Excessive melt temperature above 220 °C should be avoided because thermal deacetylation may generate acetic acid, causing equipment corrosion and odour defects. Many downstream processors specify pre-drying at 60–70 °C for 2 h when sacks have been stored at relative humidity above 60 %, although the resin’s water absorption is relatively low. Regrind levels up to 20 wt% are tolerated in non-critical thick-section parts, but higher regrind fractions reduce impact strength and increase gel particles in film applications. Screw and barrel metallurgy should be nitride-treated or bimetallic when processing EVA 1529 with peroxide masterbatches, because residual peroxides can cause iron-catalysed degradation.
Injection moulding of EVA 1529 is typically performed on hydromechanical or toggle clamp machines with clamp tonnage calculated from projected area and a cavity pressure of 30–50 MPa. The material’s low melt index requires a higher melt temperature and slower injection than polypropylene; typical barrel settings are 160–190 °C, mould temperature 20–40 °C, and injection speed 40–80 mm/s on a 40 mm screw. Mould shrinkage is anisotropic and depends on wall thickness; transverse shrinkage values of 1.2–2.0 % are observed in 2 mm plaques, while longitudinal shrinkage is 0.8–1.5 %. These ranges are derived from ASTM D955-21 measurements on equivalent EVA copolymers, and part-specific losses require gate location and packing studies. Because EVA 1529 remains flexible after solidification, ejector pin marks can be deeper than with rigid thermoplastics; draft angles of 1° to 2° are specified on ribs and sidewalls. The material is incompatible with polyoxymethylene during melt blending due to acid formation and phase separation, and direct feed of EVA 1529 into a barrel used for polyoxymethylene without purging can cause gas defects. On vertical-clamp injection machines used for overmoulding, the resin bonds adequately to polar substrates when surface temperatures exceed 60 °C, but adhesive promoters are required for non-polar polyolefin substrates. Published data for this specific configuration is limited.
Regulatory conformance of EVA 1529 is assessed against European Union REACH regulation (EC) No 1907/2006 for monomer and additive substances, and against the Restriction of Hazardous Substances Directive 2011/65/EU for lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE when supplied for electrical and electronic equipment components. Ethylene-vinyl acetate copolymers may be evaluated for food contact under 21 CFR 177.1350 in the United States, but finished-article compliance depends on the additive package, layer structure, and migration testing under the intended conditions of use. Halogen-free formulation requests require confirmation that processing aids, slip agents, and colour masterbatches do not introduce fluorinated or brominated substances. When phthalate-free declarations are required for footwear or child-care articles, the supplier’s certificate of analysis should specify detection limits below 0.01 % by mass for each restricted phthalate. No animal-derived substances are intentionally used in the base polymer; however, downstream modification can alter this status. The base resin should not be incinerated at temperatures below 800 °C without adequate afterburner capacity because incomplete combustion of vinyl acetate copolymers can generate acetic acid and carbon monoxide. In blow-moulding and sheet extrusion operations using trim scrap, closed-loop regrind systems are acceptable if fines are removed by dedusting to prevent gel formation and surface defects. Lot-to-lot variation in melt index should be monitored by inline capillary rheometry or ASTM D1238-20 spot checks; a drift greater than ±0.3 g/10 min from the nominal 2.9 g/10 min can indicate formulation or polymerization excursion and should trigger purge and machine setting review.
