| HS Code | 263482 |
| Material | HANWHA EVA 2050 Ethylene Vinyl Acetate Copolymer |
| Vinyl Acetate Content | 20 wt% |
| Density | 0.940 g/cm³ |
| Melt Flow Index | 50 g/10 min (190°C, 2.16 kg) |
| Tensile Strength At Break | 6 MPa |
| Elongation At Break | 700% |
| Hardness | 75 Shore A |
| Melting Point | 70-75 °C |
| Vicat Softening Point | 45 °C |
| Crystallization Temperature | 50 °C |
| Glass Transition Temperature | -30 °C |
| Brittleness Temperature | -70 °C |
As an accredited HANWHA EVA 2050 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied in 25 kg net polyethylene-lined bags as free-flowing pellets, ensuring safe handling, storage, and transportation. |
| Container Loading (20′ FCL) | 20′ FCL container loading of Hanwha EVA 2050 Ethylene Vinyl Acetate Copolymer in palletized bags, securely stowed for safe transport. |
| Shipping | HANWHA EVA 2050 (Ethylene Vinyl Acetate Copolymer) is shipped as pellets in moisture-resistant, sturdy bags or bulk containers. Protect from heat, direct sunlight, and mechanical damage. Store in a cool, dry, well-ventilated area. Material is non-hazardous, but avoid dust accumulation and static discharge. Handle with care to prevent bag tearing. |
| Storage | Store HANWHA EVA 2050 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid stacking excessively to prevent deformation. Maintain moderate temperatures; no special hazard exists, but good housekeeping ensures product integrity and safe handling. |
| Shelf Life | Shelf life is typically two years when stored unopened in a cool, dry place away from direct sunlight. |
Hot-melt adhesive compounding with HANWHA EVA 2050 uses the producer-specified vinyl acetate content of 20 wt% and melt index of 50 g/10 min recorded under ASTM D1238 at 190°C/2.16 kg. In packaging and bookbinding adhesives, typical compounding practice combines 30–35 wt% EVA 2050, 38–45 wt% hydrogenated C5/C9 tackifier, 15–25 wt% Fischer-Tropsch paraffin wax, and 0.3–0.8 wt% hindered phenolic antioxidant. Mixing is performed in a jacketed sigma-blade kneader or vertical ploughshare mixer at 150–175°C under a nitrogen blanket. If pellets have been stored at relative humidity above 60%, pre-drying at 60–70°C for 2–4 h is required before melt processing because residual moisture produces bubble defects during slot-die coating. The terminal products include corrugated case and carton sealing, bookbinding spine adhesive, and edge-banding lamination.
Melt viscosity is controlled between 400 and 1200 mPa·s at 180°C using a Brookfield Thermosel with spindle SC4-27, depending on wax-to-tackifier ratio. Slot-die coaters apply a wet film of 0.15–0.35 mm; open time is 8–15 s and set time is 3–6 s at 160°C on clay-coated board. Increasing EVA 2050 from 28 wt% to 38 wt% raises high-temperature shear resistance but reduces initial wetting of porous substrates. In-line corrugated case-sealing trials typically run with compression dwell of 0.5–1.0 s and pressure of 0.2–0.5 MPa. The upper processing boundary is 200°C; above this threshold, vinyl acetate deacetylation releases acetic acid and accelerates viscosity drift. The grade should not be combined with polyamide resins containing reactive amine end groups because acid/base interaction with partially hydrolyzed acetate groups can form gels during extended pot-life holding.
| EVA 2050 loading (wt%) | Tackifier loading (wt%) | Wax loading (wt%) | Melt viscosity at 180°C (mPa·s) | Softening point (°C) | Peel strength on corrugated board (N/25 mm) |
|---|---|---|---|---|---|
| 28 | 42 | 25 | 350–450 | 88–92 | 4.0–6.0 |
| 33 | 40 | 22 | 600–800 | 92–96 | 5.0–7.0 |
| 38 | 37 | 20 | 900–1200 | 96–100 | 6.0–8.0 |
Polymer-modified bitumen for heavy-duty road pavement uses EVA 2050 at 3–7 wt% of bitumen mass. The polymer is dispersed into 60/70 penetration-grade bitumen at 175–190°C using a rotor-stator high-shear mill at 3500–5000 rpm for 45–90 min. Pellet fragmentation occurs within the first 10 min; final dispersion is evaluated by fluorescence microscopy and by softening point stability. Under ASTM D36, the softening point typically increases from 46–50°C to 65–72°C. Penetration at 25°C under ASTM D5 decreases from 60–70 dmm to 35–45 dmm, and Brookfield viscosity at 135°C under ASTM D4402 rises to 1500–3500 mPa·s. The terminal product is a polymer-modified bitumen binder for high-stress road segments and waterproofing membranes.
High-temperature rutting resistance is assessed by multiple stress creep recovery testing under ASTM D7405 or AASHTO T 350. Storage stability is the critical control point: after 72 h at 163°C, the difference in softening point between top and bottom samples should not exceed 2.5°C under EN 13399. If phase separation exceeds this limit, 0.1–0.3 wt% elemental sulfur or a small addition of EVA-g-MA compatibilizer is used. Published grade-specific data for EVA 2050 in sulfur-crosslinked bitumen is limited; pilot trials are required before plant scale-up. Processing temperature must not exceed 200°C because bitumen fumes and polymer degradation accelerate rapidly. Direct-fired heating is unsuitable; jacketed thermal oil heating is required. Strong oxidizing additives and cationic emulsifiers can destabilize the polymer phase during subsequent emulsion production, which is not recommended with this grade.
Solvent-borne lamination adhesives for flexible intermediate packaging use EVA 2050 at 15–25 wt% solids in a toluene/MEK 80:20 or toluene/ethyl acetate 70:30 solvent blend. Dissolution is conducted in a closed jacketed reactor at 60–75°C with low-shear propeller agitation at 150–300 rpm. For pellets of 2–3 mm, complete dissolution requires 2–4 h; cold solvent or undried pellets extend dissolution time and increase haze. Final adhesive solution is filtered through a 25 μm bag filter before drum filling because undissolved gel particles cause coating streaks on gravure rolls. Solution viscosity is 200–800 mPa·s at 25°C measured by Brookfield LV at 30 rpm, which permits gravure or micro-roll coating without excessive additional dilution.
Dry coat weight on aluminum foil or metallized PET is 2.0–4.0 g/m². Drying tunnels operate in three zones at 80–110°C; residual solvent should remain below 5 mg/m² to meet EU packaging requirements. Peel strength on PET/aluminum after 24 h cure and 60°C aging is typically 2.5–6.0 N/15 mm under ASTM D1876. Substrate surface energy should be above 38 dyn/cm for consistent bond formation. Compliance for food-contact adhesives is covered under FDA 21 CFR 175.105 and FDA 21 CFR 177.1350 for ethylene vinyl acetate copolymers, subject to extraction limits and end-use temperature conditions. REACH registration under Regulation (EC) 1907/2006 and RoHS 2011/65/EU apply when the laminate is used in electrical or electronic articles. The toluene/MEK solvent mixture has a flash point below -4°C, requiring explosion-proof mixing rooms. Avoid formulations containing nitrocellulose with secondary amine solvents because long-term storage can increase color through aldehyde condensation reactions.
In halogen-free flame-retardant cable compounds, EVA 2050 functions as a high-flow polar modifier rather than as the sole matrix resin. The grade is incorporated at 5–15 phr into a base compound of low-density polyethylene and EVA with 28–33 wt% vinyl acetate. The 20 wt% vinyl acetate content in EVA 2050 is insufficient for maximum filler wetting alone, but its melt index of 50 g/10 min lowers extruder head pressure during compounding of 150–180 phr aluminum trihydrate and magnesium dihydrate. Mixing is performed in a co-rotating twin-screw extruder with L/D 36–48 at 130–160°C, screw speed 250–400 rpm. In production-scale comparative runs, 5 phr EVA 2050 reduces torque by 8–15% compared to an unfilled control; published data for this specific grade in production-scale HFFR extrusion is limited and should be confirmed on pilot equipment.
Peroxide curing is conducted with dicumyl peroxide at 0.6–1.2 phr, typically on a continuous vulcanization line at 170–220°C. Scorch time T5 at 140°C under ISO 6502 is shortened by more than 2 min when EVA 2050 is present at 15 phr compared with unfilled EVA compounds, narrowing the processing window. Pelletization must remain below 160°C when the peroxide masterbatch has already been added; premature crosslinking creates hard gels that block screen packs. The compound is used for cable sheathing meeting IEC 60332-1-2 flame spread limits and low acid gas emission under IEC 60754-1. Because the melt index of EVA 2050 is high, tensile strength is supplied primarily by the lower-MI polyethylene/EVA base fraction; the grade is not suitable as the sole cable matrix resin where tensile strength above 10 MPa is required after aging.
| Application segment | Standard or regulation | Parameter or requirement | Practical boundary |
|---|---|---|---|
| Hot-melt adhesive | ASTM D1238, ASTM D4498, FDA 21 CFR 177.1350 | Melt index, shear adhesion failure temperature, food-contact extraction | Do not exceed 200°C; pre-dry at RH above 60% |
| Asphalt modification | ASTM D36, ASTM D5, ASTM D4402, EN 13399, EN 14023 | Softening point, penetration, viscosity, storage stability | High-shear mix only at 175–190°C; avoid > 7 wt% loading without compatibilizer |
| Solvent-borne lamination | ASTM D1876, FDA 21 CFR 175.105, FDA 21 CFR 177.1350 | Peel strength, food-contact adhesive compliance | Residual solvent below 5 mg/m²; explosion-proof mixing required |
| Halogen-free cable compound | IEC 60332-1-2, IEC 60754-1, ISO 6502 | Flame spread, acid gas emission, scorch time | Pelletize below 160°C after peroxide addition |
| Wax-based heat-seal coating | ASTM F88, FDA 21 CFR 176.170, FDA 21 CFR 176.180 | Seal strength, food-contact paper and board compliance | Melt at 120–145°C; avoid > 160°C to prevent wax degradation |
| Polyolefin masterbatch carrier | ISO 1133-1:2022, REACH 1907/2006, RoHS 2011/65/EU | Melt flow, chemical registration, hazardous substance restrictions | Pelletizing above 170°C causes strand tackiness and conveyor collapse |
Wax-based heat-seal coatings for coated paper, board, and flexible film lidding are modified with EVA 2050 at 20–30 wt% of total coating solids. The carrier is a paraffin/microcrystalline wax blend at 40–60 wt%, hydrogenated tackifier at 10–25 wt%, and low-density polyethylene wax at 0–5 wt% for rub resistance. Ingredients are melted in a jacketed agitated vessel at 120–145°C; higher temperatures are unnecessary because EVA 2050 disperses readily in the paraffin melt. Viscosity at 120°C is 250–700 mPa·s under Brookfield Thermosel conditions, supporting curtain coating or roller coating at line speeds of 50–200 m/min. The terminal product is used on coated paper cup stock and lidding membranes.
Heat-seal initiation temperature on paper/PE structures is 75–95°C at 0.2–0.5 MPa sealing pressure and 0.5–1.0 s dwell. Seal strength after 24 h is 3.0–6.0 N/15 mm under ASTM F88. The addition of EVA 2050 improves low-temperature flexibility compared with straight paraffin, but the polar vinyl acetate groups can moderately increase water vapor transmission. Film barrier properties are rebalanced with high-melt-point paraffin fractions. Food-contact compliance for aqueous and fatty food packaging is assessed under FDA 21 CFR 176.170 and FDA 21 CFR 176.180 for components of paper and paperboard, subject to migration limits in the final structure.
Masterbatch production for polyolefin film, injection molding, and extrusion coating uses EVA 2050 at 50–70 wt% as carrier resin because the high melt index and vinyl acetate polarity aid pigment wetting without requiring excessive paraffin wax. A representative formulation contains 60 wt% EVA 2050, 25–35 wt% organic pigment or hindered amine light stabilizer, and 5–10 wt% polyethylene wax or zinc stearate as processing aid. Compounding is carried out on a co-rotating twin-screw extruder with L/D 36–44, screw diameter 25–75 mm depending on output, at a barrel profile of 120–160°C. The polymer is introduced through the main throat; pigments are fed through a side feeder located 6–9 D downstream to prevent thermal degradation of heat-sensitive colorants.
Dispersion quality is checked with a 100 μm multilayer filter screen pack at the die. A pressure rise above 8 MPa over 4 h indicates inadequate dispersion or screen blinding. The final masterbatch is added to polyethylene or polypropylene at 2–5 wt%. EVA 2050 has lower additive-carrying capacity than EVA grades with melt index of 400–800 g/10 min, but its higher molecular weight provides better strand stability during underwater pelletizing. The carrier complies with REACH under Regulation (EC) 1907/2006 and RoHS 2011/65/EU. Food-contact masterbatches must be assessed under the final article’s migration limits in Regulation (EU) 10/2011 or FDA 21 CFR 177.1350. Pelletizing should not be conducted above 170°C because the molten strand becomes tacky and may collapse on the conveyor due to low melt strength.
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The HANWHA EVA 2050 Ethylene Vinyl Acetate Copolymer is a pelletized, high-pressure free-radical copolymer grade with a nominal vinyl acetate content of 20 wt% and a melt mass-flow rate of 5.0 g/10 min when measured at 190°C under 2.16 kg load in accordance with ASTM D1238 and ISO 1133-1:2011. Density at 23°C is 0.940 g/cm³ by ASTM D1505. The grade is manufactured by high-pressure autoclave/tubular copolymerization; incorporation of vinyl acetate reduces crystallite thickness and lowers the melting peak relative to low-density polyethylene. This compositional position places EVA 2050 between low-VA extrusion coating grades and high-VA hot-melt or crosslinkable foam grades, making it suitable for injection moulded parts, masterbatch carriers, blown film sealant layers, and chemically crosslinked foam.
| Property | Test method | Nominal value |
|---|---|---|
| Vinyl acetate content | Internal solution hydrolysis/FTIR | 20 wt% |
| Melt mass-flow rate | ASTM D1238, 190°C/2.16 kg | 5.0 g/10 min |
| Density | ASTM D1505 | 0.940 g/cm³ |
| Melting peak temperature | ASTM D3418, 10°C/min | 84°C |
| Physical form | Visual inspection | Cylindrical pellets, no visible contamination |
Nominal values in the table are not sales specifications and vary with additive package and production campaign. The certificate of analysis for the specific lot governs exact moisture, ash, and stabiliser content. Condensed surface moisture is the main storage-related processing defect source. When pellets are transferred from cold warehousing at 5–10°C into a humid compounding area above 60% relative humidity, a 4 h drying step at 60°C in a dehumidifying hopper dryer with airflow of 1.5–2.0 m³/h per kg/h throughput is recommended. Drying temperature above 75°C or residence beyond 8 h can soften the pellets and cause bridging in the hopper throat.
Deacetylation of vinyl acetate segments begins at measurable rates near 220°C. Thermogravimetric analysis in nitrogen at 10°C/min typically shows 1% mass loss near 220–230°C and rapid deacetylation above 260°C. The liberated acetic acid attacks unprotected steel surfaces and can create brown specks, haze, and acidic odour in extrudate. In processing, barrel set temperatures should remain below 220°C; if high-temperature compounding is unavoidable, residence time below 2 min and atmospheric venting are required. Regrind containing 20–30 wt% of EVA 2050 should be monitored by melt flow ratio and yellowness index because chain scission during repeated heat histories lowers viscosity and increases colour.
Rheological characterisation by capillary rheometry at 190°C shows shear-thinning behaviour with a power-law index of 0.35–0.45 between 100 s⁻¹ and 1000 s⁻¹. This pseudoplasticity assists filling of thin-wall injection mould cavities but reduces melt elasticity relative to high-pressure LDPE. In a 40:1 co-rotating twin-screw extruder, EVA 2050 is compounded with silica, carbon black, or calcium carbonate using a barrel profile of 140–170°C and screw speed 250–350 rpm. Because viscous dissipation can raise melt temperature 10–20°C above the barrel set point, the practical processing window is narrow. The melt must remain above the 84°C melting peak to achieve full plasticisation, yet stay below 200°C to avoid acetic acid generation. Vacuum venting at -0.08 MPa gauge is recommended during filler dispersion to strip low-molecular-weight volatiles.
In injection moulding on a 120 t clamp machine with a 40 mm screw and L/D 22:1, EVA 2050 is processed at barrel temperatures of 170–200°C, nozzle temperature of 190°C, and mould temperature of 25–40°C. Injection pressure is 50–90 MPa, hold pressure 40–70 MPa, and back pressure 0.5–1.0 MPa. Mould shrinkage measured after 48 h at 23°C is 1.2–1.6% under ASTM D955. Premature ejection before the wall centre cools to 60°C causes surface depressions and warpage in flat parts. When EVA 2050 replaces a 5.0 g/10 min LDPE in an existing tool, cushion and hold-pressure settings require adjustment because the lower crystallinity reduces post-mould crystallisation shrinkage but increases gate-seal time.
Crosslinked EVA 2050 foam lines exploit the temperature separation between dicumyl peroxide crosslinking and azodicarbonamide decomposition. In the compounding stage, a Banbury or intermeshing kneader is held at 105–115°C to incorporate dicumyl peroxide, azodicarbonamide, zinc oxide, and stearic acid without premature reaction. Zinc oxide shifts the blowing agent decomposition onset from its intrinsic 205–215°C to 155–165°C. The sheet is then crosslinked at 160–180°C, during which dicumyl peroxide decomposition produces cumyloxy radicals and crosslinks ethylene sequences. In the expansion oven at 175–185°C, pressure decay permits liberated nitrogen and carbon monoxide to expand cells. Closed-cell sizes of 100–300 µm are typical when the gel fraction before expansion is 60–75%, measured by xylene extraction. The 20 wt% VA content of EVA 2050 reduces crystalline blocking of radical diffusion and gives more uniform crosslink distribution than a 15 wt% VA grade.
On continuous foam sheet lines, premature gas loss is controlled by maintaining head pressure at 8–12 MPa and melt temperature below 125°C at the die. A melt gear pump is used to reduce pressure pulsation; pressure variation above 0.5 MPa raises cell-size standard deviation by approximately 30 µm. The die temperature must be 15–20°C lower than the oven expansion temperature to prevent surface skin fracture; however, if the die is too cold, melt viscosity increases and causes melt fracture at the die lips. These process boundaries make pressure control more critical than throughput control when EVA 2050 is run on foam lines originally designed for LDPE.
Differences from other EVA products are most pronounced at the lower and upper VA limits. Reducing vinyl acetate from 20 wt% to 15 wt% raises the DSC melting peak by approximately 8–10°C and increases hardness by 4–6 Shore A points, but decreases filler wetting and low-temperature flexibility. Increasing VA to 28 wt% lowers the melting peak to approximately 73°C and improves elongation and tack, but raises blocking tendency during silo storage above 30°C and reduces dimensional stability of moulded parts. Compared with metallocene ethylene-octene polyolefins of similar melt index, EVA 2050 contains ester side groups that accept higher calcium carbonate loading without surface treatment; however, its thermal stability ceiling is lower because of acetic acid formation. Compared with LDPE, EVA 2050 exhibits lower seal initiation temperature, higher impact toughness at -20°C, and better adhesion to polyamide and tie-resin layers.
Film structures using EVA 2050 sealant layers benefit from lower seal initiation temperature, but the processing window must be controlled to avoid melt fracture and blocking. In a three-layer blown film line with a 35 mm die diameter and die gap 1.2–1.8 mm, the sealant layer is processed at 150–180°C while HDPE or polyamide structural layers are processed at their usual temperatures. A blow-up ratio of 2.0–3.0 and frost line height of 600–900 mm maintain bubble stability. Seal initiation temperature for EVA 2050 is approximately 85–95°C; however, published data for this specific film configuration is limited, so seal strength must be verified per ASTM F88 and hot tack per ASTM F1921 on the target packaging line. The polar vinyl acetate groups also reduce blocking resistance; if the sealant layer exceeds 15 µm, anti-block masterbatch or surface migration of erucamide is typically required above 25°C storage.
Calcium carbonate masterbatch production with EVA 2050 is normally run on a 65 mm twin-screw extruder with L/D 36:1 and a downstream side-feeder. Filler loading up to 40 wt% is feasible without surface treatment because the acetate group improves matrix-filler wetting. The side-feeder throat temperature should not exceed 60°C; higher temperatures cause filler compaction and screw torque variability. The resulting masterbatch is let down at 5–10 phr in blown film and injection moulding. When a high-VA grade at 28 wt% VA is substituted, torque decreases but pellet blocking increases; when a low-VA grade at 15 wt% VA is substituted, torque rises and filler dispersion quality deteriorates. EVA 2050 therefore occupies a practical mid-range for filled compounds.
Regulatory compliance is end-use dependent and requires migration testing on the final article. The following matrix identifies the relevant frameworks.
| Regulation or standard | Scope | EVA 2050 position |
|---|---|---|
| FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers for repeated food-contact use | Subject to end-use migration testing; 20 wt% VA content falls within the described scope |
| Regulation (EU) 10/2011 | Plastic materials and articles intended to contact food | Overall migration limit <10 mg/dm²; specific migration of vinyl acetate must be confirmed |
| Regulation (EC) No 1907/2006 (REACH) | Registration, authorisation, and restriction of chemicals | Polymer itself is exempt; imported monomer precursors require registration |
| Directive 2011/65/EU (RoHS) | Restriction of hazardous substances in homogeneous materials | Pb <1000 mg/kg; Cd <100 mg/kg; Hg <1000 mg/kg; Cr(VI) <1000 mg/kg; PBB and PBDE <1000 mg/kg |
Processors should avoid combining EVA 2050 with strong Lewis acids or amine-based additives in high-temperature compounding above 200°C, because those species can catalyse ester thermolysis and accelerate acetic acid release. Colour concentrates based on polyolefin carriers are acceptable at let-down ratios below 5%; higher ratios require validation by melt flow and yellowing index after 24 h at 150°C per ASTM E313. For radiation-sterilised applications, electron beam or gamma irradiation may induce crosslinking and discolouration; dose-response testing is required before specification.
