| HS Code | 198307 |
| Product | HANWHA EVA 2050 |
| Type | Ethylene Vinyl Acetate (EVA) Copolymer |
| Vinyl Acetate Content | 18% |
| Melt Flow Index | 2.0 g/10min (190°C, 2.16kg) |
| Density | 0.940 g/cm³ |
| Melting Point | 85°C |
| Vicat Softening Point | 65°C |
| Tensile Strength At Break | 22 MPa |
| Elongation At Break | 750% |
| Shore Hardness | 90 (Shore A) |
| Brittleness Temperature | -70°C |
| Applications | Films, sheets, injection molding, compounding |
As an accredited HANWHA EVA 2050 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Hanwha EVA 2050 is packaged in 25 kg net bags, palletized and stretch-wrapped for safe handling and storage. |
| Container Loading (20′ FCL) | Load HANWHA EVA 2050 (ethylene-vinyl acetate) into a 20′ FCL, packed in kraft/or PP bags on pallets, securely stowed and ventilated. |
| Shipping | HANWHA EVA 2050 ships as solid pellets in sealed bags, bulk bags, or hopper containers. Keep dry and away from heat sources to prevent clumping. Non-hazardous, but handle with standard PPE. Store in a cool, ventilated area during transit to preserve quality. |
| Storage | Store HANWHA EVA 2050 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture pickup and contamination. Avoid exposure to oxidizing agents. Maintain warehouse temperatures below 30°C, and follow first-in, first-out rotation to ensure product stability and quality. |
| Shelf Life | Shelf life is typically 24 months from manufacture when stored in original, unopened packaging under cool, dry conditions. |
In packaging hot-melt converting lines, Hanwha EVA 2050 is specified as the polymeric backbone at 25–40 wt% of the finished hot-melt formulation. The 20 wt% vinyl acetate content introduces polar ester groups that anchor to recycled corrugated board, clay-coated kraft, and cold-foil overwrap surfaces, while the 500 g/10 min melt flow rate, determined per ASTM D1238 at 190°C with 2.16 kg, holds application viscosity in the range required for high-speed slot-die and bead applicators. The mixing sequence in a jacketed horizontal sigma-blade kneader or a continuous twin-screw extruder with L/D 30:1–40:1 begins with dry blending EVA 2050 pellets and hindered phenolic antioxidant, followed by incremental addition of tackifier resin at 140–150°C, and final addition of paraffin wax or Fischer-Tropsch wax to adjust open time and set speed. The melt pool is held at 150–170°C; batch residence time in sigma-blade mixers is typically 60–90 min. Terminal packaging products include high-speed RSC case sealing, ECT-corrugated tray erecting for dairy multipacks, and wraparound sleeve bonding for bottled beverages. Compliance for food packaging is assessed under 21 CFR 175.105 for indirect food additives in adhesives, and formulators verify melt stability by viscosity after 24 h at 160°C per ASTM D3236 and color change within 3 Gardner units. Brookfield Thermosel viscosity at 160°C is typically held between 600–1,200 mPa·s for slot-die cut-off; when viscosity exceeds 1,400 mPa·s, tailing defects and die drool increase on multi-head case sealers.
From a process stability standpoint, the main conflict is between low application viscosity and melt pool thermal degradation. The high melt flow rate of EVA 2050 reduces pumping pressure and nozzle wear, but the same low molecular weight distribution shortens thermal stability at temperatures above 180°C. Accelerated shelf-ageing tests, conducted by holding finished adhesive at 160°C for 24 h in glass vessels under nitrogen, are used as the release criterion; a viscosity drift of more than ±7% or char formation on the vessel wall indicates antioxidant package failure or a contaminated tackifier stream. On multi-head case sealers, adhesive nozzles are run at 155–165°C with 0.2–0.5 mm orifice diameters; stringing is controlled by wax loading and nozzle temperature, not by raising EVA loading beyond 40 wt%, because excess polymer increases elastic recovery and cut-off failure at line speeds above 60 cases/min.
Perfect-bound book production lines running 8,000–12,000 cycles/h specify Hanwha EVA 2050 at 30–35 wt% of the spine glue, combined with rosin ester or C5/C9 hydrocarbon tackifier at 35–50 wt% and paraffin or microcrystalline wax at 10–20 wt%. The wheel pot temperature is maintained at 140–160°C; grooved transfer wheels and spine closing stations require a hot-melt viscosity below the stringing threshold, and the high melt flow rate of EVA 2050 permits 0.2–0.4 mm nozzle orifices without needle blockage. The downstream production process for a softcover book involves milling the folded signatures, applying primer or side glue at 0.5–1.0 mm thickness, forcing the cover around the book block at 0.4–0.6 MPa clamp pressure, and cooling the spine over 3–6 s before trim. Open time on uncoated paper is typically 2–5 s; on high-clay coated paper, formulators extend open time by reducing wax content by 3–5 wt% rather than raising pot temperature. Terminal products include softcover books, annual reports, catalogs, directories, and perfect-bound magazines. Compliance is confirmed by lot-to-lot melt flow rate per ISO 1133-1:2022 and hot-melt viscosity per ASTM D3236; REACH Article 33 declarable substances are verified when exported to EU converters. A known failure mode on high-speed binding lines is overheating of the transfer wheel above 170°C, which produces acetic acid migration and creates brown specks in the spine glue after 6 h pot residence; production logs therefore cap heating elements at 165°C and purge the pot after shift change. Published comparative data for this specific high-MFR grade in very high-speed binder lines is limited; field trials typically rely on the above viscosity and open time windows rather than fixed universal machine settings.
When slot-die coaters on wood edge banding lines are configured for hot-melt application onto high-pressure laminate, ABS, or melamine edge bands, Hanwha EVA 2050 is added at 20–30 wt% to the hot-melt formulation. The compounding process first disperses EVA 2050 with tackifier at 140–150°C, then incorporates Fischer-Tropsch wax at 10–15 wt% to achieve a short setting time between the slot die and the pressure roller. The slot die is maintained at 150–165°C with an application gap of 0.3–0.6 mm; board surface temperature is raised to 35–50°C before the edge band passes through multi-roller pressure stations at 20–40 m/min. Terminal products for this segment are office desk worktops, kitchen cabinet doors, wardrobe shelves, and store fixture panels. Compliance testing follows the nonstructural thermoplastic adhesive classification of EN 204 for heat resistance and water resistance, while melt viscosity is controlled per ASTM D3236 and VOC emissions are screened under EU REACH and national indoor air requirements. Overheating the slot die above 175°C causes stringing and adhesive carryover onto the visible panel edge; when this occurs, the coat weight is reduced by 5–10 g/m² rather than increasing temperature.
Color and additive masterbatch producers use Hanwha EVA 2050 as a carrier resin when high pigment wetting and low let-down ratios are more important than mechanical strength in the final polyolefin article. The carrier phase contains EVA 2050 at 50–70 wt% of the masterbatch, with pigment or additives at 30–50 wt% and a processing stabilizer package at 0.5–1.0 wt%; let-down ratios in LDPE/LLDPE film conversion are normally 2–5 wt%, corresponding to 0.1–1.0 wt% vinyl acetate copolymer in the final article. The production process uses a co-rotating twin-screw extruder with L/D 44:1, multiple side feeders, and a downstream underwater die-face pelletizer. Barrel temperatures are profiled from 120°C in the feed zone to 160°C at the die, with die pressure held below 12 MPa to limit shear-induced temperature rise. Because of the high vinyl acetate content, pelletizing water temperature is maintained below 40°C to prevent pellet agglomeration in the underwater die-face cutter. Terminal end products include pigmented PE stretch film, blow-molded HDPE bottles, injection-molded caps and closures, and extrusion-coated paperboard. Compliance for food-contact applications follows 21 CFR 177.1350 for ethylene-vinyl acetate copolymers, with melt flow rate stability before and after compounding checked per ISO 1133-1:2022 and ASTM D1238.
Profile wrapping of PVC, paper, and veneer onto MDF or aluminium profiles uses Hanwha EVA 2050 at 15–25 wt% in formulations previously based on EVA grades with MFR 2–25 g/10 min. The purpose of the replacement is to reduce oven or roll-coater application temperature from 165–175°C to 150–160°C while maintaining sufficient wet-out on cellulosic and flexible PVC films. The downstream process starts with profile preheating to 40–60°C, applies hot melt through a roll coater or slot nozzle at a coating weight of 40–80 g/m², then wraps the substrate through a forming shoe and calibrating stations at line speeds from 10–50 m/min. Terminal products include vinyl-wrapped window profiles, paper-wrapped MDF mouldings, and decorative aluminium trims used in furniture and architectural interiors. Adhesion is checked after 24 h conditioning at 23°C and 50% RH per ASTM D1876; heat resistance is assessed at 60°C under a 0.5 kg static load for 1 h, and emission performance is verified against EU REACH and national indoor air requirements. A processing boundary for this grade is that paraffin wax must remain below 10 wt% of the formulation, because the high melt flow rate of EVA 2050 combined with a high crystalline wax fraction causes rapid stress cracking on PVC films when wrapped parts are stored below 5°C.
As a wax-blend modifier for heat-sealable board coatings and investment casting pattern wax, Hanwha EVA 2050 is incorporated at 5–15 wt% of the total wax compound. The addition sequence uses a heated double-planetary mixer at 110–130°C: paraffin and microcrystalline wax are melted first, EVA 2050 pellets are added over 20–30 min under low-shear agitation, and tackifier or mineral filler is dispersed last. The downstream application for board coating is roll coating or curtain coating at 100–120°C onto corrugated board, while investment casting pattern wax is cast into rubber moulds at 70–85°C and allowed to cool without rapid quenching. Terminal products include water-resistant corrugated transit packaging, laminated board release layers, and prototype investment casting patterns for automotive and aerospace foundries. Viscosity is measured per ASTM D3236 at 120°C; needle penetration of the cooled blend is checked per ASTM D1321; and food packaging components are evaluated under 21 CFR 176.170 for paper and paperboard in contact with aqueous and fatty foods. The compatibility window is narrow: paraffin wax additions above 85 wt% cause EVA 2050 to phase-separate during slow cooling, producing a brittle surface skin rather than a uniform polymer-modified wax matrix.
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Hanwha EVA 2050 is an ethylene-vinyl acetate copolymer supplied as translucent pellets with a nominal vinyl acetate comonomer content of 20 wt% and a melt flow rate of 50 g/10 min measured at 190 °C under a 2.16 kg load in accordance with ASTM D1238-20 and ISO 1133-1:2022. Typical density is approximately 0.940 g/cm³ when conditioned at 23 °C and tested by ASTM D792-20. Technical trade literature for this product reports representative tensile strength at break near 8.8 MPa and elongation at break near 900% under ASTM D638-14, with Shore D hardness near 32 under ASTM D2240-15. These values are nominal and must be confirmed against the current certificate of analysis because melt flow rate and comonomer content vary within production tolerances.
| Property | Nominal value | Test method |
|---|---|---|
| Vinyl acetate content | 20 wt% | Producer internal FTIR method |
| Melt flow rate | 50 g/10 min | ASTM D1238-20 / ISO 1133-1:2022 |
| Density | 0.940 g/cm³ | ASTM D792-20 |
| Hardness | 32 Shore D | ASTM D2240-15 |
| Tensile strength at break | 8.8 MPa | ASTM D638-14 |
| Elongation at break | 900% | ASTM D638-14 |
At 20 wt% vinyl acetate, the polyethylene main-chain regularity is disrupted enough to depress the crystalline melting peak to approximately 76–80 °C as scanned at 10 °C/min under ASTM D3418-21. The same comonomer level reduces crystallite volume and flexural modulus, but it increases polarity through the acetate carbonyl group. This polarity shift improves wetting and hydrogen bonding on polar substrates such as corona-treated polyethylene, paperboard, and aluminium, although peel adhesion values remain formulation-specific. The loss of crystallinity also lowers Vicat softening temperature under ASTM D1525-17 and increases blocking tendency in warm warehouses above 30 °C. The material therefore occupies an intermediate position between low-VA grades that remain rigid and high-VA grades that are soft but difficult to pellet and store. The exact crystalline content should be calculated from bulk enthalpy with the producer’s reference heat-of-fusion value rather than inferred from melt temperature alone.
On a single-screw extruder with a barrier screw and 30:1 L/D ratio, EVA 2050 is processed using a flat-to-reverse temperature profile. Feed throat temperature is maintained at 30–40 °C to prevent pellet softening and bridging; barrel zones are set from 130 °C in the feed section to 170–180 °C at the metering section, and the adaptor and die are held between 180 °C and 190 °C. Melt screening through a 60/100/60 mesh pack removes gel particles and unmolten polymer agglomerates. Because of the 50 g/10 min melt flow rate, head pressure at a given screw speed is lower than for a 20 wt% VA grade with a 10 g/10 min melt flow rate; this permits higher throughput but can lead to screw surging if back pressure falls below 50 bar. The melt should not be held above 230 °C, because acetate side groups undergo thermal elimination to acetic acid. The resulting acid can corrode downstream die steel and shift pH in water-bath cooling. If the resin has been exposed to relative humidity above 60%, a 4-h dry at 60 °C in a desiccant hopper is required to prevent steam streaking and void formation.
In hot-melt adhesive operations, EVA 2050 serves as a high-melt-flow polymer base because its viscosity under ASTM D3236-88 is substantially lower than that of a 10 g/10 min EVA of the same comonomer content. Viscosity is measured with a Brookfield Thermosel spindle 27 at 180 °C, but no single value applies to the neat resin because commercial adhesives contain tackifier resins, oils, waxes, and antioxidants. The polymer phase reduces melt elasticity and improves pump fill in gear-pump coating heads, but it also limits maximum tank residence time. Oxidative chain scission in the polymer and tackifier phase leads to viscosity drift, color increase under ASTM D1544, and char formation. Nitrogen blanketing, 100 µm cartridge filtration, and continuous temperature control within ±5 °C of the setpoint limit char transfer to slot-die shims. Equipment operators should avoid amine-based pH modifiers, because amine residues can catalyze ester degradation and generate odor in the melt.
Compared with lower-vinyl acetate grades, EVA 2050 exhibits lower tensile modulus and greater low-temperature flexibility, but the higher VA content also raises susceptibility to oxidative discoloration and acetic acid release. A 13 wt% VA copolymer retains higher crystalline order, making it better suited to film and extrusion-coating lines where melt strength and heat resistance govern. A 28 wt% VA grade provides stronger adhesion to polar yarns and nonwovens but typically requires chilled pellet handling and may not survive long ambient storage without talc coating. Within the same VA level, a lower-MI grade with 10 g/10 min melt flow rate generally shows higher cohesive strength and creep resistance under ISO 899-1:2017, whereas EVA 2050 is selected for thin-flow-path molds, low-pressure extrusion, and higher filler loadings. The product therefore competes on viscosity reduction rather than on maximum heat resistance. Tensile creep and shear adhesion tests should be performed on pretreated substrates to compare candidate resins; published data for this specific configuration is limited.
In slot-die coating, a lip gap of 0.5–0.8 mm and coating-head angle of 15–25° from vertical are typical starting points, but coat weight is controlled primarily by pump speed and line speed rather than lip gap alone. For LDPE substrates, corona treatment should deliver at least 38 dyn/cm surface energy, measured by wetting fluids, before adhesive application; lower surface energy leads to dewetting and intermittent bond strength. The high melt flow rate of EVA 2050 permits lower gear-pump discharge pressure, but it also reduces melt bank stability at the die exit if the gap is uneven beyond 0.05 mm edge-to-edge variation.
High melt flow reduces the pressure drop across screen changers and improves wetting of pigment surfaces, but it also reduces the shear heating required to break down pigment agglomerates. In a co-rotating twin-screw extruder with 40:1 L/D, dispersion is maintained by using kneading blocks and left-handed elements rather than by relying on high melt viscosity alone. Specific energy input is typically 0.18–0.25 kWh/kg for organic pigments and 0.25–0.32 kWh/kg for carbon black at 60 wt% masterbatch loadings, though published data for this specific configuration is limited and torque logging should define the actual line signature. Die melt temperature is kept below 220 °C, and the vacuum vent is placed after the kneading zone to strip acetic acid and moisture before pelletizing. Underwater pelletizing knives require corrosion-resistant surfaces because trace acetic acid accelerates wear on carbon steel. Campaign shutdowns use a low-MI polyethylene purge with 0 wt% pigment until die pressure returns to the clean-machine baseline.
In chemically foamed formulations, the low crystallinity of EVA 2050 delays solidification and widens the expansion window relative to LDPE. Foam density from 0.15 to 0.25 g/cm³ can be reached on a single-screw line with a 25:1 L/D screw and 0.8–1.2 wt% azodicarbonamide masterbatch, provided that die melt temperature is controlled between 120 °C and 130 °C and the die land length is sufficient to prevent premature cell coalescence. Zinc stearate used as a process lubricant accelerates transesterification and gel formation at elevated temperature, producing visible specks in the profile. Frequent screen changes and lower barrel temperatures in the decompression zone mitigate the defect. The high melt flow rate reduces melt strength; therefore vertical foam lines may require a straightening die and a 3-zone pneumatic cooling ring to stabilize the profile before haul-off.
For food contact applications, ethylene-vinyl acetate copolymers may be covered under FDA 21 CFR 177.1350, but end-use articles must satisfy the specified extractives limits and any applicable food-type restrictions. In the European Union, compliance with Regulation (EU) 10/2011 requires migration testing on the finished article, not on the resin alone. The product is not a drop-in approval; formulators must obtain specific migration data with the intended food simulant. During storage, pellets should be kept below 30 °C and protected from direct sunlight to minimize blocking and oxidation. Open bags should be consumed within 24 h when ambient relative humidity exceeds 60%.
