| HS Code | 392460 |
| Vinyl Acetate Content | 25% |
| Melt Flow Rate 190 C 2 16kg | 50 g/10min |
| Density | 0.950 g/cm3 |
| Melting Point | 70 °C |
| Vicat Softening Point | 50 °C |
| Tensile Strength | 3.5 MPa |
| Elongation At Break | 600% |
| Hardness Shore A | 68 |
| Glass Transition Temperature | -60 °C |
| Physical Form | Pellets |
As an accredited HANWHA EVA 2250 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 2250 resin pellets are packaged in 25 kg polyethylene-lined paper bags, palletized and shrink-wrapped for safe handling. |
| Container Loading (20′ FCL) | 20′ FCL loading of HANWHA EVA 2250 in 25 kg bags, approximately 10–12 metric tons per container, securely palletized and ventilated. |
| Shipping | HANWHA EVA 2250 is a non-hazardous ethylene-vinyl acetate copolymer resin supplied as virgin pellets. Packed in 25 kg bags on shrink-wrapped pallets, suitable for standard container transport. Not regulated under IMDG, ADR, or IATA. Keep dry, away from heat and prolonged sunlight during shipment and storage. |
| Storage | Store HANWHA EVA 2250 in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep in its original sealed packaging to prevent moisture absorption and contamination. Avoid contact with strong oxidizers. Maintain moderate temperatures to preserve handling and processing characteristics. No special hazardous storage required if conditions are controlled. |
| Shelf Life | Store in a cool, dry place away from direct sunlight. Shelf life is typically 12 months from date of manufacture. |
In corrugated case-sealing lines running above 45 m/min, hot-melt adhesives require a Brookfield viscosity below 1,500 mPa·s at 175 °C to prevent stringing on the compression section. HANWHA EVA 2250 is introduced as the polymer backbone at 20–40 wt% of the formulation. The 22 wt% vinyl acetate content disrupts polyethylene crystallinity and improves wetting on clay-coated Kraft and OPP substrates, while the 25 g/10 min melt flow rate under ASTM D1238-23 conditions limits viscosity drift during high-speed cycling. Batch-to-batch open-time variation in fixed-format bookbinding lines has been observed to remain within ±10 s when EVA 2250 is pre-blended with the wax phase before tackifier addition; reversing that sequence reduces heat-seal peel values by 15–20% under ASTM D1876 on corrugated board.
Formulation limits for case sealing and bookbinding are EVA 2250 20–40 wt%, hydrogenated rosin ester tackifier 30–45 wt%, Fischer-Tropsch wax 10–30 wt%, and hindered phenolic antioxidant 0.3–1.0 wt%. Compounding is performed in jacketed sigma-blade mixers or continuous hot-melt extruders at 160–180 °C, with batch residence time 45–90 min. Above 190 °C, measurable acetic acid evolution from the vinyl acetate segment accelerates; melt line temperature alarms are typically set at 185 °C to limit char formation on heated hoses. Indirect food-contact applications fall under FDA 21 CFR 175.105 for adhesives, and EU supplies require REACH SVHC confirmation from the compounder. End products include corrugated case and carton sealing, bookbinding spine glues, nonwoven lamination, and edge banding pre-coating.
Color masterbatch carriers based on LLDPE with a melt index below 5 g/10 min often leave undispersed pigment agglomerates above 10 µm because shear stress at the die land is insufficient to overcome pigment-pigment van der Waals cohesion. EVA 2250 replaces 20–60 wt% of the LLDPE carrier in polyolefin masterbatch to lower melt viscosity and increase polar interaction with organic pigments and flame-retardant fillers. The 22 wt% vinyl acetate content provides hydrogen-bond acceptors for pigment surface treatments, reducing filter-pressure rise during extrusion and improving color strength development on blown-film lines.
In a typical color concentrate, EVA 2250 is used at 50–80 wt% of the carrier phase, pigment at 20–40 wt%, and processing stabilizer at 0.1–0.5 wt%. For additive masterbatches, active slip or antiblock loading may be 10–30 wt% with the balance EVA 2250 and LDPE. Compounding is run on a co-rotating twin-screw extruder with L/D 44:1, temperature zones 100–180 °C, screw speed 400–800 rpm, and underwater pelletization. Pre-drying is required at 70 °C for 2–4 h if incoming moisture exceeds 0.05 wt%; hydrolytic degradation produces acetic acid that corrodes downstream pellet dryers and screen changers. Where masterbatch is used in food-contact packaging, the final film must comply with FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers and EU Regulation 10/2011 Annex I overall migration limits. End products include color concentrates for PE blown film and injection moulding, flame-retardant masterbatch, and slip/antiblock concentrates.
Fully refined paraffin wax with a congealing point of 58–62 °C exhibits brittle cracking below 5 °C on scored paperboard and loses scuff resistance on high-speed corrugated packaging lines. Addition of EVA 2250 at 2–10 wt% introduces amorphous vinyl acetate domains that act as flexibilizing discontinuities in the wax crystal matrix. Bend tests at 0 °C on modified saturating wax show fewer visible cracks than unmodified paraffin; however, published quantitative flexural data for this specific wax grade and board caliper combination is limited, and line trials are required for calipers above 600 µm.
Blending is performed in a stirred, jacketed vessel at 120–140 °C. EVA pellets are added at less than 1 kg/min per 100 kg paraffin batch to avoid localized gel formation, followed by high-shear dispersion for 30–60 min. Temperatures above 150 °C accelerate vinyl acetate elimination and darken the wax. Compliance for paperboard food-service packaging falls under FDA 21 CFR 176.170; candle and non-food applications are evaluated under REACH and ASTM F2417 for candle fire safety where applicable. End products include paperboard food-service packaging, water-resistant corrugated stock, candle over-dips, and scuff-resistant display cartons.
At −5 °C, oxidized bitumen roofing membranes with softening points above 100 °C often fall below 2% elongation in cold-flex testing under ASTM D5147. EVA 2250 is melt-blended at 2–6 wt% into oxidized bitumen to increase low-temperature elongation while avoiding the high toluene-soluble fractions associated with certain SBS block copolymers. The 22 wt% vinyl acetate content contributes polar interactions with the asphaltene fraction, reducing phase separation under torch-applied heat cycling and improving membrane dimensional stability on vertical walls.
Formulation is EVA 2250 2–6 wt%, calcium carbonate filler 20–40 wt%, and stabilizer 0.1–0.3 wt%. Digestion is carried out in a high-shear mixer or colloid mill at 170–190 °C for 60–120 min; a torque plateau indicates polymer dispersion, while a rising torque after 60 min suggests undispersed gel. The temperature must not exceed 200 °C because EVA deacetylation and bitumen oxidation accelerate viscosity build beyond pumpable limits. Compliance includes EN 13707 for flexible sheets for waterproofing and ASTM D6222 for polyester-reinforced roofing membranes. End products include APP/EVA modified bituminous waterproofing membranes, torch-applied base sheets, and self-adhesive underlayments. Published data for EVA 2250 loadings above 8 wt% in torch-applied bitumen are limited; viscosity may exceed equipment limits without process oil adjustment.
When mineral-filled polyolefin cable jackets are compounded with 150–200 phr of aluminium trihydroxide, LLDPE-only matrices frequently show elongation below 150% and poor filler dispersion. Replacing 10–30 phr of the LLDPE phase with EVA 2250 lowers melt viscosity during filler side-feeding and raises char integrity in cone calorimeter tests. The 22 wt% vinyl acetate segment improves adhesion to ATH and magnesium dihydroxide, reducing agglomeration and surface pinholes that trigger electrical breakdown in thin-wall insulation.
Formulation is LLDPE/EVA 2250 polymer phase 100 phr, ATH or magnesium dihydroxide filler 120–180 phr, vinyl silane coupling agent 0.5–1.5 wt% of filler, and antioxidant 0.2–0.5 phr. Processing uses a co-rotating twin-screw extruder with L/D 40:1, barrel profile 120–165 °C, and filler introduced downstream after polymer melting. Vent port flooding occurs when the side-feeding rate exceeds melting capacity; die pressure at the screen changer typically remains below 60 bar on a 75-mm machine. Electrical and fire standards include IEC 60332-1-2, IEC 61034-2, IEC 60754-2, UL 94 V-0 at specified thickness, and RoHS heavy-metal restrictions. Amine-based flame retardants must be avoided because amine groups catalyze deacetylation of the vinyl acetate comonomer and cause premature crosslinking. Pre-dry EVA 2250 at 60 °C for 3 h when exposed to relative humidity above 60%. End products include halogen-free building wire sheathing, control cable jackets, and photovoltaic string cable insulation.
| Test standard | Parameter | Common acceptance target |
|---|---|---|
| IEC 60332-1-2 | Vertical flame spread | Char height ≤ 425 mm |
| IEC 61034-2 | Smoke density | Light transmittance ≥ 60% |
| IEC 60754-2 | Acidity | pH ≥ 4.3 |
| UL 94 | Flame class | V-0 at target thickness |
On high-traffic asphalt surfaces, thermoplastic road marking formulations must develop no-pickup time below 2–6 min under ambient 10–30 °C while retaining glass bead adhesion under wet night visibility tests. EVA 2250 is introduced at 5–15 wt% of the total melt mix; hydrocarbon resin tackifier at 20–35 wt%; plasticizer oil at 2–5 wt%; titanium dioxide and glass beads at 20–40 wt%; calcium carbonate filler 15–30 wt%. The 22 wt% vinyl acetate content provides adhesion to asphalt and glass bead surface silanes, while the 25 g/10 min melt flow rate supports low-pressure spray application through ribbon guns.
Application temperature in a thermostatically controlled pre-melter is held at 180–200 °C; material is applied by screed box or ribbon gun at 180–200 °C. Overheating above 210 °C releases acetic acid and accelerates yellowing of the white TiO₂ fraction. Compliance includes EN 1436 for road marking performance, AASHTO M249 for thermoplastic traffic marking, and ASTM D4797 for adhesion to concrete. End products include high-traffic intersection markings, airport taxiway markings, and cycle lane delineation.
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Designated as an ethylene-vinyl acetate copolymer for flexible fabrication and adhesive compounding, HANWHA EVA 2250 is produced with a nominal vinyl acetate content of 22.0 wt% and a melt mass-flow rate of 5.0 g/10 min under ASTM D1238 at 190 °C with 2.16 kg. The grade combines reduced polyethylene crystallinity with polar acetate functionality, making it applicable in heat-seal layers, hot-melt base polymers, peroxide-crosslinked foams, and polymer modification. A typical density of 0.947 g/cm³ measured under ASTM D1505 reflects the acetate-rich architecture. Table 1 lists manufacturer-reported typical values. These values are target values from technical data literature, not batch-release specifications; each lot requires a certificate of analysis for process qualification.
| Property | Test method | Typical value |
|---|---|---|
| Vinyl acetate content | ISO 8985:2022 | 22.0 wt% |
| Melt mass-flow rate | ASTM D1238 | 5.0 g/10 min at 190 °C/2.16 kg |
| Density | ASTM D1505 | 0.947 g/cm³ |
| Tensile strength at break | ASTM D638-14 | 14.0 MPa |
| Elongation at break | ASTM D638-14 | 750% |
| Shore A hardness | ASTM D2240 | 84 |
| Vicat softening temperature | ASTM D1525 | 56 °C |
| Melting peak | ASTM D3418 | 72 °C |
Vinyl acetate insertion along the ethylene backbone disrupts polyethylene crystallinity, lowering the onset of melting and reducing tensile modulus. Differential scanning calorimetry under ASTM D3418 records a melting peak near 72 °C for EVA 2250, whereas unmodified LDPE grades typically crystallize above 110 °C. The reduction in crystalline lamellar thickness also lowers Vicat softening temperature to approximately 56 °C under ASTM D1525, which extends the heat-seal initiation temperature downward in flexible packaging structures. The polar acetate group increases surface energy and improves wetting on aluminium foil and corona-treated polyethylene terephthalate. Comparative peel adhesion on stainless steel under ASTM D6862 at 180° peel angle and 300 mm/min jaw separation is higher for 22 wt% VA grades than for 15 wt% VA grades, although exact values depend on tackifier loading and coating weight. Published data for EVA 2250 in high-speed cast-film sealing configurations is limited; pilot verification on the intended packaging line remains necessary.
Extrusion and compounding of EVA 2250 require barrel temperature settings in the range of 150 °C to 190 °C and a melt temperature below 210 °C to limit deacetylation. On twin-screw lines with L/D ratios of 25:1 to 32:1 and moderate shear profiles, melt pressure should be monitored at the die to prevent dead zones. Acetic acid generated by excessive heat or extended residence time attacks downstream metal surfaces and creates pin-holing in cast film. Residence time in stagnant regions should not exceed 10 min when the compound contains peroxide or blowing agent residues. Pre-drying at 60 °C to 70 °C for 4 h is recommended when ambient relative humidity exceeds 60%, not because EVA 2250 is strongly hygroscopic but because polar additives and regrind can carry surface moisture into the melt.
Peroxide-initiated crosslinking of EVA 2250 is used in midsole and block-foam production. In internal mixers or open mills, dicumyl peroxide at 0.5–1.5 phr and azodicarbonamide at 2.0–5.0 phr are incorporated at stock temperatures of 95–110 °C. The cure window for standard compression molding is 150–175 °C, with press cycle times of 8–15 min for sheet thicknesses near 10 mm. Split mold venting is required because acetic acid and blowing gas release can cause internal blistering when pressure is removed too quickly. Multi-cavity midsole tools in the 80–120 tonnes clamp force range commonly produce apparent density from 0.15 to 0.30 g/cm³, depending on blowing agent level and cure efficiency. Compared with lower-VA EVA grades, EVA 2250 gives lower melt viscosity and softer foam hardness at equivalent crosslink density; Shore A hardness values under ASTM D2240 shift downward by approximately 10–15 points relative to 15 wt% VA foams tested at 23 °C.
Adhesion to aluminium and corona-treated polyester is exploited in coextrusion and extrusion coating. EVA 2250 is processed in polyolefin equipment without major modification, but screw recovery time in injection molding can lengthen because the material is softer and less crystalline than LDPE. In hot-melt adhesive compounding, the grade is let down with tackifier resins, waxes, and antioxidant packages at addition levels of 20–40 wt%. Open time is influenced by wax type; paraffin systems shorten open time below 10 s, while Fischer-Tropsch waxes extend it beyond 15 s at 150 °C. The acetate content contributes to cohesion on paper, polyolefin, and aluminium substrates. In polymer modification, EVA 2250 serves as a flexibilizer for LDPE and polypropylene but should not be used with incompatible condensation resins without testing.
Compliance status for EVA 2250 must be confirmed against the final compound because additives, crosslinkers, and colorants influence migration and end-use conformity. Ethylene-vinyl acetate copolymers of this composition can be evaluated under 21 CFR 177.1350 for food-contact use, but migration testing for the specific additive package and thickness is required. Table 2 summarizes applicable standard designations. The resin is not antistatic and can accumulate surface charge during blown-film production; static dissipative measures may be needed when film speed exceeds 80 m/min. Avoid amine-based additives that can catalyze deacetylation and shift pH in hot-melt formulations. Processing above 230 °C is not recommended because gel formation and acetic acid evolution become measurable in TGA under nitrogen.
| Regulatory or test standard | Applicability | Notes |
|---|---|---|
| 21 CFR 177.1350 | Food-contact EVA copolymer | Subject to end-use extraction limits |
| REACH | EU monomer registration | SVHC confirmation required for imports |
| RoHS 2011/65/EU | Heavy metal restrictions | Not expected to contain Pb, Cd, Hg, Cr(VI) |
| ISO 1133-1:2022 | Melt mass-flow rate | Condition 190 °C/2.16 kg |
Filled compounds based on EVA 2250 are used in calendered sheet, wire and cable fillers, and sound-damping articles. Calcium carbonate loadings of 20–40 wt% increase stiffness and reduce cost but lower tear strength; silica raises hardness and wet-out but reduces flow through narrow dies. In comparison with LLDPE, EVA 2250 offers lower sealing initiation temperature, higher clarity in blown film, and stronger adhesion to polar substrates. Compared with EVA grades containing 28 wt% or 33 wt% vinyl acetate, EVA 2250 retains better pellet stability and less surface tack during storage, but it provides lower oil resistance and lower ultimate adhesion to highly plasticized PVC. Storage in dry conditions below 30 °C preserves pellet flow; block formation in bulk silos becomes possible when storage temperature exceeds 35 °C for extended periods. Published data for this specific grade in photovoltaic encapsulant extrusion is limited, and end-use qualification under IEC 61215 requires additional weathering and crosslinking studies.
