| HS Code | 240783 |
| Product Name | HANWHA EVA 1828 |
| Chemical Family | Ethylene Vinyl Acetate Copolymer |
| Vinyl Acetate Content | 18% |
| Melt Flow Index | 28 g/10 min at 190°C, 2.16 kg |
| Density | 0.936 g/cm³ |
| Melting Point | 78°C |
| Vicat Softening Point | 60°C |
| Brittleness Temperature | -70°C |
| Tensile Strength | 145 kg/cm² |
| Elongation At Break | 800% |
| Hardness | 92 Shore A |
| Appearance | Transparent or translucent pellets |
As an accredited HANWHA EVA 1828 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1828 is supplied in 25 kg polyethylene-lined kraft bags, ensuring moisture protection, product purity, and safe handling. |
| Container Loading (20′ FCL) | 20′ FCL: HANWHA EVA 1828 packed in 25kg bags on pallets, securely loaded and containerized for transport. |
| Shipping | HANWHA EVA 1828 is an ethylene-vinyl acetate copolymer resin supplied as solid pellets. For shipping, it is non-hazardous and transported in sealed bags or bulk containers. Store away from heat, ignition sources, and moisture to prevent agglomeration. Protect packaging from damage and keep containers dry to maintain product quality. |
| Storage | Store Hanwha EVA 1828 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and ignition sources. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid exposure to strong oxidizers. Maintain moderate temperatures to prevent sticking or deformation of the resin pellets. Use proper handling and storage practices to preserve product quality. |
| Shelf Life | Shelf life is 12 months from manufacture when stored unopened in original packaging in cool, dry conditions. |
At the injection-foaming cell of a two-station rotary footwear line, HANWHA EVA 1828 is charged as the base resin at 100 parts by mass because the 18 wt% vinyl acetate content and 2.8 g/10 min melt index measured under ASTM D1238-20 at 190°C/2.16 kg deliver a balance of melt strength and shot-volume reproducibility. Representative expandable formulations use azodicarbonamide at 1.2–3.0 phr, dicumyl peroxide at 0.6–1.2 phr, zinc oxide at 0.8–1.2 phr, zinc stearate at 0.4–0.8 phr, and calcium carbonate at 0–15 phr. Mixing on a Banbury internal mixer is discharged at 100–110°C, then transferred to a two-roll mill for homogenization before the injection unit. Injection barrel temperatures are held at 150–170°C, nozzle temperature 160–175°C, and mold temperature 175–185°C; clamp force is typically 180–250 metric tons with a mold fill ratio of 70–80% and cure time of 7–12 min depending on midsole thickness. For compliance, finished footwear components are screened against REACH Annex XVII entry 50 for restricted polycyclic aromatic hydrocarbons and against AfPS GS 2019:01 PAH limits for skin-contact materials. Terminal part types include running-shoe midsoles, unit bottoms, sandals, and slipper soles. If the resin moisture content exceeds 0.02%, pre-drying at 70–80°C for 4–6 h is required to prevent surface pitting and inconsistent cell structure. Published cell-density data for this specific grade on rotary injection equipment are limited; mold trials on the actual shot weight and gate geometry remain the decisive method for setting blowing-agent loading.
In halogen-free flame-retardant sheathing compounds, EVA 1828 is selected because the 18 wt% vinyl acetate comonomer increases polarity enough to wet high loadings of aluminum trihydrate and magnesium dihydrate without the filler-surface dewetting observed in LDPE matrices. A representative production formulation on a co-rotating twin-screw extruder with L/D 48:1 and twelve segmented barrels charges 100 parts EVA 1828, 120–180 parts aluminum trihydrate, 20–50 parts magnesium dihydrate, 0.8–1.5 parts vinyl silane coupling agent, 0.3–0.5 parts hindered phenolic antioxidant, 1.0–2.0 parts paraffin wax, and 2.0–4.0 parts processing aid. The extruder temperature profile is set from 140°C at the feed zone to 180°C at the die, followed by water-ring pelletizing and drying to 0.02% maximum moisture. Sheathing is applied on a single-screw extruder with L/D 25:1, compression ratio 2.5:1, and a 40/80/40 mesh screen pack; melt temperature during sheathing is controlled between 150°C and 165°C. Compliance test protocols include IEC 60332-1-2 for vertical flame propagation, IEC 60754-1/2 for acid gas evolution, IEC 61034-1/2 for smoke density, IEC 60502-1 for low-voltage cable construction, and EN 50267-2-2 for halogen acid gas. Terminal products covered by this configuration are single-core low-voltage power cable sheathing, control cable jackets, and instrumentation cable jackets.
Operational boundaries are determined by filler cation chemistry and melt compounding residence time. Uncoated magnesium dihydrate and amine-functional stabilizers should be avoided because acid-base interactions with vinyl acetate groups can increase moisture uptake and reduce elongation below the minimum retained elongation specified in IEC 60502-1. Batch-to-batch variation in aluminum trihydrate particle size distribution can lower limiting oxygen index measured under ISO 4589-2 and require rebalancing filler loading against tensile properties, so incoming filler is screened by laser diffraction for d50 consistency. Published comparative data for this exact EVA 1828 grade in HFFR matrices are limited, so the upper filler limit is confirmed by compounding trials on the target line rather than by extrapolating from general EVA data.
EVA 1828 is dispersed as the polymer backbone in high-viscosity hot melt adhesives where the 2.8 g/10 min melt index corresponds to a moderate molecular weight and a slower open time in profile wrapping and edge banding. The formulation window is 20–35 wt% EVA 1828, 25–45 wt% hydrogenated C9 tackifier, 15–30 wt% Fischer-Tropsch wax, 0.5–1.0 wt% hindered phenolic antioxidant, and 0–0.5 wt% nucleating agent. Production is carried out in a jacketed sigma-blade mixer at 160–175°C under nitrogen, with EVA 1828 charged first, tackifier added in thirds to prevent localized cooling, and total mixing time held at 90–120 min; vacuum deaeration at -0.08 MPa for 20 min removes residual water and prevents bubble defects in slot-die coating. Molten viscosity is checked at 180°C according to ASTM D3236, and softening point is measured by ASTM E28. For food packaging adhesive applications, compliance is established under FDA 21 CFR 175.105; the final adhesive is assessed under REACH. Terminal product types include edge banding adhesives, bookbinding adhesives, profile wrapping adhesives, and carton-sealing adhesives. Tackifiers with an acid number above 5 mg KOH/g are excluded because residual acidity can catalyze vinyl acetate deacetylation and increase viscosity drift during prolonged application at 180°C.
EVA 1828 is introduced as the high-VA component in chemically crosslinked polyolefin foam sheet to raise melt elasticity and broaden the expansion window during azodicarbonamide decomposition. A starting formulation uses 70–100 parts EVA 1828, 0–30 parts LDPE, 8–15 parts azodicarbonamide, 0.8–1.4 parts dicumyl peroxide, 1–2 parts zinc oxide, 5–20 parts talc, and 0.5 part stearic acid. The compound is mixed on a two-roll mill at 90–110°C and then sheeted for hot-press crosslinking and expansion; the press is held at 160–175°C under 10–15 MPa for 8–12 min, after which secondary expansion is performed in an oven at 70–80°C for 20–40 min. Physical tests follow ASTM D3575 for flexible cellular materials, ISO 845 for apparent density, ISO 1798 for tensile properties, and FMVSS 302 for flammability where automotive interior use is targeted; chemical compliance is reviewed under REACH. Terminal foam types include gym mats, yoga blocks, pipe insulation, and automotive trunk liners. Melt temperature above 185°C must be avoided before the press cure because premature azodicarbonamide decomposition and gas loss generate surface pinholes in thick sections; this is the principal processing boundary observed on production lines with long discharge distances between the mill and the press.
When carbon black masterbatch formulations require higher polar pigment wetting than LLDPE, EVA 1828 is used as the carrier phase at 50–65 wt% with carbon black at 25–40 wt%, polyethylene wax at 5–10 wt%, zinc stearate at 1–3 wt%, and antioxidant at 0.3–0.5 wt%. The compound is produced on a co-rotating twin-screw extruder with L/D 40:1 and twelve barrels, with barrel temperatures from 120°C at the feed throat to 180°C at the die, followed by strand pelletizing. Letdown ratios in LDPE/LLDPE film extrusion are set between 2 and 5 phr depending on film gauge and pigment particle size. Raw-material control includes ISO 1133-1:2022 for melt index, ISO 1183-1 and ASTM D1505 for density, and REACH registration for the carrier resin. Terminal products include black masterbatches for agricultural film, additive concentrates, and impact-modifier carriers for polyolefin injection goods. The configuration is not selected for high-clarity film applications because carbon black filler interactions increase back pressure and reduce clarity; published data for this specific EVA 1828 carrier application are limited, so letdown ratio is confirmed by film trials on the target line.
Under high-shear bitumen modification at 180–190°C, EVA 1828 is incorporated at 5–10 wt% into oxidized bitumen to raise the ring-and-ball softening point and reduce low-temperature brittleness in torch-applied waterproofing membranes. A production formulation uses oxidized bitumen at 80–90 wt%, EVA 1828 at 5–10 wt%, optional SBS at 3–7 wt%, mineral filler at 0–15 wt%, and processing stabilizer at 0.2–0.5 wt%. Mixing occurs in a vertical high-shear mixer with rotor tip speed 15–22 m/s for 90–150 min, after which the modified bitumen is held at 170°C for polyester carrier impregnation. Standards applied to the final membrane include EN 13707 for flexible sheets for waterproofing, ASTM D36 for softening point, and EN 1426 for needle penetration. Terminal products are torch-on waterproofing membranes and bridge deck waterproofing sheets. The bitumen phase must not exceed 200°C; prolonged high-temperature residence can deacetylate EVA 1828 and shift viscosity, so the polymer is added slowly under high shear to prevent phase separation.
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HANWHA EVA 1828 is an ethylene-vinyl acetate copolymer grade with a published vinyl acetate content of 18 wt% and a melt flow index of 2.8 g/10 min under ASTM D1238-20 at 190 °C and 2.16 kg. The density is typically 0.940 g/cm³ when measured by ASTM D1505-18. The copolymer occupies the intermediate-polarity EVA band: it has a higher dipole density than 9–15 wt% ethylene-vinyl acetate grades and remains stiffer and less tacky than 25–28 wt% grades. The vinyl acetate carbonyl absorbance near 1,740 cm⁻¹ provides a measurable difference from nonpolar polyethylene. The molecular architecture reduces crystallite size and melting point relative to LDPE, lowering seal-initiation temperature while requiring reduced barrel-temperature settings in extrusion and injection molding.
Thermal analysis under ASTM D3418-15 places the melting range of 18 wt% VA EVA generally between 82 °C and 86 °C, compared with 89–95 °C for low-VA grades and 70–75 °C for high-VA grades. The lower crystalline fraction reduces storage modulus and broadens the softening interval. In extrusion, the 2.8 g/10 min melt flow index balances flow and melt strength; capillary rheometry at 190 °C shows shear-thinning behavior that supports thin-wall profile extrusion while retaining sufficient bubble strength for blown film. On a co-rotating twin-screw extruder with an L/D 40:1 barrel and vacuum venting, EVA 1828 is commonly processed between 170 °C and 190 °C for filler dispersion. Above 210 °C, cumulative thermal deacetylation becomes a processing variable: acetic acid evolution increases with residence time and can corrode die lips and calibrator tooling. The practical upper melt temperature for extended runs is therefore 210 °C, and excursions above 230 °C are limited to short purges. When pellets have been exposed to relative humidity above 60%, pre-drying at 60–70 °C for 2–4 h is used to reduce surface moisture and prevent steam-induced surface defects in extrudates.
In halogen-free cable compounds, EVA 1828 is used as a polar carrier for magnesium hydroxide and aluminium trihydrate. The 18 wt% vinyl acetate fraction improves filler wetting compared with low-VA polyethylene; however, the lower melting point excludes the same high-temperature dispersive mixing conditions typical for LDPE. Compounding lines therefore operate at barrel settings between 160 °C and 190 °C and rely on kneading-block shear rather than elevated melt temperature to break filler agglomerates. Torque monitoring on a 40:1 L/D co-rotating extruder provides an early indication of filler wetting instability; screw slippage and melt-pressure oscillation may occur when calcium carbonate or magnesium hydroxide loading exceeds the wetting limit for the selected screw design. For masterbatch production, strand pelletizing requires cooling-water temperature below 25 °C because the low crystallinity of EVA 1828 increases surface tack relative to LDPE.
EVA 1828 is processed into chemically crosslinked closed-cell foam for gaskets, footwear midsoles, and thermal insulation. The melt index of 2.8 g/10 min is low enough to retain gas generated by azodicarbonamide blowing agents, which decompose near 190–210 °C. This decomposition range overlaps with the safe melt-temperature window of the copolymer, creating a process conflict: the melt must be hot enough to activate the blowing agent but cool enough to avoid deacetylation above 210 °C. The resulting process window is approximately 20 °C and is further constrained by the scorch time of the added organic peroxide. Dicumyl peroxide is typically used at 0.5–1.0 phr to provide crosslinking; its decomposition kinetics require early barrel temperatures below 130 °C to prevent premature cure before the mixing section. In foam extrusion, the die is often cooled to 110–120 °C while the melt is maintained at 170–190 °C upstream, and die pressure is kept above the gas solubility threshold for the specific blowing agent loading. Field experience on foam lines indicates that cell-size uniformity is more sensitive to die-pressure fluctuation than to small changes in blowing agent concentration. Strong basic additives should be avoided in peroxide-cured formulations because they can interfere with cure rate and color stability.
Comparison with other commercial ethylene-vinyl acetate grades clarifies the position of HANWHA EVA 1828. The following table summarizes typical property envelopes for 18 wt% VA EVA, a lower-VA class, and a higher-VA class; the ranges represent general published class data, and lot-specific certificates of analysis should be consulted for production decisions.
| Parameter | Test method | HANWHA EVA 1828 | Lower-VA class | Higher-VA class |
|---|---|---|---|---|
| Vinyl acetate content | FTIR or internal method | 18 wt% | 14–16 wt% | 26–29 wt% |
| Melt flow index | ASTM D1238-20 | 2.8 g/10 min | 1.5–3.5 g/10 min | 1.8–3.2 g/10 min |
| Density | ASTM D1505-18 | 0.940 g/cm³ | 0.932–0.938 g/cm³ | 0.948–0.955 g/cm³ |
| Melting range | ASTM D3418-15 | 82–86 °C | 89–95 °C | 70–75 °C |
| Hardness | ASTM D2240-15 | Shore A 90 | Shore A 95 | Shore A 75–80 |
Compared with lower-VA EVA, the 18 wt% grade accepts higher polar filler loadings and develops higher peel strength on aluminium foil under ASTM F88. Compared with higher-VA copolymers, EVA 1828 retains lower surface tack and higher dimensional stability, which is advantageous in pellet handling and storage. Metallocene ethylene-octene plastomers can provide higher dart impact at equal density under ASTM D1709, but they do not match the polar adhesion mechanism associated with vinyl acetate carbonyl dipoles.
In polyolefin blend design, EVA 1828 is used as a toughness modifier for LLDPE and as a compatibilizer for polar additives in polyethylene film. When blended at 15–30 wt% into LLDPE, the vinyl acetate groups reduce crystallinity and lower the dynamic storage modulus measured by ASTM D5023; the resulting film exhibits lower seal-initiation temperature and improved cling in stretch-wrap formulations. The carbonyl absorbance of vinyl acetate allows copolymer distribution in a blend to be mapped by infrared microscopy, which is useful for detecting nonuniform dispersion in cast-film samples. Mixing studies on production-scale co-rotating extruders show that melt-temperature uniformity of ±3 °C across the barrel is required to avoid localized high-VA domains that cause optical haze and inconsistent adhesion. Use of EVA 1828 in incompatible polypropylene systems is limited; phase separation and low interfacial adhesion occur unless a maleic anhydride-grafted polyolefin coupling agent is added at 2–5 wt%. In thermoplastic elastomer compounds, the grade can be diluted with paraffinic or naphthenic oil, but oil absorption is lower than in high-VA grades because of the smaller amorphous fraction.
In cast-film lamination and extrusion coating, EVA 1828 is selected when lower seal-initiation temperature or improved adhesion to aluminium foil, polyester, or paperboard is required. The melt index 2.8 g/10 min supports draw rates typical of low-density polyethylene coating lines; however, neck-in is generally greater than LDPE because the comonomer lowers zero-shear viscosity and increases shear-thinning. Adhesion to aluminium foil increases with vinyl acetate content in the 9–28 wt% range, but the benefit approaches a plateau when cohesive failure of the copolymer becomes the limiting peel mechanism. For retort or hot-fill laminate structures, the 82–86 °C melting range restricts sustained service temperatures: bond creep under load at 80 °C is a known limitation. Food-contact applications require verification under 21 CFR 177.1350 and EU 10/2011 for the specific film construction and migration test conditions; the presence of vinyl acetate comonomer alters overall migration calculations compared with polyethylene homopolymers.
For regulatory review, HANWHA EVA 1828 is subject to the same EU and US polymer controls as ethylene-vinyl acetate copolymers. Verification under REACH 1907/2006 requires the downstream user to confirm substance registration and, where applicable, substances of very high concern screening. The product is not a finished article; compliance with RoHS 2011/65/EU must be evaluated on the final component because lead, cadmium, mercury, and hexavalent chromium limits are defined at the homogeneous material level by RoHS 2011/65/EU Annex II. When used in toys, the relevant migration limits of EN 71-3 apply to the finished article, not to the raw resin. Handling should limit dust generation during unloading, and pellets should be stored in closed containers away from strong oxidizing agents. The main decomposition product during thermal processing is acetic acid; adequate local exhaust ventilation is required for extruder die areas.
In injection molding and profile extrusion, the processing window of EVA 1828 is established by its melting range and thermal stability limits. Barrel profiles are commonly set from 150 °C at the feed throat to 190 °C at the nozzle, with screw back pressure kept moderate to avoid excessive shear heating. Molds are cooled to 20–30 °C to reduce sticking; ejection can become difficult when mold temperature exceeds 40 °C. Profile extrusion lines use chilled-water calibration at 10–20 °C to stabilize dimensions because the low crystallinity of EVA 1828 reduces solidification modulus compared with rigid PVC or polyethylene. Batch-to-batch variability in melt flow index within the product specification may require minor screw-speed adjustment on tight-thickness profiles. Published data for this specific configuration is limited; therefore, pre-production trials on the target extruder and downstream calibrator are required to establish dimensional tolerances.
