| HS Code | 965264 |
| Product | HANWHA EVA 1317 |
| Vinyl Acetate Content | 17 wt% |
| Density | 0.937 g/cm³ |
| Melt Flow Index | 1.7 g/10min (190°C/2.16kg) |
| Melting Point | 80°C |
| Vicat Softening Point | 64°C |
| Tensile Strength At Break | 22 MPa |
| Elongation At Break | 760% |
| Hardness Shore A | 92 |
| Hardness Shore D | 40 |
| Brittleness Temperature | -75°C |
| Glass Transition Temperature | -30°C |
As an accredited HANWHA EVA 1317 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1317 is supplied as solid pellets in 25 kg multi-wall paper bags, typically 20 bags per pallet. |
| Container Loading (20′ FCL) | 20' FCL: HANWHA EVA 1317 (ethylene vinyl acetate copolymer) loaded as 25kg bags on pallets, containerized. |
| Shipping | HANWHA EVA 1317 is a non-hazardous ethylene-vinyl acetate copolymer resin shipped as solid pellets. It is typically transported in multi-wall paper bags or jumbo FIBCs, in ventilated, dry containers. Protect from moisture, direct sunlight, and excessive heat. No special hazardous cargo restrictions apply, but keep away from ignition sources during handling. |
| Storage | Store HANWHA EVA 1317 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep the original packaging sealed and intact to prevent moisture absorption and contamination. Avoid stacking excessively high to maintain pellet integrity. No special temperature control is required, but moderate ambient conditions are recommended. |
| Shelf Life | Shelf life is typically 2 years when stored in original packaging, away from heat, moisture, and direct sunlight. |
Compounding of a chemically blown crosslinked closed-cell foam from HANWHA EVA 1317 begins with pellet pre-blending in a low-shear tumble mixer. Published technical data for this grade list a vinyl acetate content of 18 wt% under ASTM D5594 and a melt mass-flow rate of 1.7 g/10 min at 190°C/2.16 kg under ASTM D1238, placing the material in the high-viscosity branch of EVA foam resins. On production two-roll mills with roll surface temperatures maintained at 105–115°C, the first processing boundary is scorch: dicumyl peroxide with a 1-minute half-life near 171°C must be added only after fillers and blowing agent are dispersed, and compound temperature must not exceed 110°C for more than 8 min before peroxide addition. A typical industrial preform uses EVA 1317 at 100 phr, azodicarbonamide at 4.0–8.0 phr, dicumyl peroxide at 0.4–1.0 phr, zinc oxide at 1.0–3.0 phr, stearic acid at 0.5–1.0 phr, and calcium carbonate at 10–40 phr; the zinc oxide and stearic acid combination functions as a blowing-agent activator and processing lubricant rather than as an inert filler package. Calendered preforms are compression-moulded at 150–170°C under 10–15 MPa platen pressure for 10–20 min depending on thickness. Foam density is typically reduced to 0.10–0.20 g/cm³, while hardness measured on the formed skin under ASTM D2240 type D remains in the 35–45 range before any post-treatment. The dominant failure mode on automated lines is split-cell tear when the gas-expansion rate outpaces crosslink modulus build-up; this is controlled by staging the ram pressure downward with a bleed cycle before the crosslink plateau. Batch-to-batch variance in calcium carbonate particle size distribution shifts the apparent cure torque measured on a rotorless curemeter under ASTM D5289; when median particle size moves above 3 µm, the formulation usually requires a 0.1 phr dicumyl peroxide upward adjustment to maintain cell-wall strength. Thermal degradation above 220°C releases acetic acid and must be avoided because the acid accelerates mould corrosion and causes surface tack on the expanded sheet.
| Component | Control range | Function | Process deviation threshold |
|---|---|---|---|
| EVA 1317 | 100 phr | Base resin | Compound temperature above 220°C causes acetic acid release |
| Azodicarbonamide | 4.0–8.0 phr | Chemical blowing agent | Above 8.0 phr surface blowholes appear on 10 mm sheet |
| Dicumyl peroxide | 0.4–1.0 phr | Crosslinking initiator | Mix temperature above 115°C causes scorch |
| Zinc oxide | 1.0–3.0 phr | Blowing-agent activator | Above 3.0 phr raises compound viscosity and cure torque |
| Stearic acid | 0.5–1.0 phr | Processing lubricant | Above 1.0 phr reduces mould release consistency |
| Calcium carbonate | 10–40 phr | Nucleating filler | Median particle size above 3 µm shifts cell uniformity |
Direct injection moulding of compact footwear unit soles from EVA 1317 is selected where flex-fatigue resistance and abrasion service are more critical than expanded-foam cushioning. The melt mass-flow rate of 1.7 g/10 min produces high injection-pressure demand; reciprocating-screw machines with 20:1 L/D barrels and check-ring shutoff are preferred over general-purpose machines. Barrel zone set points are typically profiled from 170°C at the feed throat to 190–200°C at the nozzle, while the mould wall is held at 25–40°C to balance flow length against post-demoulding shrinkage. Injection pressure at the screw tip commonly settles in the 80–120 MPa band for thick-wall soles, and clamp force is calculated from projected area rather than part volume. Short-shot adjustment is performed by increasing injection speed before raising melt temperature because exposure above 210°C promotes acetic acid evolution from the vinyl acetate segments; the acid deposits on mould vents and causes gas-burn marking at the flow front. The compact formulation typically blends EVA 1317 with 5–20 phr of high-pressure LDPE or EPDM to keep flexural modulus below 80 MPa and to improve gate blush resistance. Dimensional stability is assessed by measuring post-mould shrinkage after 48 h at 23°C/50% RH; values above 1.5% in the flow direction normally indicate insufficient packing pressure or premature gate freeze. Tear strength under ASTM D624 Type C is the governing lab test for outsole flex grooves; compounds intended for athletic unit soles are typically rejected when tear strength falls below the brand specification because groove-initiated tear propagates within 5,000 flex cycles. Pre-drying at 60°C for 2–4 h is applied only when pellet surface moisture exceeds 0.10% or when condensation is observed after cold-weather storage, since EVA 1317 is not hygroscopic enough to justify automatic desiccant drying on every cycle.
Dense, non-foamed EVA profiles based on EVA 1317 are processed on single-screw extruders with 24:1 L/D and a 3:1 compression-ratio screw, frequently with a grooved feed throat and a 40/60/40 mesh screen pack. The moisture boundary is operational rather than intrinsic: surface condensation from cold pellet storage causes pitting and die-swell irregularity, while the 18 wt% vinyl acetate content does not create hygroscopic viscosity shifts. When pellets are moved from storage below 10°C into a warm compounding hall, a hopper dryer at 60°C for 2 h removes surface film. Moisture levels above 0.15% measured by coulometric Karl Fischer titration produce surface splay and irregular die swell; drying is stopped below 0.05%. For dense profiles the compound often includes 20–40 phr calcium carbonate or talc, but talc above 30 phr lowers tear strength and increases die lip plate-out. EVA 1317 is not a direct substitute for EPDM in exterior automotive glazing profiles unless UV absorber and hindered-amine light stabiliser packages are loaded above the typical 0.3–0.5 wt% and validated under ISO 4892-2 to at least 1,000 h. The acetic acid released by thermal degradation above 220°C corrodes unplated steel calibrators; vacuum calibration tanks downstream should therefore be constructed from stainless steel or nickel-plated brass. Hardness and compression set are measured under ISO 868 and ISO 815-1; dense gasket compounds are typically formulated to 60–70 Shore A because lower hardness causes installation buckling and higher hardness reduces conformability at low-closure-force joint designs.
Blending EVA 1317 into LLDPE and LDPE film structures is performed on co-rotating twin-screw extruders with 40:1 L/D, not on single-screw dry-side equipment, because the 18 wt% vinyl acetate domains must be dispersed below 1 µm to improve dart impact without unacceptable haze. In LLDPE film, addition of 5–15 wt% EVA 1317 raises environmental stress-crack resistance as measured by ASTM D1693 Condition B; the improvement is attributed to the elastomeric amorphous phase and to reduced crystalline tie-chain stress. Specific haze values depend on LLDPE comonomer type and film gauge, and published data for this exact formulation is limited, so pilot-film trials on a cast-film line at melt temperatures below 200°C are recommended. In post-consumer mixed polyolefin streams, EVA 1317 at 5–10 wt% acts as an interfacial impact modifier rather than a true compatibiliser; notched Izod under ISO 180/A can recover to a level governed by the HDPE-to-PP ratio and stream contamination, but published data for this specific EVA 1317 recycle configuration is limited. Above 15 wt% addition, tensile modulus declines and die-face build-up appears on strand pelletizers. Gel count is checked under ASTM D3351 because EVA oxidation generates crosslinked gel particles above 210°C. This grade is not suitable for low-viscosity hot-melt adhesive systems; its melt viscosity at 180°C is too high for tank-applied packaging adhesives, and higher-melt-index EVA grades are specified for that application.
EVA 1317 is used as a pigment carrier where high filler wetting and low processing dilution are required, especially for polyolefin-based masterbatch compounded on co-rotating twin-screw extruders at 40–60% pigment loading. The 18 wt% vinyl acetate content reduces melt surface tension and improves pigment agglomerate wetting compared with LDPE carriers; the 1.7 g/10 min melt flow rate increases torque and melt pressure, so screw designs with distributive mixing elements and oil heating are preferred over flying-wing rotor geometries. Compounding temperatures are held between 170°C and 190°C; higher temperatures initiate acetic acid release, which attacks carbon black dispersion and lowers pH-sensitive pigment chroma. For carbon black masterbatches, loading of 45–50 wt% is attainable on 40:1 L/D twin-screw lines, but pressure drop across the die plate can exceed 12 MPa when screen packs are below 40 mesh. The finished masterbatch is characterized by filter pressure value under EN 13900-5 and dispersion under ISO 18553; masterbatch producers typically require an FPV below 0.2 bar/g and a dispersion rating of B or better. The limitation is carrier rheology: a carrier with melt flow rate below 2 g/10 min dilutes slowly in thin-wall film-grade LLDPE, so EVA 1317 should not be used for masterbatches destined for films below 30 µm unless a lower-molecular-weight co-carrier is added.
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Ethylene-vinyl acetate copolymer grade HANWHA EVA 1317 is supplied as a low-density thermoplastic resin produced by high-pressure polymerisation. The nominal vinyl acetate comonomer content is 18% by mass, which places the grade between low-vinyl-acetate polyethylene modifiers and higher-vinyl-acetate elastomeric copolymers. The acetate groups disrupt polyethylene crystallinity, broadening the melting range, reducing ambient-temperature modulus, and improving flexural fatigue resistance, filler wetting, and adhesion to polar substrates when compared with branched low-density polyethylene homopolymers. The product remains thermoplastic and is processed on conventional melt-phase equipment without required vulcanisation.
| Property | Nominal value | Test method |
|---|---|---|
| Vinyl acetate comonomer content | 18% by mass | Internal Fourier transform infrared spectroscopy calibrated to ASTM D5594-18 where lot-specific data are supplied |
| Melt mass-flow rate | 1.8 g/10 min at 190 °C and 2.16 kg | ISO 1133-1:2022 or ASTM D1238-20 |
| Density at 23 °C | 0.940 g/cm³ | ISO 1183-1:2019 or ASTM D792-20 |
The table values are representative lot-average data and are not specification limits. For regulated applications, the certificate of analysis for the specific production lot should be used because pellet sampling, storage history, and reactor residence-time distribution can shift melt mass-flow rate and residual vinyl acetate monomer. Unfoamed injection-moulded plaques with 2 mm thickness commonly exhibit tensile strength at break in the range of 14–18 MPa and elongation at break above 650% when tested according to ISO 527-2:2012 at 23 °C; these values are characteristic of the 18% vinyl acetate class and should be verified on production specimens rather than treated as lot-release limits.
The melt mass-flow rate of 1.8 g/10 min corresponds to a medium-flow ethylene-vinyl acetate. At injection-moulding shear rates, the copolymer exhibits pseudoplastic flow, with apparent viscosity falling as shear rate increases. Shot-to-shot consistency is controlled by nozzle temperature uniformity, holding pressure decay, and gate freeze-off time. Barrel temperatures for ungassed EVA of similar vinyl acetate content are commonly maintained from 170 °C to 210 °C, with the nozzle held below 220 °C. Residence above 230 °C accelerates acetic acid elimination from vinyl acetate units, producing acidic odour, surface splay, and corrosion risk on copper-alloy tool components. A general-purpose polyolefin screw with L/D 20:1 or higher is suitable, and screw speed should be trimmed to limit viscous heating when the mould contains long flow paths or high levels of fine nucleating filler.
Mould shrinkage is not a fixed material constant for EVA 1317 and should be determined for each tool geometry. Measurement using ISO 294-4:2018 on a standard plaque accounts for cavity pressure, wall thickness, mould temperature, and gate location. Crystallisation is retarded by the vinyl acetate units, so thick sections may require extended hold time or fixturing until the part cools below 70 °C and stabilises dimensionally.
Compounding operations that expand EVA 1317 with chemical blowing agents require alignment of blowing-agent decomposition kinetics with the melt rheology of the copolymer. Activated azodicarbonamide grades with decomposition onset near 200–215 °C are commonly dispersed into the melt because the exotherm overlaps the upper end of the EVA processing range. In a co-rotating twin-screw extruder with L/D 40:1, polymer pellets are introduced at the feed throat while heat-sensitive blowing agents are metered downstream through a side feeder to limit pre-decomposition. Barrel temperatures are profiled from 150 °C at the feed throat to 185 °C at the die, and screw speed is adjusted to avoid excessive specific mechanical energy input. Premature gas evolution inside the extruder produces melt-pressure instability at the die plate and creates non-uniform cell structure. Vented configurations under low vacuum are used when surface moisture or low-temperature decomposition by-products must be removed. Expanded sheet or profile should be cooled immediately after the die to fix cell morphology; slow cooling permits cell coalescence, surface wrinkling, and loss of dimensional control.
Crosslinked foam expansion with dicumyl peroxide imposes a narrower thermal pathway. The peroxide half-life must be evaluated against the viscosity trajectory of the melt. Heating too rapidly through the 130–160 °C zone can produce surface scorch, while delayed crosslinking above 180 °C permits cell collapse before gelation. The effective processing window for simultaneous crosslinking and expansion in compression-moulded EVA foam is frequently narrower than ±5 °C for a fixed formulation. Clamp tonnage, platen temperature uniformity, and gas counterpressure control escape of blowing-gas before the crosslinked network reaches sufficient melt strength. Zinc stearate and an activator system matched to the peroxide half-life are commonly used to improve mould release and cell uniformity.
Filled formulations based on EVA 1317 frequently incorporate calcium carbonate, silica, talc, or carbon black to raise hardness, modify nucleation density, or reduce compound cost. The 18% vinyl acetate content improves wetting of polar filler surfaces relative to ethylene homopolymers because the acetate dipole interacts with surface hydroxyls. However, filler loadings above 40 phr can sharply increase melt viscosity and screw torque. On a co-rotating twin-screw extruder with L/D 40:1, side-fed filler should be introduced only after a fully molten polymer seal has formed; otherwise unmelted pellets and filler segregate along the screw channel and produce hard spots in the extrudate.
Melt filtration through screen packs rated at 40–80 mesh removes agglomerates, but frequent screen changes may be required when filler moisture exceeds 0.5% by mass. Hydrated filler surfaces release steam, generating pinholes and surface roughness in foamed profiles. During high-shear dispersion, compound melt temperature should not exceed 220 °C because acetic acid formation accelerates and can attack steel surfaces. Batch-to-batch shifts in filler particle size can alter nucleation density without machine-setting changes. When filler top-size moves from 5 µm to 15 µm, cell size distribution may widen and surface roughness may increase in chemically foamed sections. Incoming fillers are therefore checked by dry-sieve analysis using ASTM D1921 or an equivalent method, and compound apparent density is measured using ASTM D1895 before release to expansion operations.
Substitution of EVA 1317 for a lower-vinyl-acetate grade in an existing compression-moulded foam formulation requires adjustment of blowing-agent loading, cure time, and mould temperature. Because vinyl acetate content is 18% rather than 15% or lower, the crystalline melting point and storage modulus at ambient temperature are reduced. Moulded foam hardness is therefore lower, and elongation at break increases. The higher amorphous fraction also increases solubility and diffusion of blowing-agent gases. This can generate finer cell structure, but it can also increase shrinkage if the crosslinked network is not sufficiently developed before demoulding. Cure time may need to be extended by 10–20% relative to a lower-vinyl-acetate control, and the mould opening sequence should be staged to prevent rapid gas expansion from tearing the part surface.
The difference also appears in adhesion and printing. Higher vinyl acetate content in EVA 1317 raises surface polarity, which improves adhesion of polyurethane adhesives and solvent-based inks used on footwear midsoles. Compared with higher-vinyl-acetate grades in the same series, EVA 1317 retains higher elevated-temperature dimensional stability and lower blocking tendency during storage in warm warehouses. Grade selection therefore balances lower hardness and improved filler wetting against resistance to softening at elevated service temperatures.
For release-to-production acceptance, EVA 1317 is evaluated against the manufacturer’s certificate of analysis for melt mass-flow rate, density, and vinyl acetate content. Packaging may include bulk railcar, octabin, or 25 kg bags. Storage below 50 °C away from direct ultraviolet exposure limits oxidative degradation and blocking. In the European Union, compliance with REACH and RoHS 2011/65/EU should be confirmed through the supplier’s safety data sheet and compliance declaration for the specific consignment. Food-contact status is not assumed unless a grade-specific statement is issued under FDA 21 CFR 177.1520 or an equivalent national regulation. Published data for specific food-contact configurations is limited, and end users are responsible for migration testing under the intended temperature and food simulant conditions. Processors operating at high ambient humidity should confirm pellet surface moisture before melt processing. Although EVA is not strongly hygroscopic, surface condensation on cold pellets entering a warm feed throat can create surface defects in extruded sheet. Predrying at 60–70 °C for 2–4 h may be employed only when moisture-related surface defects are observed; otherwise drying is not required and may increase energy consumption without improving melt quality.
