| HS Code | 194396 |
| Product Name | HANWHA EVA 1334 |
| Resin Type | Ethylene Vinyl Acetate (EVA) Copolymer |
| Vinyl Acetate Content | 33% |
| Melt Flow Rate | 4.0 g/10 min (190°C, 2.16 kg) |
| Density | 0.96 g/cm³ |
| Melting Point | 65°C |
| Vicat Softening Point | 58°C |
| Tensile Strength | 22 MPa |
| Elongation At Break | 850% |
| Hardness | 72 Shore A |
| Glass Transition Temperature | -40°C |
| Refractive Index | 1.48 |
| Light Transmittance | 90% |
As an accredited HANWHA EVA 1334 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1334 is supplied as 25 kg bags of polymer pellets, packaged in moisture-resistant, polyethylene-lined woven bags for safe handling. |
| Container Loading (20′ FCL) | Hanwha EVA 1334 resin loaded in 20′ FCL, palletized bags, secured, kept dry, ventilated, protected from damage. |
| Shipping | HANWHA EVA 1334 is an ethylene vinyl acetate copolymer resin supplied as solid pellets. It is non-hazardous for transport and not regulated as dangerous goods. Ship in clean, dry containers or hopper trucks, protected from moisture, heat, and direct sunlight to prevent clumping or degradation. |
| Storage | Store HANWHA EVA 1334 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep in original sealed packaging to prevent moisture absorption and contamination. Avoid storage above 50°C; maintain moderate humidity. Keep separate from oxidizing agents. No special storage restrictions apply, but maintain good housekeeping to minimize dust accumulation. |
| Shelf Life | Store unopened in a cool, dry place. Shelf life is typically 24 months from the date of manufacture. |
HANWHA EVA 1334 is specified with a nominal vinyl acetate content of 33 wt% and a melt flow index of 4.0 g/10 min under ISO 1133-1:2022 at 190 °C, 2.16 kg. Industrial conversion is concentrated in high-VA, low-MFI applications where cohesive strength, filler wetting, seal initiation temperature, or bituminous compatibility require controlled flow behaviour. The downstream scenarios below are separated by equipment configuration, formulation boundaries, and terminal product testing requirements.
Case and carton sealing operations run EVA 1334-based hot melts through heated gear pumps and slot dies. The 33 wt% vinyl acetate content depresses the melting temperature sufficiently for application at 160–180 °C, while the 4.0 g/10 min melt flow index produces the high melt viscosity required for defined bead placement on recycled corrugated board. Low-temperature performance is assessed by conditioning folding carton stock at -10 °C for 24 h and checking for fibre tear under ASTM D1876 T-peel. Formulations with wax above 30 wt% become brittle at this condition and fail by adhesive delamination. Slot-die lip gaps are typically 0.3–0.5 mm, with pump speeds adjusted to deliver 80–150 g/m². High-speed lines above 60 m/min require antioxidant stabilization above 0.5 wt% to limit char formation in the die manifold. The adhesive is supplied as granules or pillows and must be protected from humidity above 60% RH because moisture ingress causes bubble formation at the die lip.
| Component | Range | Function |
|---|---|---|
| EVA 1334 | 30–35 wt% | Elastic recovery, adhesion to kraft |
| Hydrocarbon tackifier | 25–35 wt% | Tack development, open time |
| Paraffin or microcrystalline wax | 20–30 wt% | Viscosity control, set time |
| Hindered phenolic antioxidant | 0.5–1.0 wt% | Thermal-oxidative stability |
Production-scale failure modes in this segment are dominated by char accumulation in the die manifold after prolonged dwell above 180 °C for more than 24 h and by viscosity drift caused by wax evaporation. Heated hose temperatures are held within ±5 °C of the die setpoint to avoid stringing at the nozzle closing point. Published data for this specific EVA 1334 formulation on ultra-high-speed lines above 120 m/min is limited; pilot runs should establish the exact viscosity-stability curve under production-specific dwell time.
In cast or blown coextrusion of flexible packaging, EVA 1334 is placed as the sealant skin at 15–40 µm thickness on a polyethylene core. Heat-seal initiation is typically 10–20 °C lower than comparable LDPE sealants, with jaw temperatures of 85–105 °C producing lap-seal strengths above 8 N/15 mm under ASTM F88. Extruder melt temperature is controlled at 190–210 °C; excursions beyond 230 °C initiate acetic acid elimination and cause film gels. The chill roll is kept at 15–25 °C, and the sealant layer is corona-treated only when lamination requires it, since surface oxidation can shift seal initiation upward. Terminal products include flow-wrap snack packaging, lidding film, and medical pouch sealants. Food-contact status requires a formulation-specific review under FDA 21 CFR 177.1350 and EU Regulation (EU) No 10/2011; the base copolymer does not automatically confer migration compliance if slip agents or process stabilizers exceed their specific migration limits. For aseptic filling, seal resistance after hydrogen peroxide vapour contact at 50–60 °C for 30 min must be re-qualified, because surface oxidation can reduce seal strength by 5–15% under ASTM F88.
Halogen-free flame-retardant sheathing compounds use EVA 1334 as the polymer matrix because 33 wt% vinyl acetate creates polar sites for adhesion to aluminium hydroxide or magnesium hydroxide surfaces. Compound formulations typically contain 20–30 wt% EVA 1334, 55–65 wt% aluminium hydroxide, 1–3 wt% processing aid, 0.5–1.5 wt% organosilane, 0.5–1.0 wt% hindered phenolic antioxidant, and 1–3 wt% carbon black. The limiting factor is melt viscosity: at filler loadings above 65 wt%, torque on a co-rotating twin-screw extruder with L/D 44:1 rises sharply, and melt filtration through 120 µm screens becomes unstable. Barrel temperatures are segmented from 120 °C in the feed zone to 160 °C at the die, with screw speeds of 200–400 rpm. Final sheathing is applied on a single-screw extruder with a compression ratio of 2.5:1 to 3.0:1 and die temperatures of 130–160 °C. Compounds must be pre-dried at 60–70 °C for 4 h when storage humidity exceeds 60% RH.
| Property | Test method | Typical requirement |
|---|---|---|
| Vertical flame spread | IEC 60332-1-2 | Char height ≤ 425 mm |
| Gas acidity | IEC 60754-2 | pH ≥ 4.3, conductivity ≤ 10 µS/mm |
| Tensile elongation retention after ageing | IEC 60811-501 | ≥ 75% after 168 h at 100 °C |
Mechanical and combustion performance is verified under the standards above. Published data for this specific EVA 1334 configuration in multi-core sheathing is limited; therefore, pilot-scale runs should establish the exact filler-viscosity curve before production commitment. The terminal product is cable sheathing for public building installations, underground railway systems, and control panels where halogen acid emission is restricted.
EVA 1334 is introduced into oxidized bitumen at 5–12 wt% in a heated high-shear mixer at 160–190 °C. The 33 wt% vinyl acetate content improves polar interaction with asphaltenes, reducing polymer separation during storage at 150 °C compared with lower-VA EVA grades. The blend is processed with an addition sequence that delays EVA addition until bitumen temperature has stabilized at 170 °C; polymer pellets are added over 20–30 min under constant agitation. Needle penetration at 25 °C under EN 1426 decreases, while softening point under EN 1427 increases into the 120–140 °C range for torch-applied membranes. Cold bending performance under EN 1109 establishes the lower service temperature of the finished membrane. Terminal products include reinforced waterproofing membranes for roofs and below-grade structures. A process boundary is the viscosity ceiling in hot-melt tanks: at EVA addition above 12 wt%, mixing torque increases and pump cavitation may occur unless temperature is raised above 190 °C, which accelerates bitumen oxidation.
For additive and pigment masterbatches, EVA 1334 is melt-mixed at 120–140 °C in a co-rotating twin-screw extruder with L/D 40:1; the 33 wt% VA content assists pigment wetting, and the 4.0 g/10 min MFI limits pellet dusting during strand pelletization. Regulatory status is formulation-dependent under REACH and RoHS, and cannot be assigned solely from the base polymer.
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Within the Hanwha ethylene-vinyl acetate copolymer slate, the grade designation EVA 1334 identifies a high-pressure free-radical copolymer containing a nominal 13.0 wt% vinyl acetate comonomer and a melt flow rate of 3.4 g/10 min measured at 190 °C under 2.16 kg load according to ASTM D1238-20. Density is typically reported as 0.928 g/cm³ under ASTM D1505-18. The 13.0 wt% acetate content disrupts polyethylene crystallinity and increases segmental polarity, while the mid-range melt flow rate positions the material between high-viscosity EVA 1314 and higher-flow EVA 1344 within the same comonomer family. This viscosity window is commercially specified for thin-wall injection molding, profile extrusion, flexible sealant layers, and chemically foamed sheet where melt pressure, blowing-agent decomposition, and cell stabilization must be controlled simultaneously.
Representative specification data for EVA 1334 are consolidated below. Vinyl acetate content is determined by Fourier transform infrared spectroscopy using ASTM D5594-18. Melt flow rate is cross-checked under ISO 1133-1:2022, procedure A, at 190 °C and 2.16 kg. Density values derived from ASTM D1505-18 are lot central values rather than minimum or maximum limits. Batch-to-batch variation in high-pressure free-radical copolymerization is normally controlled within ±0.3 wt% vinyl acetate and ±0.15 g/10 min melt flow rate on production-scale lines; converters should confirm the certificate of analysis before setting screw speeds, barrel profiles, or die gaps.
| Property | Typical value | Test method |
|---|---|---|
| Vinyl acetate content | 13.0 wt% | ASTM D5594-18 |
| Melt flow rate | 3.4 g/10 min | ASTM D1238-20 / ISO 1133-1:2022 |
| Density | 0.928 g/cm³ | ASTM D1505-18 |
Thermal processing of EVA 1334 is governed by the susceptibility of acetate side groups to elimination at elevated temperature. On single-screw extruders with 24:1 to 30:1 L/D ratios and compression ratios between 2.5:1 and 3.5:1, the melt temperature is normally maintained between 120 °C and 180 °C. Residence time above 200 °C should be minimized, and extended exposure above 220 °C produces acetic acid, gel specks, yellowing, and die-lip plate-out. Production-scale extrusion lines running EVA 1334 at high back pressure have exhibited pressure surging and carbonized deposits on unplated tool steel when melt-temperature probes fail and the barrel overrides the set point. The recommended metallurgy includes nitrided barrel walls, chrome-plated screw surfaces, and stainless steel adapters and dies. Pre-drying is required when ambient relative humidity exceeds 60%; a desiccant hopper dryer at 60–70 °C for 4 h with a supply dew point of −20 °C or lower is sufficient to hold moisture below 0.05%.
When EVA 1334 is used as the base resin in chemically blown foam sheet, the 3.4 g/10 min melt flow rate directly influences the expansion window because gas must nucleate and grow against a viscoelastic melt envelope. Compounding is typically conducted on a co-rotating twin-screw extruder with 40:1 L/D using a barrel profile from 110 °C to 130 °C to disperse azodicarbonamide at 0.5–2.5 phr, dicumyl peroxide at 0.4–1.0 phr, zinc oxide at 0.5–1.5 phr, and zinc stearate at 0.2–0.5 phr without premature decomposition. The compounded melt is then fed to a 24:1 single-screw sheet extruder and calender before entering a hot-air expansion oven at 190–210 °C. The effective processing window for the expansion stage is approximately ±5 °C; temperatures below 185 °C produce high-density, under-expanded sheet, while temperatures above 215 °C cause cell coalescence, surface collapse, and acetic acid release. In foam production, EVA 1334 offers higher melt fluidity than EVA 1314, improving gauge uniformity in sheet below 8 mm, but its lower elongational viscosity may limit thick-section expansion above 15 mm unless crosslink density is increased through peroxide or multifunctional coagent addition.
Injection-compression and direct injection molding of crosslinked EVA midsoles on machines with clamp force from 150 t to 350 t has shown that EVA 1334 reduces peak cavity pressure relative to EVA 1314 in high-flow tools with long rib structures and thin sidewalls. The lower melt viscosity of EVA 1334 improves fill in complex sole geometry, but published data for this specific configuration is limited because cavity pressure depends on gate dimensions, mold temperature, and peroxide cure acceleration. At equivalent azodicarbonamide and dicumyl peroxide addition, EVA 1314 typically yields more stable thick-section foam expansion due to higher melt strength, whereas EVA 1334 permits shorter injection fill time and lower barrel torque. When EVA 1534 is considered, the 15 wt% vinyl acetate grade produces lower Shore hardness and greater chain segmental mobility, while EVA 1334 retains slightly higher crystallinity and better dimensional stability at elevated insole service temperatures. Hardness and compression set are evaluated under ASTM D2240-21 and ASTM D395-18, respectively.
In extrusion lamination and cast-film sealant layers, the 13 wt% vinyl acetate content of EVA 1334 creates moderate polar adhesion to aluminum foil, polyester, and oriented polypropylene without the higher blocking tendency and lower thermal oxidation resistance of 18 wt% vinyl acetate grades such as EVA 1834. Heat seal strength is characterized under ASTM F88/F88M-15, and hot-tack is mapped on gradient seal testers using ASTM F1921-18. EVA 1334 can be processed on cast-film lines at melt temperatures from 160 °C to 190 °C with chill-roll temperatures between 15 °C and 25 °C. High line speeds reduce melt curtain stability and increase neck-in; for film below 30 µm, edge pinning or vacuum box adjustment is required when throughput rises above the die gap limit. In comparison with EVA 1534, the lower acetate content of EVA 1334 shifts the seal initiation temperature upward and narrows the hot-tack plateau, but improves coefficient of friction and reduces roll blocking during storage.
Compounds based on EVA 1334 are stabilized with a hindered phenol primary antioxidant and an organophosphite secondary antioxidant in the range of 0.05–0.15 wt% combined loading. Acid scavengers such as zinc stearate are used to buffer carboxylic acid species, but excessive metal stearate above 0.5 wt% can increase die lip deposit formation. Thermal-oxidative stability is evaluated by oxidative induction time under ISO 11357-6:2018. The base resin falls within ethylene-vinyl acetate copolymers covered by FDA 21 CFR 177.1350 when used in accordance with the end-use extraction limits for food-contact applications. Converters are responsible for confirming that the antioxidant package, blowing agent, peroxide, and processing aids meet REACH (EC) No 1907/2006 and RoHS 2011/65/EU as amended. Storage should remain below 40 °C and below 60% relative humidity, with the original packaging sealed; after exposure to alternating humidity, EVA 1334 pellets should be re-dried before melting to prevent splay and surface defects.
A direct comparison of EVA 1334 with adjacent Hanwha EVA grades clarifies selection logic for extrusion and molding operations. The following differentiation table is based on nominal comonomer and melt flow rate designations and should be verified against current producer technical bulletins.
| Grade | Vinyl acetate content | Melt flow rate | Processing and application consequence |
|---|---|---|---|
| EVA 1314 | 13.0 wt% | 1.4 g/10 min | Higher melt strength for thick foam sheet and heavy-wall profiles; more viscous melt requires elevated screw torque and longer injection fill time. |
| EVA 1334 | 13.0 wt% | 3.4 g/10 min | Balanced flow for moderate cavity pressure, thin-wall molding, and cast film; retains sufficient melt strength for chemically foamed sheet below 15 mm. |
| EVA 1534 | 15.0 wt% | 3.4 g/10 min | Increased polarity and chain flexibility; lower Shore hardness and improved adhesion to polar substrates; lower crystalline stiffness and thermal resistance than EVA 1334. |
| EVA 1834 | 18.0 wt% | 3.4 g/10 min | High acetate content for sealant layers and high-adhesion wire and cable jackets; lower heat resistance and higher blocking tendency than EVA 1334. |
