| HS Code | 698943 |
| Product | HANWHA EVA 1125 |
| Type | Ethylene Vinyl Acetate Copolymer |
| Vinylacetatecontent | 11.5% |
| Meltflowrate | 2.5 g/10min |
| Density | 0.94 g/cm³ |
| Meltingpoint | 89 °C |
| Hardness | 45 Shore D |
| Tensilestrength | 17 MPa |
| Elongationatbreak | 700% |
| Vicatsofteningpoint | 68 °C |
| Brittlenesstemperature | -70 °C |
As an accredited HANWHA EVA 1125 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | HANWHA EVA 1125 is supplied in 25 kg sealed paper bags, ensuring safe handling and moisture protection. |
| Container Loading (20′ FCL) | Load 20’ FCL with HANWHA EVA 1125 resin pellets, using secured pallets, moisture protection, and proper ventilation for safe transport. |
| Shipping | HANWHA EVA 1125 is a non-hazardous ethylene-vinyl acetate copolymer resin. Ship in clean, dry containers or lined bags to prevent contamination. Avoid excessive heat and moisture during transit. No special dangerous-goods declaration required, but standard handling and ventilation practices apply. Store in a cool, dry area, protected from direct sunlight. |
| Storage | Store HANWHA EVA 1125 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly closed to prevent moisture absorption and contamination. Avoid stacking excessively to prevent deformation. Maintain moderate humidity and stable temperature. Follow local regulations and keep away from incompatible materials. |
| Shelf Life | Shelf life for HANWHA EVA 1125 is typically one year from production date when stored in a cool, dry, well-ventilated area. |
Hot melt adhesive compounding for high-speed carton sealing, tray forming and wrap-around case packaging represents one of the most technically demanding conversion routes for EVA 1125. The copolymer is specified with a nominal vinyl acetate content of 11 wt% and a melt flow index of 25 g/10 min under 190°C/2.16 kg load per ASTM D1238. In a jacketed sigma-blade mixer of 100–300 L working capacity, EVA 1125 is combined at 30–35 wt% with a C5/C9 aliphatic-aromatic hydrocarbon tackifier, a Fischer-Tropsch wax possessing a congealing point of 96–102°C, and a hindered phenolic antioxidant package at 0.5–1.0 wt%. Mixing is maintained at 150–165°C under a nitrogen blanket of 0.3–0.5 bar positive pressure. The molten adhesive is conveyed by a gear pump against backpressure of 0.8–1.2 MPa through heated hoses to a slot-die applicator. Brookfield viscosity at 180°C per ASTM D3236 normally remains between 800 and 1,500 mPa·s within this formulation window; values below 800 mPa·s cause adhesive bleed-through on clay-coated carton board, while values above 1,500 mPa·s reduce pump efficiency and increase stringing during nozzle shutdown.
Open time and set time are governed by wax crystallisation rate and not solely by melt index. On corrugated board lines running at 40–60 m/min, formulators target an open time of 3–5 s and a set time of 0.5–1.5 s; these values must be verified in plant trials because substrate moisture above 8% extends set time and weakens fibre-tearing bond strength. Processing above 190°C in open kettles is avoided because deacetylation releases acetic acid and accelerates mild steel corrosion; stainless steel 316 wetted parts are specified for extended run times. For food-contact packaging, application falls under FDA 21 CFR 175.105, requiring the base polymer and tackifier to be selected from substances permitted by the applicable paragraph and the adhesive to remain within a functional-barrier or no-detectable-migration condition in the intended use.
| Standard or regulation | Scope | Verification point in processing |
|---|---|---|
| FDA 21 CFR 175.105 | Indirect food-contact adhesives | Functional barrier or no detectable migration in food simulants |
| ASTM D1238-20 | Melt flow index of EVA 1125 | 190°C/2.16 kg |
| ASTM D3236 | Hot melt viscosity | Brookfield Thermosel at 180°C |
| ASTM E28 | Ring and ball softening point | Target window 85–95°C |
| ASTM D4498-07 | Hot melt heat stability | Viscosity change over 24 h at 180°C |
| ISO 1133-1:2022 | MFR confirmation | Equivalent conditions to ASTM D1238 |
| REACH SVHC | Candidate list content | <0.1 wt% in delivered compound |
| RoHS 2011/65/EU | Heavy metal and brominated flame retardant restrictions | Applicable to pigments and additives, not untreated EVA |
When EVA 1125 is added to paraffin wax at 2–5 wt% for corrugated curtain coating, the primary function is viscosity elevation and wax crystal modification rather than bond formation. The 11 wt% vinyl acetate content limits compatibility with fully refined paraffin; phase separation is minimised when mixing is held at 120–130°C for 20–30 min under low-shear agitation before the melt reaches the curtain head. At 2–5 wt% addition, melt viscosity at 120°C rises from roughly 6–10 mPa·s to 18–30 mPa·s, slowing penetration into the corrugating medium and increasing the surface wax film weight. Water-vapour transmission rate is then measured by TAPPI T 448 or ISO 2528; EVA-modified systems are selected when the specification must remain below 10 g/m²·24 h at 38°C/90% RH. Rub resistance is evaluated with a Sutherland rub tester under ASTM D5264; addition above 6 wt% EVA 1125 raises melt elasticity to a point where curtain breakup and edge bead instability are observed. Published data for this specific concentration window with EVA 1125 is limited; converter qualification with on-line film thickness gauges is therefore required.
On high-speed wood edge banding lines running at 20–40 m/min, EVA 1125 is compounded into filled hot melts for PVC, ABS and melamine edge bands. Calcium carbonate filler at 10–20 wt% lowers unit cost and shortens cooling time, but it raises Brookfield viscosity at 190°C by 15–30% relative to unfilled EVA 1125. The low vinyl acetate content supplies crystallinity that supports a ring-and-ball softening point of 85–95°C per ASTM E28, which is useful for heat resistance during cabinet assembly. Adhesion to highly plasticized PVC edge banding is lower than that of 18–28 wt% vinyl acetate hot melt grades; chlorinated polyolefin adhesion promoter at 5–10 wt% of the formulation is therefore necessary. The molten adhesive is applied through a heated slot nozzle at 2–3 bar feed pressure and compressed by a roller at 0.2–0.4 MPa roller force. Heat resistance is checked by static load at 60°C for 24 h or by DIN EN 14257; moisture resistance is evaluated after conditioning per DIN EN 204 using the D3 classification where intermittent indoor exposure is expected. Amine-based adhesion promoters are not combined with EVA 1125 in this application because residual amine accelerates deacetylation and increases odour at 180°C processing temperatures.
EVA 1125 is dissolved in a toluene/methyl ethyl ketone/ethyl acetate blend at a 50:30:20 volume ratio to yield a laminating base with 18–22 wt% solids. The solution viscosity at 25°C is typically 200–400 mPa·s when measured with a Brookfield viscometer at 20 rpm following an ASTM D1259-type procedure. This viscosity window permits gravure coating at 2–4 g/m² dry adhesive weight and line speeds of 150–250 m/min. The low vinyl acetate content reduces bond strength to aluminium foil and PVDC-coated films relative to EVA copolymers with 18–28 wt% vinyl acetate; for foil-to-low-density-polyethylene laminations, an organofunctional silane adhesion promoter at 1–2 wt% of solids is added. Lamination peel strength is measured by ASTM D903 or ISO 11339 after 24 h cure at 23°C/50% RH. Storage is maintained in closed stainless steel vessels; moisture ingress above 0.5 wt% causes phase separation of the low-VA polymer and visible haze in the finished laminate.
In drying tunnels, a first zone at 50°C and a second zone at 70°C are typical to avoid skinning at high solvent vapour concentration. Retained solvent above 5 mg/m² in the dry adhesive layer leads to odour and reduced bond strength; gas chromatography headspace analysis per ASTM D4526 or an equivalent plant method is used for verification.
Case-making lines for hardcover books and stationery binders require hot melt adhesives that resist creep under stack load at warehouse temperatures up to 40°C. EVA 1125 with 11 wt% vinyl acetate produces a higher crystalline fraction than flexible EVA grades containing 28 wt% VA, which reduces cold flow under load. The trade-off is lower adhesion to oriented polyester film covers; corona-pretreated polyester at 38–42 mN/m surface tension is required to reach acceptable fibre-tearing bonds. In a typical formulation, EVA 1125 is compounded at 30–34 wt% with a rosin ester tackifier of softening point 95–105°C, wax at 20–25 wt% and hindered phenolic antioxidant at 0.5 wt%. The adhesive is applied at 170–180°C by wheel or nozzle at a coating weight of 40–80 g/m². Creep resistance is measured by dead-load shear per ASTM D3654 on bonded polyester board coupons; a displacement criterion of <0.5 mm over 24 h at 40°C/80% RH is used by some converters. Blocking resistance is measured by ASTM D1146 or ISO 11502 after stacking at 50°C for 4 h. Published data for EVA 1125 in this specific converter configuration is limited; internal plant qualification remains mandatory.
Where coextruded cast film structures require a low-polarity copolymeric processing aid for LLDPE-rich tie-layer compounds, EVA 1125 is introduced at 3–8 wt% as a melt viscosity depressant. The melt flow index of 25 g/10 min under 190°C/2.16 kg lowers die pressure and delays melt fracture onset at draw ratios above 15:1 when compared with unmodified LLDPE. The low 11 wt% vinyl acetate content limits interfacial adhesion to nylon and EVOH, so EVA 1125 cannot replace maleic anhydride-grafted polyethylene as the primary tie resin. Twin-screw compounding at 300–400 rpm with barrel temperatures of 180–200°C is used to disperse EVA 1125 into the polyolefin matrix; domain size is kept below 5 μm to avoid gel-like optical defects in cast film. In ionomer-free LLDPE, addition of EVA 1125 may reduce dart impact strength measured by ASTM D1709 method A; converter-specific trials are required because published data for this exact grade blend is limited.
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Among low-vinyl-acetate ethylene-vinyl acetate copolymers, HANWHA EVA 1125 is classified by a nominal vinyl acetate content of 11 wt% and a melt flow index of 25 g/10 min at 190 °C under a 2.16 kg load, measured according to ISO 1133-1:2022. The pelletized resin has a typical density of 0.934 g/cm³ under ISO 1183-1:2019, a melting endotherm near 91 °C by ISO 11357-3:2018, and a Vicat softening temperature of approximately 64 °C under ISO 306:2022 using the A/120 method. The grade is supplied in pellet form and is used in hot-melt adhesives, foam extrusion, masterbatch carriers, and flexible wire-and-cable compounds. Its low vinyl acetate content distinguishes it from higher-VA grades by increasing stiffness, tensile strength, and heat resistance while reducing tack, polarity, and elongation at break.
On commercial polyolefin conversion lines, the material is typically processed as a modifier or carrier resin rather than as a stand-alone film resin. Because the melt flow index is high, line operators often reduce barrel temperatures by 10–20 °C relative to LDPE grades with equivalent melt flow index to avoid overplasticization and head-pressure instability.
The grade belongs to the low-VA segment of the EVA family and is therefore closer in mechanical behavior to low-density polyethylene than to elastomeric high-VA copolymers. This positioning affects dispersibility in hot-melt adhesives, dimensional stability in foamed sheet, and polarity-dependent adhesion in coextruded structures.
The 11 wt% vinyl acetate comonomer introduces polar acetate side groups along the polyethylene backbone, lowering crystallinity and melting point compared with low-density polyethylene homopolymer. The 25 g/10 min melt flow index places the material in a low-viscosity regime suitable for adhesive application and filler wetting. Capillary rheometry under ISO 11443:2021 at 180 °C and a shear rate of 10³ s⁻¹ typically produces apparent viscosity below 50 Pa·s, which allows high filler loadings and thin die lips without excessive backpressure. The shear-thinning index between 10² s⁻¹ and 10³ s⁻¹ is moderate; melt temperature changes above 200 °C reduce viscosity more strongly than further increases in screw speed. The manufacturer does not publish complete molecular weight distribution data for this grade, so rheological control on the shop floor is normally based on melt flow index and melt pressure.
For incoming inspection, batch-to-batch melt flow index variation is typically controlled within ±2 g/10 min to maintain adhesive pot life and extrusion output. A variation greater than ±2 g/10 min shifts the required gear-pump suction pressure and can change coat weight in slot-die adhesive application.
Thermal stability in air is typically monitored by thermogravimetric analysis at 10 °C/min; onset of mass loss normally occurs above 300 °C, but melt processing is limited by oxidation rather than by pyrolysis. Addition of antioxidant masterbatch at 0.1–0.3 wt% is common in adhesive formulations intended for prolonged hot-melt tank residence.
| Property | Value | Test method |
|---|---|---|
| Vinyl acetate content | 11 wt% | ASTM D5594-18 |
| Melt flow index | 25 g/10 min | ISO 1133-1:2022 |
| Density | 0.934 g/cm³ | ISO 1183-1:2019 |
| Melting temperature | 91 °C | ISO 11357-3:2018 |
| Vicat softening temperature | 64 °C | ISO 306:2022 A/120 |
| Tensile strength at break | 15 MPa | ISO 527-2:2012 |
| Elongation at break | 700% | ISO 527-2:2012 |
| Hardness | 93 Shore A | ISO 7619-1:2010 |
In hot-melt adhesive production, throughput is limited less by melt viscosity than by filler wetting and thermal degradation. On a co-rotating twin-screw extruder with a 40:1 L/D ratio and segmented screw elements, barrel settings from 120 °C at the feed throat to 160 °C at the die are used to maintain melt temperatures below 180 °C. If melt temperature exceeds 200 °C, oxidative chain scission accelerates and the melt flow index increases, producing viscosity drop and char formation at the die lip. Adhesive compounds containing 30–40 wt% resin-extended hydrocarbon tackifiers can be processed without exceeding 70% of drive torque, but die pressure becomes unstable when filler loading exceeds 40 wt% at screw speeds above 350 min⁻¹. Nitrogen blanketing or desiccant drying is required when ambient relative humidity exceeds 60%; moisture above 0.05 wt% produces surface voids and reduces peel adhesion in the applied adhesive.
The processing window is narrow when tackifiers with softening points above 110 °C are added; the practical melt temperature range is ±5 °C around 160 °C because lower temperatures produce unmelted gel flecks and higher temperatures begin to degrade the tackifier. Operators using gear pumps typically set suction pressure below 20 bar to avoid cavitation at high screw speeds.
Tackifier compatibility should be checked by film clarity after compression molding at 160 °C and by ring-and-ball softening point retention under ASTM D36-09. A drop in softening point greater than 5 °C after 72 h at 180 °C indicates resin aging.
Limitations: EVA 1125 should not be combined with amine-based antistatic additives or unneutralized basic fillers because residual basic species can catalyze deacetylation at processing temperatures above 200 °C, releasing acetic acid and corroding downstream equipment. Pre-drying at 60 °C for 4 h in a desiccant dryer with a dew point of −40 °C is recommended before extrusion when moisture content exceeds 0.05 wt%.
For cross-linked foam extrusion, EVA 1125 is blended with chemical blowing agents such as azodicarbonamide or oxybis(benzenesulfonyl hydrazide). The decomposition temperature of azodicarbonamide is approximately 205 °C, which requires a barrel profile no higher than 170 °C in the compression zone to avoid premature nucleation. On a 65 mm single-screw extruder with a 30:1 L/D barrier screw, a typical profile is 130 °C feed, 150 °C compression, 165 °C metering, and 160 °C die. Lower vinyl acetate content compared with an 18 wt% VA foam grade reduces polar adhesion to metal surfaces, which can reduce screw fouling but also reduces moisture uptake and can lower the solubility of polar blowing agents. Published data for this specific configuration is limited; gel content after peroxide crosslinking should be measured by ASTM D2765-16 and is typically controlled between 60% and 70% for foam closure and compression set resistance.
Foam density variations on a 65 mm line have been observed when die pressure deviates more than 5 bar from the set point, because gas nucleation is pressure-dependent. A melt pump upstream of the die is used to reduce pressure pulsation and maintain cell size uniformity. When the melt temperature at the die exceeds 175 °C, the blowing agent decomposes before leaving the die and surface blistering occurs.
When used as a masterbatch carrier, the low melt viscosity of EVA 1125 permits carbon black concentrations up to 40 wt% on a co-rotating twin-screw extruder with a 40:1 L/D geometry. Melt temperatures are maintained between 170 °C and 190 °C; exceeding 220 °C causes thermal degradation and increased volatiles. The carrier is let down at ratios between 2% and 5% in polyolefin films. Film-blowing lines with 1.5 mm die gaps should not exceed 220 °C melt temperature to prevent gel formation. In injection molding of masterbatch-containing polypropylene, clamp force requirements are normally governed by the base resin, not by the EVA carrier.
Pigment dispersion quality should be assessed by pressure rise on a 14 µm extruder screen pack. A pressure increase above 5 bar/h indicates undispersed agglomerates and requires adjustment of screw configuration or masterbatch letdown ratio.
Substitution of EVA 1125 for a 28 wt% VA grade raises tensile strength and hardness but reduces elongation and low-temperature flexibility. Under ASTM D638-14 Type IV testing at 50 mm/min, tensile strength at break is approximately 15 MPa and elongation at break is approximately 700%; the higher-VA reference exhibits tensile strength near 8 MPa and elongation above 800%. Hardness is approximately 93 Shore A under ASTM D2240-15, which improves crush resistance but limits installation flexibility below −20 °C. The lower vinyl acetate content reduces dielectric constant to approximately 2.4 at 1 MHz under IEC 60250, whereas a 28 wt% VA grade may show 2.8. Adhesion to copper and aluminum conductors is lower; a tie layer or primer is required when jacket integrity under wet aging is specified by UL 44 or IEC 60502-1.
For extrusion jacketing on a 60 mm single-screw extruder with a 24:1 L/D polyethylene screw, barrel temperatures from 140 °C to 175 °C produce a smooth jacket surface. Above 180 °C, oxidative degradation can create surface roughness and color shift; below 140 °C, backpressure rises and conductor adhesion becomes inconsistent. The material is not a direct drop-in replacement for higher-VA grades in applications requiring UL 62 low-temperature flexibility or flame-retardant formulations containing high loadings of melamine cyanurate because the lower polarity reduces filler incorporation stability.
For flame-retardant insulation, the resin can be compounded with 60–70 wt% mineral fillers such as aluminum hydroxide or magnesium hydroxide, but the coil life of the cable line may decrease because the low VA content provides less adhesion between filler particles and matrix. In such formulations, elongation retention after 7 days at 121 °C should be measured using ASTM D638-14 and is often below 50% unless coupling agents are used.
| Property | EVA 1125 (11 wt% vinyl acetate) | Reference grade (28 wt% vinyl acetate) | Test method |
|---|---|---|---|
| Density | 0.934 g/cm³ | 0.950 g/cm³ | ISO 1183-1:2019 |
| Tensile strength at break | 15 MPa | 8 MPa | ISO 527-2:2012 |
| Elongation at break | 700% | 850% | ISO 527-2:2012 |
| Hardness | 93 Shore A | 80 Shore A | ISO 7619-1:2010 |
| Melting temperature | 91 °C | 70 °C | ISO 11357-3:2018 |
| Dielectric constant at 1 MHz | 2.4 | 2.8 | IEC 60250 |
Storage and regulatory handling are governed by the same boundary conditions. Store pellets below 30 °C and below 60% RH. If surface moisture exceeds 0.05 wt%, pre-drying at 60 °C for 4 h in a desiccant dryer with −40 °C dew point is required. Do not expose the resin to direct sunlight for prolonged periods because UV-induced surface oxidation can shift the melt flow index. The neat resin is typically registered under REACH and is not classified as hazardous under CLP Regulation (EC) No 1272/2008. For food-contact use, finished-article testing under EU Regulation 10/2011 and FDA 21 CFR 177.1520 is required because process additives and degradation products determine final compliance. Directive 2011/65/EU RoHS restrictions apply to the finished article; a neat olefinic copolymer generally does not contain Pb, Cd, Hg, Cr(VI), PBB, or PBDE above the maximum concentration values, but analytical verification is required.
Incompatibility: Avoid combinations with amine-based stabilizers or basic fillers above 200 °C because deacetylation may generate acetic acid and reduce molecular weight. The product is not recommended for continuous exposure above 80 °C without crosslinking or antioxidant stabilization. Processing equipment with long residence times above 30 min at melt temperatures above 180 °C should be avoided because viscosity can drift out of specification.
