| HS Code | 284521 |
| Vinyl Acetate Content | 14% |
| Melt Flow Rate | 4 g/10min (190°C/2.16kg) |
| Density | 0.940 g/cm³ |
| Melting Point | 91°C |
| Crystallization Point | 63°C |
| Vicat Softening Point | 60°C |
| Shore A Hardness | 94 |
| Shore D Hardness | 42 |
| Tensile Strength At Break | 16 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 35 MPa |
| Brittleness Temperature | -70°C |
As an accredited EVAtech EVA 140S/4 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVAtech EVA 140S/4 Ethylene Vinyl Acetate Copolymer supplied in 25 kg polyethylene-lined paper bags with moisture protection for safe handling. |
| Container Loading (20′ FCL) | 20′ FCL loading of EVAtech EVA 140S/4 ethylene vinyl acetate copolymer, packed in bags on pallets, secured and ventilated. |
| Shipping | EVAtech EVA 140S/4 is shipped as solid pellets in sealed, moisture-resistant bags or drums. Keep dry, avoid direct sunlight and temperatures above 40°C. No special hazard classification applies, but standard chemical handling precautions and clean transport equipment are recommended to prevent contamination and preserve product quality. |
| Storage | Store EVAtech EVA 140S/4 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture uptake and contamination. Avoid contact with strong oxidizers. Maintain moderate ambient temperatures; under proper conditions, shelf life is typically 12 months from date of delivery. |
| Shelf Life | EVAtech EVA 140S/4 has a shelf life of two years when stored unopened in original packaging under cool, dry conditions. |
EVAtech EVA 140S/4, with a nominal vinyl acetate content of 14 wt% and a melt mass-flow rate of 4 g/10 min per ISO 1133-1:2022 at 190 °C/2.16 kg, is processed in crosslinked foam compounds. Compounding on a 55 L Banbury internal mixer or an 18 in two-roll mill uses a drop temperature of 100–115 °C; azodicarbonamide blowing agent is charged at 2.0–4.5 phr, dicumyl peroxide at 0.6–1.2 phr, zinc oxide at 0.5–1.5 phr, and precipitated calcium carbonate at 5–20 phr. The cure/blow balance is maintained by the decomposition onset of dicumyl peroxide at 135–145 °C and azodicarbonamide gas release at 165–185 °C; mismatch between the two rates produces either premature crosslinking before gas evolution or gas escape with cell collapse. Finished slabs are compression molded in 200–400 t hydraulic presses at 160–175 °C under 10–20 MPa for 8–12 min, then cooled to 50 °C. Crosslinked foam density from the same mixer typically varies by ±0.02 g/cm³ when drop temperature is controlled within ±3 °C. Density is tested per ASTM D3575-20, tensile properties per ISO 1798:2012, and compression set per ASTM D395-18. Compliance for exported footwear components includes REACH 1907/2006 Annex XVII entries for restricted aromatic amines and polycyclic aromatic hydrocarbons, with heavy metal release limits assessed under EN 71-3:2019 where the component is considered accessible to children. Terminal product types include crosslinked midsoles, insoles, compression-molded sheet stock for die-cut shoe components, and low-density cushioning inserts.
High-loading polyolefin masterbatch production with EVA 140S/4 as carrier resin is governed by the melt-temperature ceiling set by organic pigment decomposition and the shear stress required to deagglomerate carbon black or titanium dioxide. On a co-rotating twin-screw extruder with L/D 36–44 and screw diameter 40–75 mm, barrel temperatures are kept at 150–195 °C from feed to die, while screw speed is set to 400–800 rpm; specific mechanical energy input typically falls between 0.18–0.28 kWh/kg. The carrier phase comprises 15–30 wt% EVA 140S/4, 50–70 wt% pigment or mineral filler, 5–10 wt% polyethylene wax, and 0.2–0.8 wt% primary antioxidant; the EVA fraction must remain above 15 wt% to maintain melt strength during downstream dilution. Pellets are dried at 60–70 °C for 2–4 h when storage relative humidity exceeds 60%, using desiccant dryers with dew point ≤ −30 °C; residual moisture is held below 0.05 wt% per ISO 15512:2019. Dispersion quality is assessed by screen-pack pressure rise across the 80/120/80 mesh pack; an increase above 2.0 MPa indicates agglomerate breakthrough. Compliance for masterbatch supplied to toys and food packaging includes migration of specific elements under EN 71-3:2019, the EU RoHS Directive 2011/65/EU Annex II restrictions for lead, cadmium, mercury, and hexavalent chromium, and REACH 1907/2006 substance restrictions. Finished product types are pigment masterbatches for LLDPE and LDPE blown film, carbon black masterbatches for geomembranes, and additive masterbatches for injection-moulded polypropylene compounds.
During compounding of halogen-free flame-retardant cable sheathing compounds, the thermal decomposition onset of aluminium trihydroxide at 180–200 °C imposes a maximum melt temperature of 150 °C at the die, because premature water loss generates internal porosity in the extrudate. EVA 140S/4 is melt-blended with aluminium trihydroxide at 100–180 phr, magnesium hydroxide at 10–60 phr, dicumyl peroxide at 1.0–1.6 phr, and vinyl silane coupling agent at 0.5–1.5 phr; the EVA content of the finished compound is typically 30–50 wt%. Amine-based stabilizers are excluded from the formulation because they scavenge free radicals and retard dicumyl peroxide crosslinking. Compounding is executed on a co-rotating twin-screw extruder with L/D 40–48, screw speed 250–450 rpm, and barrel temperatures 120–145 °C in the first two zones and 140–150 °C at the die; a vacuum port at −0.08 MPa removes residual moisture. Sheathing is applied on a single-screw extrusion line with L/D 24–30 and cable crosshead die temperatures of 135–150 °C, then cured through a continuous vulcanization tube at 180–200 °C and 1.2–2.0 MPa steam pressure for 3–6 min. Limiting oxygen index values above 30% are typical when aluminium trihydroxide loading exceeds 130 phr, tested per ISO 4589-2:2017. Fire performance is tested per IEC 60332-1-2:2015, smoke emission per IEC 61034-2:2005, and halogen acid gas release per IEC 60754-1:2011; tensile properties are measured per ISO 527-2:2012. Terminal product types include halogen-free low-smoke sheathing for control cables, building wire jackets, and photovoltaic string cable insulation.
Single-screw extrusion lines with L/D 24–30 and 45–75 mm screw diameter process EVA 140S/4 at barrel temperatures of 165–190 °C and die temperatures of 175–195 °C, using screen packs of 80/120/80 mesh to generate backpressure and remove gel particles. The compound consists of 60–90 wt% EVA 140S/4, 10–40 wt% linear low-density polyethylene, 0.3–1.0 wt% processing aid, and 1–3 wt% color masterbatch; the LLDPE fraction is limited to 40 wt% to preserve low-temperature brittleness below −40 °C tested per ASTM D746-20. Extruded profile dimensions are controlled with vacuum calibration tanks at −0.02 to −0.04 MPa and water temperatures of 15–25 °C. Compliance for construction and automotive profiles includes REACH 1907/2006 substance restrictions, RoHS Directive 2011/65/EU, and flammability classification under UL 94 HB where applicable. Terminal product types are furniture edge trim, bumper profiles, refrigerator gaskets, and low-torsion sealing strips.
Injection molding of EVA 140S/4 on 400–800 t hydraulic toggle injection machines with screw diameters of 55–80 mm is conducted at barrel temperatures of 170–205 °C, injection pressures of 50–80 MPa, and mold temperatures of 20–40 °C; melt residence time is limited to ≤5 min to avoid vinyl acetate degradation and acetic acid odor. The molding formulation uses 85–100 wt% EVA 140S/4, 0–15 wt% high-density polyethylene, 0.2–0.8 wt% antioxidant, and 1–4 wt% pigment masterbatch; mold shrinkage is recorded at 1.2–1.8% after 48 h post-molding conditioning per ISO 294-4:2018. Tensile properties are tested per ASTM D638-14, hardness per ISO 868:2003, and Charpy unnotched impact resistance per ISO 179-1:2010. Compliance for automotive interior parts requires flammability per ISO 3795:1989 and substance declaration under GADSL where applicable. Published data for this specific configuration is limited, and mold shrinkage validation on the production tool is required before serial release. Terminal product types are cable grommets, flexible connectors, low-load vibration isolators, protective caps, and injection-moulded damping mounts.
Cast film lines processing EVA 140S/4 for food-contact interleaving operate with 30–75 mm single-screw extruders, barrel temperatures 160–195 °C, die temperatures 185–200 °C, and chill roll temperatures 15–25 °C; air gap is held at 8–12 cm to control neck-in. Blown film extrusion uses a die gap of 0.8–1.2 mm and blow-up ratio of 1.8–2.5 to maintain gauge variation below ±5% per ISO 4593:2019. The base formulation contains 85–100 wt% EVA 140S/4, 0–15 wt% LLDPE, and 0.5–1.5 wt% slip/antiblock masterbatch; the slip additive concentration is selected to maintain a coefficient of friction below 0.4 per ISO 8295:2018. Pellets are dried at 60–70 °C for 2–4 h when storage relative humidity exceeds 60%, using desiccant dryers with dew point ≤ −30 °C. Food-contact compliance is assessed under FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers and under EU Regulation (EU) No 10/2011 with overall migration limits of 10 mg/dm² and specific migration limits where referenced in Annex I. Terminal product types include interleaving film, dairy lidding film, food-contact surface protection sheet, and bag-in-box liners.
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EVAtech EVA 140S/4 is an ethylene vinyl acetate copolymer with a nominal vinyl acetate comonomer content of 14 wt% and a melt flow index of 4 g/10 min determined at 190 °C under a 2.16 kg load in accordance with ISO 1133-1:2022. The melt density at 190 °C is 0.934 g/cm³ to 0.937 g/cm³ when measured by ISO 1183-1:2019. The grade is supplied as cylindrical pellets with a standard antioxidant and thermal stabiliser package; the “S” suffix denotes a standard additive formulation rather than a high-slip or antiblock masterbatch. The product code identifies the 14 wt% vinyl acetate level and the nominal melt flow index of 4 g/10 min.
Dry blending with low-density polyethylene at 10–30 wt% addition rates in blown film lines equipped with single-screw extruders of L/D 30 and die gaps of 1.2 mm to 1.8 mm is supported by the grade’s melt rheology. Melt temperatures at the die are maintained between 180 °C and 200 °C; above 210 °C, the rate of acetic acid elimination increases and corrosion of chromed die lips becomes measurable after continuous runs exceeding 72 h. The resulting 50 μm film exhibits a seal initiation temperature of 88 °C to 96 °C under 0.5 MPa seal pressure and 0.5 s dwell time when tested according to ASTM F88/F88M-21, while the hot-tack window opens above 110 °C because of residual LDPE crystallinity. This combination is specified for form-fill-seal packaging where low seal temperature is required but surface blocking must remain below the level observed with EVA copolymers of 18 wt% to 28 wt% vinyl acetate.
In extrusion coating and paperboard lamination, the lower vinyl acetate content of 14 wt% allows higher line speeds than EVA 28 wt% because the melt has less adhesion to chilled rolls and release occurs at lower coefficient of friction. Melt temperature in the extruder, adapter, and die is held at 190 °C to 210 °C; exceeding 230 °C reduces adhesion due to degradation and produces odour. In coextrusion coating where EVA 140S/4 is used as a heat-seal layer on paperboard, the coating weight is typically 12–20 g/m² and the minimum seal temperature on a cup-forming line is approximately 95 °C at 0.3 s dwell. This positions the grade between LDPE extrusion-coating resins and EVA 28 wt% sealant grades: it provides better sealability than LDPE but requires more heat than a high-VA sealant.
At 14 wt% vinyl acetate, the copolymer retains a higher crystalline fraction than EVA grades with 18 wt% or 28 wt% vinyl acetate, raising flexural modulus and reducing elongation at break. The crystalline melting peak is 92 °C to 94 °C, and the Vicat softening temperature under 10 N load and 50 K/h heating rate is 71 °C to 73 °C per ISO 306:2022. In comparison with LDPE homopolymer, the vinyl acetate groups disrupt the ethylene sequences sufficiently to lower seal initiation temperature and improve low-temperature impact; nevertheless, the grade does not reach the aggressive tack and low-temperature flexibility of 28 wt% vinyl acetate copolymers used in hot-melt adhesives. In hot-melt adhesive compounding, EVA 140S/4 is processed at 150 °C to 170 °C in sigma-blade mixers or continuous twin-screw extruders with L/D 40 and vacuum venting. High-shear dispersion at 40–60 rpm rotor speed disperses paraffin wax and tackifying resin; the lower vinyl acetate content of 14 wt% compared with hot-melt grades of 28 wt% reduces low-temperature tack and creates a harder adhesive film, which is suitable for carton side-seam applications where compression strength after cooling is more important than pressure-sensitive tack.
| Property | EVA 140S/4 | EVA 18 wt% | EVA 28 wt% | Test method |
|---|---|---|---|---|
| Density | 0.934 g/cm³ | 0.940 g/cm³ | 0.950 g/cm³ | ISO 1183-1:2019 |
| Melting peak | 92–94 °C | 84–86 °C | 72–74 °C | ASTM D3418-21 |
| Vicat softening | 71–73 °C | 58–62 °C | 34–38 °C | ISO 306:2022 A50 |
| Tensile strength at yield | 16–18 MPa | 14–16 MPa | 8–12 MPa | ASTM D638-14 |
| Elongation at break | 700–800% | 750–850% | 800–900% | ASTM D638-14 |
| Shore A hardness | 94–96 | 90–92 | 79–83 | ISO 868:2003 |
The data in the table represent typical values for non-slip EVA copolymers with melt flow indices near 4 g/10 min; published data for this specific grade configuration is limited, but the comparative spread is consistent with producer datasheets and ASTM/ISO characterisation protocols. Differences from higher-VA analogues are most pronounced in hardness, flexural modulus, and seal initiation. A converter substituting EVA 140S/4 for EVA 28 wt% in blown film should anticipate a 20–30 °C increase in minimum seal temperature and improved stiffness but reduced puncture resistance at sub-zero storage temperatures. EVA 140S/4 also differs from LDPE homopolymer in environmental stress crack resistance. Under ASTM D1693-21 in 10% Igepal CO-630 at 50 °C, 2 mm compression-moulded plaques typically exceed 300 h to failure, whereas LDPE homopolymer of equivalent melt index may fail between 30 h and 60 h; plaque preparation and thermal history affect the absolute values.
Injection moulding of EVAtech EVA 140S/4 is performed with barrel settings from 150 °C at the feed throat to 200 °C at the nozzle; mould temperature is held between 20 °C and 40 °C for rapid solidification. The grade does not require pre-drying when stored in sealed packaging at relative humidity below 60%; if exposed, drying for 2–4 h at 60 °C to 70 °C with desiccant or dehumidified-air equipment is specified to reduce residual moisture below 0.05 wt%. Higher drying temperatures risk pellet agglomeration because the Vicat softening point is close to 71 °C. The non-isothermal crystallisation temperature at 10 K/min cooling is 78 °C to 82 °C by ASTM D3418-21. In injection moulding this correlates with set-up time; a mould temperature of 25 °C solidifies the skin quickly, but parts thicker than 4 mm may require hold pressure sufficient to compensate for shrinkage.
In crosslinked foam production, the compound is mixed on a two-roll mill at 95 °C to 110 °C or in an internal mixer with ram pressure sufficient to maintain batch temperature below 120 °C. Dicumyl peroxide at 0.8 phr to 1.2 phr provides a gel fraction of 80% to 90% after compression moulding at 160 °C for 12 min in a press with 150 kN clamp force. When peroxide loading exceeds 1.5 phr, the cure exotherm narrows the processing window and produces surface scorch and non-uniform cell diameter; this boundary cannot be corrected by reducing blowing agent. Azodicarbonamide at 2 phr to 6 phr with a gas yield of 220 ml/g at 205 °C is used as the blowing agent. The compound temperature must be ramped from 120 °C to 165 °C at 4 °C/min; faster ramps initiate gas evolution before sufficient crosslinks form, causing cell collapse, while slower ramps produce over-cured skin layers. Published data for this specific EVA 140S/4 grade is limited, so these cure and blowing-agent boundaries are drawn from equivalent EVA copolymers with 14 wt% vinyl acetate and melt flow indices of 3–5 g/10 min.
In three-layer cast film with an EVA 140S/4 sealant skin and LDPE core, the use of 14 wt% vinyl acetate instead of 28 wt% vinyl acetate raises the minimum seal initiation temperature but reduces coefficient of friction and blocking. On high-speed vertical form-fill-seal lines operating at 80–120 cycles/min, a sealant layer containing EVA 28 wt% may exhibit blocking on the forming collar and film guides, requiring increased slip additive to maintain machine speed. EVA 140S/4 can be processed with 500 ppm to 1,000 ppm erucamide or oleamide, whereas the same line speed with EVA 28 wt% may require 1,500 ppm or an inorganic antiblock. The trade-off is loss of low-temperature seal performance: the 14 wt% grade normally reaches a seal strength of 4 N/15 mm only above 100 °C, while the 28 wt% grade reaches the same seal strength at 75 °C to 85 °C. This substitution is therefore limited to packages stored above 0 °C and to films where stiffness during filling is desirable.
EVA copolymers are permitted for food-contact use under FDA 21 CFR 177.1350 when the vinyl acetate content does not exceed 50 wt% and extractives comply with the prescribed limits. In the European Union, plastics intended for food contact must comply with Regulation (EU) No 10/2011; vinyl acetate monomer has a specific migration limit of 12 mg/kg food or food simulant, and the overall migration limit is 10 mg/dm² for plastic materials. Migration kinetics of vinyl acetate monomer in fatty food simulants are generally faster than in aqueous simulants; therefore, testing in isooctane or 95% ethanol under EN 1186-14 is often the limiting condition. EVAtech EVA 140S/4 is manufactured with residual vinyl acetate monomer below the quantification threshold used in EN 1186 migration testing, although final article compliance depends on the entire formulation, including slip additives, processing aids, and printing inks. Under REACH, no substance of very high concern is present above the reporting threshold of 0.1 wt%. Under RoHS 2011/65/EU, the copolymer does not contain lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above the maximum concentration values, subject to supplier documentation.
| Framework | Relevant provision | Condition for use |
|---|---|---|
| FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers | VA content ≤ 50 wt%; extractives limits |
| Regulation (EU) No 10/2011 | Plastics in food contact | VAM SML 12 mg/kg; OML 10 mg/dm² |
| REACH | SVHC reporting | No SVHC above 0.1 wt% |
| RoHS 2011/65/EU | Hazardous substances | Pb, Hg, Cd, Cr VI, PBB, PBDE below MCV |
Compatibility with peroxide masterbatches, azodicarbonamide, and slip additives must be verified in the final compound. The grade is not recommended for continuous melt processing above 220 °C because vinyl acetate degradation releases acetic acid, and prolonged residence in chromed or nitrided steel equipment can cause pitting at weld lines and sensor ports. Avoid contact with strong bases, strong acids, and amine-based stabilisers in masterbatches; free amines accelerate ester hydrolysis and can reduce molecular weight during storage of compounded pellets. If reprocessed material is used, it should be limited to 20 wt% in cast film to maintain gel level, seal initiation, and organoleptic properties.
