| HS Code | 837729 |
| Va Content | 14 wt% |
| Density | 0.934 g/cm³ |
| Melt Flow Index 190 C 2 16kg | 2.0 g/10min |
| Melting Point | 88 °C |
| Vicat Softening Point | 68 °C |
| Hardness Shore A | 94 |
| Tensile Strength At Break | 15 MPa |
| Elongation At Break | 750% |
| Flexural Modulus | 46 MPa |
| Brittleness Temperature | -80 °C |
As an accredited EVAtech EVA 140T/2 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 140T/2 ethylene vinyl acetate copolymer is packaged as solid pellets in 25 kg multi-wall paper bags with moisture barrier. |
| Container Loading (20′ FCL) | 20′ FCL: EVAtech EVA 140T/2 copolymer loaded in 25 kg bags on pallets, stowed securely for safe transport. |
| Shipping | EVAtech EVA 140T/2 is supplied as granules in sealed paper or polypropylene bags, shrink-wrapped pallets, or bulk containers. Ship via dry, covered transport to prevent moisture contamination. Keep away from excessive heat, ignition sources, and direct sunlight. Handle with care to avoid bag damage, and store in a cool, ventilated area. |
| Storage | Store EVAtech EVA 140T/2 in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid storage near strong oxidizing agents. Maintain moderate temperatures to prevent softening, caking, or degradation. Ensure adequate ventilation and follow local regulations. |
| Shelf Life | Shelf life is typically 2 years when stored in original, unopened packaging away from heat and moisture. |
For athletic footwear midsole production, EVAtech EVA 140T/2 is formulated as a closed-cell cellular matrix with a vinyl acetate content of 14 wt% and a melt flow index of 2.0 dg/min measured under ISO 1133-1:2022. The base resin is combined with 0.8 phr to 1.0 phr dicumyl peroxide, 3.2 phr to 4.2 phr azodicarbonamide, 1.2 phr zinc oxide, and 0.6 phr stearic acid in a 75 L tangential Banbury mixer with a drop temperature of 112°C to 118°C. After pelletizing, the compound is injection-molded into preforms at 95°C to 105°C barrel temperature and then expanded in a compression mold at 168°C to 174°C. The expansion-stage processing window is held within ±4°C because the half-life of dicumyl peroxide at 170°C is approximately 1 min, while the gas yield of azodicarbonamide reaches 220 cm³/g at 210°C. A lower temperature of 164°C produces incomplete blowing and a higher temperature of 178°C accelerates crosslinking before cell inflation, yielding a collapsed cell structure with density above 0.25 g/cm³. Finished midsoles produced under these conditions exhibit a density of 0.14 g/cm³ to 0.18 g/cm³, a Shore A hardness of 50 to 65 per ASTM D2240, and rebound resilience of 45% to 55% per ISO 4662. Compliance for footwear exported to the EU requires verification of PAH content under REACH Annex XVII Entry 50 and organotin compounds below 0.1 wt% under REACH Annex XVII Entry 20. Final components include midsoles, sock liners, and foam sheets for die-cut insoles.
Adhesive compounding with EVAtech EVA 140T/2 is performed on a co-rotating twin-screw extruder with an L/D ratio of 48:1 and a low-shear screw profile to limit polymer chain scission at 160°C to 180°C. The molten adhesive is pelletized under water-ring cutting and later applied at 170°C to 190°C from a slot die coating line. A typical packaging-grade formulation contains 35 wt% EVA 140T/2, 38 wt% hydrogenated glycerol ester tackifier with a softening point of 95°C, 22 wt% Fischer–Tropsch wax with a congealing point of 96°C, and 0.8 wt% hindered phenolic antioxidant plus phosphite stabilizer. Open time on corrugated board at 25°C ranges from 2 s to 5 s, while setting speed is 0.8 s to 1.5 s on kraft liner. Low-temperature fiber tear below −10°C remains acceptable when wax content does not exceed 25 wt% and tackifier content is not reduced below 32 wt%. A melt viscosity of 800 mPa·s to 1,200 mPa·s at 180°C measured by ASTM D3236-15 allows application by gear pump without nozzle clogging. For indirect food contact packaging, the formulated adhesive must comply with FDA 21 CFR 175.105 and 21 CFR 176.170. For EU food-contact paper and board, migration of monomers and additives is assessed under Regulation (EU) No 10/2011 and organoleptic transfer is tested per EN 1230-1. Terminal products include case and carton sealing hot melts, bookbinding adhesives, and assembly adhesives for nonwoven hygiene article construction.
| Formulation variable | Condition A | Condition B | Condition C |
|---|---|---|---|
| EVA 140T/2 | 30 wt% | 35 wt% | 40 wt% |
| Tackifier | 33 wt% | 38 wt% | 41 wt% |
| Fischer–Tropsch wax | 22 wt% | 22 wt% | 18 wt% |
| Antioxidant | 0.8 wt% | 0.8 wt% | 0.8 wt% |
| Melt viscosity at 180°C by ASTM D3236-15 | 650 mPa·s | 900 mPa·s | 1,400 mPa·s |
| Fiber tear at −10°C | partial | pass | pass |
In low-voltage cable jacketing, halogen-free flame-retardant insulation compounds are produced by compounding EVAtech EVA 140T/2 with linear low-density polyethylene and an aluminium trihydroxide-magnesium dihydroxide filler system in a 65:1 L/D co-rotating twin-screw extruder. The formulation ratio of EVA 140T/2 to LLDPE is maintained between 70:30 and 60:40 by weight, and total metal hydroxide loading is held at 150 phr to 180 phr. A silane coupling agent of 1.0 phr to 1.5 phr is pre-absorbed on the filler, and an antioxidant masterbatch based on a hindered phenol-thioester system is added at 0.4 phr. Pre-drying at 80°C for 4 h is required when storage relative humidity exceeds 60%. The compound is pelletized at a melt temperature below 190°C to avoid premature release of water from ATH, which begins at 180°C to 200°C. Extrusion of a 1.5 mm jacket onto twisted copper conductors uses a single-screw extruder with a 90 mm screw diameter and L/D ratio of 30:1, a screen pack of 80/120/80 mesh, and a compression screw with a Maddock mixing section. The melt temperature at the die is controlled to 150°C to 165°C. The resulting jacket passes the vertical flame spread test of IEC 60332-1-2 when the limiting oxygen index of the compound exceeds 28% measured by ISO 4589-2. Tensile strength before ageing is not less than 10 MPa and elongation at break not less than 150% after ageing at 100°C for 168 h under IEC 60811-501. The final application covers single-core and multi-core control cables, appliance wiring, and low-smoke zero-halogen building wire marketed under CPR Euroclass D or C where smoke density per IEC 61034-2 permits.
| Test parameter | Test standard | Typical acceptance limit |
|---|---|---|
| Vertical flame spread | IEC 60332-1-2 | char height ≤ 425 mm |
| Smoke density | IEC 61034-2 | minimum light transmittance ≥ 60% |
| Limiting oxygen index | ISO 4589-2 | ≥ 28% |
| Tensile strength and elongation at break | IEC 60811-501 | ≥ 10 MPa, ≥ 150% |
| Polycyclic aromatic hydrocarbons | AfPS GS 2019:01 PAK | Category 1 ≤ 1 mg/kg |
Compounding EVAtech EVA 140T/2 into polypropylene impact modification requires a specific screw geometry to manage the viscosity difference between the 14 wt% vinyl acetate copolymer and a 3 dg/min polypropylene homopolymer. A co-rotating twin-screw extruder with an L/D ratio of 40:1 and two kneading blocks is operated at 200°C to 230°C. The addition level of EVA 140T/2 is constrained to 10 wt% to 25 wt%; addition above 30 wt% causes a phase inversion that reduces flexural modulus below 600 MPa measured by ISO 178:2019. At 15 wt% loading, the notched Izod impact strength at 23°C increases to 8 kJ/m² to 12 kJ/m² from a baseline of 3 kJ/m² to 5 kJ/m² for the unmodified homopolymer under ISO 180:2020. At −20°C, the improvement is less pronounced, and published data for this specific configuration is limited. The process requires a downstream injection-molding stage with a clamp force of 2,000 kN to 5,000 kN and an injection speed of 60 mm/s to 100 mm/s to avoid surface delamination. Mold shrinkage is approximately 1.2% to 1.6%, compared with 1.0% to 1.3% for the base polypropylene, and is measured by ISO 294-4. The modified material is used in automotive interior trim, battery cases, and appliance housings where low-temperature ductility is required but full elastomer modification is not cost-justified. Compliance for automotive interior parts includes odour testing under VDA 270 and VOC emissions under VDA 278; appliance housings require glow-wire ignition temperature above 650°C under IEC 60695-2-11.
Carbon black masterbatch production using EVAtech EVA 140T/2 as the carrier resin is carried out in a kneader-type mixer or a twin-screw extruder with a dispersive screw design because the melt flow index of 2.0 dg/min provides higher shear stress than carriers based on wax or low-molecular-weight polyethylene. A typical formulation consists of 45 wt% to 50 wt% furnace black with a primary particle size of 25 nm to 35 nm, 5 wt% to 8 wt% PE wax, and the balance EVA 140T/2. The mixing temperature is maintained at 150°C to 170°C to prevent thermal decomposition of the vinyl acetate groups, which can release acetic acid above 200°C. The masterbatch is strand-pelletized through a die plate with 3 mm holes and a die-face cutter speed of 900 rpm to 1,200 rpm. Dispersion is evaluated by a filter pressure value below 2 bar/g on a 14 µm screen pack using ISO 13357-1. Terminal products include black masterbatch for agricultural film, stretch film, and injection-molded crates where the final carbon black loading is 1.5 wt% to 2.5 wt%. The carrier complies with EU Directive 94/62/EC for packaging and packaging waste when heavy metal sum concentration is below 100 mg/kg per EN 13428 and EN 13430.
At 8 wt% loading in straight-run bitumen, EVAtech EVA 140T/2 shifts the softening point from 85°C to 105°C under ASTM D36/D36M, and low-temperature flexibility passes a −10°C bend test without cracking under ASTM D5147. The copolymer content in the membrane compound is held between 5 wt% and 12 wt% based on the total bitumen phase. Mixing is conducted in a vertical cylindrical tank with a bottom-entering disperser and an oil-jacketed wall temperature of 190°C at a rotor speed of 1,200 rpm to 1,500 rpm. After mixing, the modified bitumen is compounded with 35 wt% filler, 5 wt% elastomeric SBS, and 0.3 wt% process stabilizer in a paddle mixer before calendering onto a polyester carrier at 160°C to 170°C. The finished membrane has a thickness of 3 mm to 5 mm and a tensile strength of 600 N/50 mm to 900 N/50 mm in the longitudinal direction under ASTM D5147. Compliance for EU waterproofing membranes is assessed under EN 13707 for flexible sheets for waterproofing and EN 13969 for bitumen damp-proof courses. The terminal products include torch-applied membranes, self-adhesive membranes for foundations, and bridge deck waterproofing layers.
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Ethylene-vinyl acetate copolymer grade EVAtech EVA 140T/2 occupies the low-to-mid melt-flow segment of the EVA product family and is evaluated in flexible extrusion, film sealing, foam, and compounding operations where a controlled balance of melt strength, polarity, and thermal seal response is required. The alphanumeric designation is a logistics and grade identifier rather than a complete specification: vinyl acetate content is not uniformly encoded across producers, and final conversion behavior depends on the supplier certificate of analysis, additive package, and selected conversion line.
Under ISO 1133-1:2022 or ASTM D1238-20, EVA grades with a designation resembling 140 are commonly tested at 190 °C with 2.16 kg load. If the 140 is taken to indicate a nominal melt flow rate of 1.4 g/10 min, EVA 140T/2 falls below the high-melt-flow range used for hot-melt adhesives and within the range applied to blown film, profile extrusion, extrusion coating, and certain foam compounds. Incoming quality control should include melt mass-flow rate, density by ISO 1183-1:2019, tensile properties by ASTM D638-14 at 50 mm/min on Type IV specimens, hardness by ASTM D2240-15, and Vicat softening temperature by ISO 306:2022. Moisture content should be determined by Karl Fischer titration. If vinyl acetate content is not printed on the packaging, it can be checked by Fourier-transform infrared spectroscopy using the carbonyl absorbance ratio, by nuclear magnetic resonance spectroscopy, or by thermogravimetric decomposition under nitrogen to 600 °C. Published data for EVA 140T/2 as a specific formulation is limited; therefore, incoming QC limits should be derived from the current producer certificate of analysis rather than from generic EVA property tables.
Process stability in EVA 140T/2 is governed by the competition between achieving uniform melt temperature and avoiding vinyl acetate side-group elimination at the screw root and barrel wall. On single-screw extruders with 24:1 to 30:1 L/D and a barrier screw, typical EVA start-up conditions set the feed zone near 150 °C, the metering zone at 210–225 °C, and the die at 220–230 °C. Operation above 230 °C accelerates acetic acid release, reduces melt pH, and increases corrosion risk on polished rolls, die lips, and downstream metal surfaces. The working window is therefore narrower than for low-density polyethylene. A die-head temperature deviation of ±5 °C can shift melt viscosity sufficiently to alter film gauge or profile dimensions, particularly at the lower end of the melt-flow range. In cast film and extrusion coating, the melt should be filtered through 60–80 mesh screen packs, and the extruder should be purged with low-density polyethylene before shutdown to prevent carbonized EVA deposits. Pre-drying is generally not required when moisture is below 0.10%. If storage relative humidity exceeds 60%, drying for 2–4 h at 60–80 °C lowers surface moisture without advancing additive migration.
In blown film operations, grades in this melt-flow band are generally run at blow-up ratios of 2.0:1 to 3.0:1 with a die gap of 1.0–1.5 mm, with frost-line height adjusted to the required optical quality and blocking behaviour. Because vinyl acetate units disrupt polyethylene crystallinity, EVA film is softer and more transparent than an LDPE film of equivalent density, and elongation at break measured by ASTM D882-18 ordinarily increases with vinyl acetate content. Blocking and surface friction are also higher, so slip and antiblocking additives are commonly required. In lamination and sealing layers, EVA 140T/2 is evaluated for lower seal initiation temperature relative to LDPE; seal strength is measured under ASTM F88/F88M-21 with a dwell time of 1 s and must be confirmed on the final film structure. In cast film, the polymer is typically extruded at a die gap of 0.5–1.0 mm and melt temperature of 220–230 °C. Higher melt temperature reduces melt fracture but increases the risk of gels from peroxide residues or additive agglomeration.
Compounding of EVA 140T/2 with azodicarbonamide foaming agents or dicumyl peroxide crosslinking systems is used for foam profiles and crosslinked insulation compounds. For continuous vulcanization, crosslinking temperatures of 170–190 °C are typical, but the peroxide half-life at processing temperature requires thermal mapping because premature scorch can occur in hot screw zones. Carbonate-based acid scavengers or zinc oxide may be included to buffer residual acidity from any acetate decomposition. Amine-based additives should be avoided where the compound is exposed to sustained heat, due to the possibility of deacetylation or colour formation. For foaming formulations, melt strength and crystallization temperature influence cell coalescence. Published cell-structure data for EVA foam often relate density reduction to azodicarbonamide loading, but formulation-specific values for EVA 140T/2 should be developed on production-scale twin-screw or kneader equipment because small changes in melt temperature and pressure profile affect cell size distribution.
On injection molding machines with clamp force from 500–1500 kN for medium-sized parts, EVA 140T/2 can be processed at barrel temperatures of 180–220 °C and mould temperatures of 10–40 °C. The lower crystallization rate of EVA compared with high-density polyethylene extends cooling time and may require reduced injection speeds to avoid surface splay from moisture or volatile additives. Dimensional stability is improved by setting hold pressure to 60–80% of peak injection pressure and by avoiding excessive pack time that distorts the soft segments. Gate blush and flash become more likely when the melt viscosity drops sharply near 225 °C; operators should reduce melt stock temperature before increasing injection speed.
Substitution of EVA 140T/2 for LDPE increases polarity and adhesion to polar substrates, while substitution for EPDM reduces raw-material cost but lowers heat resistance and compression-set resistance. In ASTM D395-18 compression-set testing, EVA copolymers generally show higher set than EPDM at 70 °C and above, so direct replacement in dynamic seals or under-hood heat-exposed components is not recommended without validation. In footwear midsole foams, EVA offers low density and a broad Shore hardness range, but styrenic block copolymers or polyolefin elastomers may outperform EVA in flex-cracking resistance after ultraviolet exposure unless stabilizers are added. Compared with high-vinyl-acetate EVA grades above 25% VA, EVA 140T/2 is expected to be stiffer, more crystalline, and less tacky, which can make it more suitable for profile extrusion but less suitable for oil-resistant elastomeric applications.
| Comparison category | EVA 140T/2 low-to-mid melt-flow range | LDPE | EPDM | POE | Test basis |
|---|---|---|---|---|---|
| Polar adhesion | Higher than LDPE, lower than high-VA EVA | Low | Moderate after formulation | Low without grafting | Peel adhesion; ASTM D903-98 |
| Low-temperature flexibility | Better than LDPE | Moderate | High | High | ASTM D746-20 |
| Compression set at elevated temperature | Higher than EPDM | Not typically rated | Low | Low to moderate | ASTM D395-18 |
| Heat-seal initiation | Lower than LDPE | Higher | Not a film seal layer | Low to moderate | ASTM F88/F88M-21 |
| Thermal stability and acid risk | Narrower than LDPE and POE | Broad | Broad in dry heat | Broad | TGA under N₂; melt pH monitoring |
Regulatory qualification for food-contact uses must be conducted on the final article, not on the raw pellet. EVA copolymers may fall under FDA 21 CFR 177.1350 where components meet extractives limitations, while European food-contact assessment requires compliance with Regulation (EU) No 10/2011 and its overall migration and specific migration limits. The grade may be assessed under REACH and RoHS Directive 2011/65/EU for heavy metals and phthalates. A supplier declaration should list residual vinyl acetate monomer and processing aids. If medical packaging or skin-contact use is intended, ISO 10993-5 and ISO 10993-10 require additional cytotoxicity, sensitisation, and irritation testing. Published compliance data for the specific EVA 140T/2 grade is limited, and qualification batches should be tested under the final end-use conditions rather than inferred from generic EVA regulatory statements.
EVA is thermally less stable than polyethylene because the acetate side group can undergo elimination to form unsaturation and acetic acid. The onset temperature depends on heating rate and stabiliser package. Industrial thermogravimetric data for EVA copolymers often show an initial mass-loss step between 300 °C and 400 °C under inert conditions, but prolonged residence at extrusion temperatures above 230 °C can already generate corrosive acetic acid. For EVA 140T/2, processors should monitor head pressure and melt temperature at the breaker plate rather than relying only on barrel set points. If degradation is suspected, the extruder should be purged with a low-melt-index LDPE or a commercial purging compound, not with water or alcohol, and downstream rolls should be cleaned to remove acidic residue. Storage should be in sealed packaging below 30 °C and out of direct sunlight. Prolonged storage under elevated humidity can increase surface hydrolysis and aggravate pellet blocking. The material should not be blended with acidic fillers or with recycled polyvinyl chloride at melt temperatures where hydrochloric acid and acetic acid can jointly accelerate degradation.
