| HS Code | 921624 |
| Vinyl Acetate Content | 40 wt% |
| Melt Flow Index 190 C 2 16 Kg | 55 g/10min |
| Density | 0.955 g/cm³ |
| Melting Point | 63 °C |
| Vicat Softening Temperature | 40 °C |
| Glass Transition Temperature | -35 °C |
| Tensile Strength | 8 MPa |
| Elongation At Break | 900 % |
| Shore Hardness | 80 Shore A |
| Brittleness Temperature | -60 °C |
As an accredited EVATANE 40-55 EVA Copolymer Resin,Soft & Flexible Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as solid pellets in 25 kg multi-wall paper bags, palletized and shrink-wrapped for safe handling and storage. |
| Container Loading (20′ FCL) | EVATANE 40-55 EVA copolymer resin is loaded in 20' FCL as 25kg bags on pallets, shrink-wrapped, totaling ~20 metric tons. |
| Shipping | EVATANE 40-55 EVA Copolymer Resin ships as non-hazardous solid pellets in moisture-protective bags or bulk containers. Ensure dry, ventilated storage away from heat, ignition sources, and strong oxidizers. Avoid compression or sharp impact to prevent bag damage. Standard dry freight works; keep temperature below 50°C to maintain flexibility and product integrity. |
| Storage | Store EVATANE 40-55 EVA copolymer resin 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. Maintain moderate temperatures, avoiding excessive heat or humidity. Use FIFO rotation; under proper conditions, shelf life is typically 12 months from receipt. |
| Shelf Life | Shelf life is typically 2 years when stored in a cool, dry place away from direct sunlight and moisture. |
Formulating EVATANE 40-55 into hot-melt packaging adhesives requires separating melt viscosity from open-time behaviour. The resin has a melt flow index of 55 g/10 min when measured under ISO 1133-1:2022 at 190 °C/2.16 kg. The vinyl acetate content of approximately 40 wt% reduces crystallinity relative to low-VA grades. This crystallinity reduction delays set speed and extends open time on porous and non-porous substrates. A representative formulation uses 25–40 wt% EVATANE 40-55, 35–50 wt% hydrocarbon or rosin ester tackifier, 5–15 wt% Fischer-Tropsch or paraffin wax, and 0.1–0.5 wt% hindered phenolic antioxidant. Mixing is carried out in a jacketed anchor-agitated mixer at 150–170 °C under nitrogen. Tackifier and wax are added in staged order to avoid viscosity stratification. The molten adhesive is applied from a slot-die or roller coater at 160–180 °C. Processors record apparent viscosity on a Brookfield thermosel according to ASTM D3236-15. Thermal deacetylation becomes detectable above 190 °C. Acetic acid release causes corrosion of application heads, nozzle plugging, and odour in long-residence hot-melt tanks. The processing window is therefore narrow in toll-compounding lines with extended transfer lines. Adhesion to corrugated board and coated paperboard is often checked as 180° T-peel adhesion under ASTM D1876-08. Heat resistance is evaluated by shear adhesion failure temperature under ASTM D4498-07. Published data for this specific resin in food-contact hot-melt adhesives are limited. EVA-based adhesives may be authorised under FDA 21 CFR 175.105 only where end-use conditions and migration limits are satisfied. Final products include case and carton sealing, bookbinding spines, and woodworking edge-banding adhesives.
| Test/Standard | Parameter | Relevance |
|---|---|---|
| ISO 1133-1:2022 | Melt mass-flow rate at 190 °C/2.16 kg | Confirms 55 g/10 min lot-to-lot consistency |
| ASTM D3236-15 | Apparent viscosity at 180 °C | Pump and nozzle sizing |
| ASTM D4498-07 | Shear adhesion failure temperature | Heat resistance of carton closures |
| ASTM D1876-08 | T-peel adhesion | Bond strength on PET and corona-treated film |
| FDA 21 CFR 175.105 | Adhesives for food packaging | Compliance only after migration validation |
Low-smoke zero-halogen cable compounds based on EVATANE 40-55 are compounded on co-rotating twin-screw extruders with a length-to-diameter ratio of 40:1 or 48:1. The high vinyl acetate content contributes to char formation and allows high filler loadings of aluminium trihydroxide and magnesium dihydroxide. A typical starting formulation uses 100 phr EVATANE 40-55, 120–180 phr aluminium trihydroxide, 10–30 phr magnesium dihydroxide, 0.5–2 phr vinyl silane coupling agent, and 0.2–0.8 phr hindered phenolic antioxidant. Filler is metered through a side stuffer after the polymer melt seal to reduce barrel wear. Barrel temperatures are ramped from 100 °C at the feed throat to 170–185 °C at the die. The strand die temperature must not exceed 190 °C. Acetic acid evolution becomes measurable above this threshold and produces pellet porosity and surface defects. Pre-drying at 60–70 °C for 4 h is applied when storage relative humidity exceeds 60%. The compound is crosslinked by electron beam irradiation or silane grafting for jacketing that resists heat deformation. Halogen acid gas release is checked according to IEC 60754-2. Smoke density is measured under IEC 61034-2. Flame spread is assessed under EN 50399. Published data for this specific EVATANE 40-55 filler matrix are limited. Cone calorimeter peak heat release under ISO 5660-1 must therefore be verified lot-to-lot. Final products include single-core low-voltage insulation and sheathing for control cables where low-smoke zero-halogen performance is specified by EN 50525-3-11.
Blending EVATANE 40-55 into paving-grade and roofing-grade bitumen at a dosage of 3–7 wt% modifies the temperature susceptibility of the binder without requiring a vulcanization step. The copolymer is added to a high-shear mixer after the bitumen has been heated to 170–185 °C. Mixing continues for 1–3 h at a tip speed above 15 m/s until a dispersion particle size below 10 µm is observed by fluorescence microscopy. This high-VA grade swells in maltenes more readily than low-VA EVA because the vinyl acetate groups interact with polar asphaltenes. The resulting polymer-modified binder shows an increase in softening point measured by EN 1427 and a controlled reduction in penetration measured by EN 1426. Storage stability is evaluated as the softening-point difference between top and bottom samples after 72 h at 180 °C under EN 13399. Roofing membrane compounds are calendered or extruded into polyester or glass-fibre carriers at thicknesses from 2–5 mm. Low-temperature flexibility is checked by bending at −20 °C or lower according to EN 1109. Oxidative ageing is a known limitation because high-VA sequences can undergo acetic acid elimination and backbone scission during prolonged hot storage. Antioxidant masterbatches are added and storage temperature is kept below 160 °C after manufacture. Final products are polymer-modified bitumen membranes for bridge deck waterproofing, plaza decks, and road overlays governed by EN 14023 and EN 13969.
In masterbatch production, EVATANE 40-55 is metered as a carrier resin at 50–70 wt% into a co-rotating twin-screw extruder with an L/D 44:1 configuration and a side stuffing zone for pigments. The melt flow rate of 55 g/10 min under ISO 1133-1:2022 reduces specific mechanical energy input during wetting of organic pigments and carbon black. A pigment loading of 20–45 wt% is feasible when the carrier has sufficient polar character because the 40 wt% vinyl acetate content improves wetting of polar particle surfaces. A processing aid is used at 0–5 wt% when colour strength gaps are detected. Barrel temperatures are set from 90 °C at the feed zone to 150–165 °C before the strand die. The melt is filtered through a 200–250 µm screen pack and pelletized by a strand water bath. The pellets are then dried to below 0.1% moisture before blending into polyolefin films and moulding compounds. Let-down ratios of 2–4% are typical in polyolefin films. Compliance with REACH Article 33 and RoHS Directive 2011/65/EU Annex II is verified for heavy metals and restricted phthalates. Final products are colour and additive concentrates for household packaging, hygiene films, and injection-moulded containers. A known batch-to-batch variance occurs when the viscosity of recycled carrier streams drifts, so melt flow rate is checked according to ISO 1133-1:2022 on each production lot.
Extrusion coating of aluminium foil and polyester film uses high-VA EVA at coat weights of 10–25 g/m² as a tie layer between polyolefin sealants and polar barrier layers. The resin is processed on a single-screw extruder with L/D 30:1 and a decompression screw, feeding a flat die through a horizontal stretch. Melt temperature is held between 190 °C and 210 °C for short residence times below 10 min. The high vinyl acetate content raises adhesion to aluminium foil and corona-treated polyester but reduces curtain stability at high line speed. For this reason the draw-down ratio is kept below 15:1. Corona treatment of the substrate is set to 40–48 mN/m surface energy before lamination. The coated substrate is laminated immediately through a chilled nip at 15–25 °C and wound under controlled tension. Adhesion is tested by ASTM F88 seal strength and peel testing according to ASTM D903 after 24 h storage. Food-contact compliance falls under FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers and EU Regulation 10/2011 with overall migration tested under EN 1186-1. A processing boundary appears when melt temperature exceeds 210 °C. Edge beading defects and odour are then observed on production coaters. Final products include lidding films, sachets, and pouch structures for dry foods and beverage packaging.
Injection moulding of soft-touch grips based on EVATANE 40-55 imposes narrower melt-temperature control than polyolefin elastomers because of the resin’s heat sensitivity. The resin is injected at a melt temperature of 170–190 °C into a cold mould held at 20–40 °C. Injection speed is set at 20–60 mm/s screw forward velocity. Packing pressure is limited to 20–40 MPa to reduce flash while preventing short shots. The high vinyl acetate content lowers hardness and increases elongation. Hardness is confirmed by ASTM D2240 Shore A. Tensile properties are checked under ASTM D638-14. Mould shrinkage is anisotropic and must be validated across tool inserts. Published single-point data for this specific grade in unfilled injection-moulded articles are limited. The resin is frequently blended with 10–25 wt% polyolefin elastomer or SEBS when lower brittle points are required. Screws with low compression ratios below 2.5:1 and polished chrome plating reduce shear heating and material hold-up. Residual acetic acid smell is controlled by purging with low-MFI polyethylene before shutdown. Compliance for consumer articles is checked under REACH Annex XVII and RoHS Directive 2011/65/EU. Final products are anti-slip inserts for hand tools, appliance feet, bottle cap liners, and flexible closures produced under ISO 9001 process control.
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Ethylene-vinyl acetate copolymer resin designated EVATANE 40-55 is supplied as a soft and flexible EVA grade in the high vinyl acetate range. The grade designation corresponds to a nominal vinyl acetate content of 40 weight percent and a nominal melt flow index of 55 g/10 min when tested at 190 °C under a 2.16 kg load in accordance with ISO 1133-1:2022 Method A, with parallel reporting under ASTM D1238 condition 190/2.16 kg. The acetate group concentration is sufficient to suppress most of the polyethylene crystallinity, producing a resin that approaches rubber-like behaviour and is positioned at the soft and flexible end of the EVA product spectrum. Compared with standard film or injection moulding EVA grades containing 14–28 weight percent vinyl acetate, EVATANE 40-55 exhibits lower tensile strength, higher elongation, lower Shore hardness, and lower thermal softening resistance. The material is used primarily in adhesive compounds, polymer modification, flexible compounding, and carrier resin systems where high tackifier or filler acceptance and low-temperature flexibility are required.
Melt rheology and thermal limits are the first tier of qualification. EVATANE 40-55 has a relatively low melt viscosity at processing temperatures because of its 55 g/10 min melt index, but it also has a narrow high-temperature stability envelope. The resin is suitable for melters and compounders that can control melt temperature below 190 °C; above this threshold, deacetylation of vinyl acetate units may release acetic acid, produce odour, shift colour, create gel particles, and cause viscosity drift. In production equipment, this requires close monitoring of barrel set points, screw speed, and melt pressure rather than reliance on open-air thermal exposure tests.
In ethylene-vinyl acetate copolymers, vinyl acetate units interrupt the linear polyethylene sequence. Each inserted acetate group reduces crystallite thickness and perfection. At 40 weight percent vinyl acetate, the resin no longer exhibits the sharply defined melting peak of low-VA EVA; differential scanning calorimetry under ISO 11357-3:2018 typically records a broad endotherm between 40 °C and 80 °C, with the exact profile dependent on thermal history and cooling rate. The degree of crystalline order is sufficiently low that hardness measured under ISO 868:2003 or ASTM D2240 type A falls within the soft Shore A range. Published industrial data for similar 40 % vinyl acetate copolymers commonly cluster near 50–60 Shore A, but precise incoming inspection must compare the supplier certificate of analysis against the user’s specified acceptance limit.
Mechanical evaluation is performed on compression-moulded or injection-moulded specimens. Tensile properties should be reported under ISO 527-2:2012 using type 5A specimens for flexible plastics, or under ASTM D638-14 type IV where regional equivalence is required. Elongation at break for this high-VA resin is generally above 600 %, with tensile strength and modulus dependent on vinyl acetate content, molecular weight, and crystallinity. The density of high-VA EVA copolymers is generally reported near 0.98–1.00 g/cm³ at 23 °C under ISO 1183-1:2019; the exact value for EVATANE 40-55 must be taken from the certificate of analysis. Softness and polarity are accompanied by reduced barrier properties and higher moisture permeability than low-VA EVA, which must be considered in packaging or sealing applications.
Analytical verification of incoming lots should follow a test matrix that distinguishes the resin from lower-VA or lower-melt-index alternatives.
| Parameter | Standard designation | Reported unit / condition |
|---|---|---|
| Melt flow index | ISO 1133-1:2022 Method A / ASTM D1238 | g/10 min at 190 °C, 2.16 kg |
| Vinyl acetate content | ISO 8985:1998 / supplier FTIR procedure | weight percent |
| Density | ISO 1183-1:2019 / ASTM D792 | g/cm³ at 23 °C |
| Shore A hardness | ISO 868:2003 / ASTM D2240 | dimensionless, 15 s reading |
| Tensile elongation at break | ISO 527-2:2012 type 5A / ASTM D638-14 type IV | percent |
| Peel adhesion of bonded assemblies | ASTM D903 or ASTM D1876 | N/mm or lb/in |
Formulation of hot-melt adhesives with EVATANE 40-55 typically begins with the resin as the base polymer to which tackifier resins, waxes, and antioxidant packages are added. The high melt flow index permits wet-out without excessive energy input, but it also reduces gap-filling and sag resistance. Open time, set time, and adhesive peel strength are adjusted through the ratio of EVA to tackifier. Formulations containing 30–40 weight percent tackifier resin, 20–30 weight percent wax, and an antioxidant system are common starting points, but exact ratios are substrate-specific and must be validated on the target line. Melters are generally operated at 150–180 °C for high-VA EVA systems. Thermal exposure above 190 °C should be limited because deacetylation can release acetic acid and produce odour, colour shift, or viscosity drift. In production-scale hot-melt equipment with heated transfer hoses and slot-die coaters, residence time is controlled by tank volume and throughput; a 2–4 h residence at 170 °C is a commonly used plant limit for high-VA EVA, although validation on the specific melt tank is required.
Compounding of hot-melt adhesives is often completed on twin-screw extruders with barrel profiles between 80 °C and 160 °C, with screw speed tuned to maintain melt temperature below 170 °C at the die. High-shear mixing elements should be limited because frictional heating can drive the melt above the deacetylation threshold. Feed throat temperature control is critical; the soft pellets can agglomerate in the feed zone if the throat is not kept cool. Production trials commonly use chilled water at 10–15 °C on the feed throat to prevent blockage while maintaining barrel zones high enough for dispersion of tackifier resins. Hot-melt adhesive bond performance is substrate-dependent; peel strength is evaluated under ASTM D903 or ASTM D1876 on the specific laminate or substrate. No published value for EVATANE 40-55 alone is sufficient to guarantee bond performance without trial data.
Blends and compounds based on EVATANE 40-55 are produced on twin-screw extruders using the same low-temperature strategy applied to hot-melt compounding. The resin is used as a polymeric flexibilizer and as a carrier resin in filler-containing masterbatch systems because the high vinyl acetate content increases polarity and interaction with inorganic surfaces. The 40 weight percent vinyl acetate content permits higher filler loadings than nonpolar polyethylene carriers can accept without immediate phase separation or loss of cohesion. However, compatibility with polyolefin matrices must be verified; adding EVATANE 40-55 to high-density polyethylene at increasing levels lowers tensile strength and heat deflection resistance, even though elongation and low-temperature flexibility may improve.
In wax compounding, EVATANE 40-55 is blended with paraffin, microcrystalline wax, or Fischer-Tropsch wax to modify viscosity, flexibility, and adhesion for coating and paper-converting applications. The high VA content reduces the crystallinity of the wax phase and shifts the cooling curve toward a longer open time. Extrusion of neat EVATANE 40-55 into flexible tubing, profiles, or sheet requires a screw with low compression ratio and controlled melt temperature. The melt strength is lower than that of an EVA grade with similar vinyl acetate content but lower melt index. Therefore, profile extrusion may require a higher-molecular-weight EVA or a blend if the profile must retain shape during cooling. The low softening point also means that extruded parts made from EVATANE 40-55 are not suitable for continuous service at elevated temperature unless the part is supported or post-cured.
Substitution of a high-vinyl-acetate grade for a semi-crystalline low-VA EVA should be driven by measurable thermal, rheological, and mechanical differences. A lower-VA EVA, such as one containing 18 weight percent or 28 weight percent vinyl acetate, retains a higher melt temperature, higher Shore hardness, higher tensile strength, and superior dimensional stability. EVATANE 40-55 replaces those properties with greater polarity, lower modulus, higher elongation, and improved low-temperature flexibility. When the intended application is a hot-melt adhesive or a flexible compound, the high polar content improves interaction with polar substrates such as wood, paper, polyester film, and polar polymers. When the intended application is a load-bearing structural part or a hot-fill packaging article, the lower thermal resistance of the 40 % VA grade becomes the limiting factor.
The melt index also differentiates EVATANE 40-55 from lower-vinyl-acetate grades. The 55 g/10 min melt flow index results in lower melt viscosity than that of a 25 g/10 min high-VA grade, which improves penetration into porous substrates but reduces gap-filling and sag resistance. For thick laminations or vertical bond lines, a lower melt index alternative may be required even if the vinyl acetate content is similar. Conversely, in low-grammage coating or sprayable hot-melt systems, the lower viscosity of EVATANE 40-55 reduces pump pressure and nozzle plugging, provided the melt temperature is maintained below the deacetylation limit.
The 40 weight percent vinyl acetate content places the resin in a polarity regime where adhesion and compatibility are governed by polar interactions rather than by co-crystallization with polyethylene. High-VA EVA is amorphous enough to accept tackifiers, plasticizers, and fillers without the sharp crystallization transitions that can cause phase separation in lower-VA EVA compounds. This compatibility is measurable through melt clarity, fracture surface analysis, and peel strength after conditioning at low temperature. In flexible assembly applications, the softness of EVATANE 40-55 is useful; however, the resin cannot be treated as a structural thermoplastic. Long-term creep resistance, tensile modulus, and cut resistance are low compared with polyolefins and engineering thermoplastics. The grade should be selected where softness, elongation, and low-temperature flexibility are requirements, not where tensile load bearing or elevated-temperature dimensional stability is required.
Compliance assessment begins with the final article rather than the raw resin alone. EVATANE 40-55 may fall within the scope of FDA 21 CFR 177.1350 when used in certain ethylene-vinyl acetate copolymer applications for food contact, provided migration testing of the finished article meets the relevant extractive limits. Under European Union food-contact regulations, raw resin compliance with Regulation (EU) No 10/2011 annexes must be verified with the supplier’s declaration, and final article migration testing should follow the EN 1186 series. REACH registration obligations under Regulation (EC) No 1907/2006 apply to the supplier; downstream users must confirm that their usage is within the registration dossier and that the product is not intentionally modified in a way that creates a new registrable substance. If the final article is destined for electrical or electronic equipment, RoHS Directive 2011/65/EU restrictions on lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE must be confirmed at the homogeneous material level. EVATANE 40-55 does not contain these as intentional additions, but supplier documentation and analytical screening under IEC 62321 may be required for production release. Pre-drying is not typically required for hot-melt use, but exposure to high humidity may introduce moisture; storage above 30 °C or in direct sunlight should be avoided to prevent agglomeration. For applications where the compound is exposed to amines or strong alkaline media, compatibility testing is required because ester groups in vinyl acetate are susceptible to hydrolysis and stress cracking under aggressive chemical conditions.
