| HS Code | 936249 |
| Property | Value |
| Density | 0.955 g/cm³ |
| Melt Index | 3 g/10 min (190°C/2.16 kg) |
| Vinyl Acetate Content | 28 wt% |
| Melting Point | 71°C |
| Tensile Strength | 10.3 MPa |
| Elongation At Break | 800% |
| Hardness | 85 Shore A |
| Vicat Softening Point | 41°C |
| Brittleness Temperature | -70°C |
| Viscosity | 600 mPa·s (at 140°C) |
As an accredited Elvax 265 EVA Copolymer Resin,Adhesives & Footwear Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Elvax 265 EVA resin, adhesives/footwear grade, comes in 25 kg multi-wall paper bags as free-flowing pellets. |
| Container Loading (20′ FCL) | 20′ FCL loaded with 25 kg bags of Elvax 265 EVA resin, palletized, net weight approx. 16 metric tons. |
| Shipping | Elvax 265 EVA Copolymer Resin ships as non-hazardous solid pellets in 25 kg multiwall bags, palletized and stretch-wrapped for protection. Keep dry and away from excessive heat during transit. Standard truck, sea freight, or containerized shipping is suitable. Ensure proper labeling and clean, covered transport to prevent contamination. |
| Storage | Store Elvax 265 EVA Copolymer Resin in its original, tightly sealed containers in a cool, dry, well-ventilated area. Avoid direct sunlight, heat sources, open flames, and strong oxidizers. Keep away from moisture and high humidity to prevent clumping or degradation. Maintain storage temperature below 30°C; elevated heat may cause softening or fusing. Rotate stock to use oldest material first. |
| Shelf Life | Shelf life is indefinite when stored in a cool, dry area away from sunlight, heat, and moisture, retaining adhesive performance. |
At a melt mass-flow rate of 3.0 g/10 min (ISO 1133-1:2022, 190 °C, 2.16 kg) and vinyl acetate content of 28 wt%, Elvax 265 raises cohesive strength in edge-banding hot melts but narrows the application window on continuous coaters. In production-scale edge banding of medium-density fibreboard, the resin is introduced into the polymer fraction at 20–40 phr, with 40–60 phr of C5/C9 hydrocarbon tackifier having a ring-and-ball softening point of 95–110 °C, and 10–20 phr of Fischer-Tropsch wax. Addition beyond 40 phr may push Brookfield viscosity above 250,000 mPa·s at 180 °C on a No. 27 spindle, causing roller coaters to skip on 0.4 mm polyester edgeband at feed speeds above 15 m/min. Compliance is assessed under DIN EN 204:2016 classification D3 for thermoplastic wood adhesives, with base-resin documentation according to REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU; lead, mercury, hexavalent chromium, PBB, and PBDE are below 1000 ppm, and cadmium is below 100 ppm. Granulate is pre-dried at 60 °C for 2 h when bulk storage RH exceeds 60%, then melt-compounded in a twin-screw extruder with L/D 40–48, barrel profile 120–140 °C, and screw speed 150–250 rpm. Application is carried out on a hot-melt edge bander with pre-melt tank at 180–200 °C, lip or roller applicator at 180–200 °C, and panel feed speed of 12–25 m/min. Terminal goods include PVC-edge-banded MDF cabinet doors, ABS-edge-banded office desktops, and polyester-edge-banded shelving panels.
Spine creep after layflat cycling is governed by melt fracture resistance and chain entanglement density rather than by tackifier softening alone. In perfect-binding formulations, Elvax 265 is compounded at 20–30 phr of total polymer, with 5–15 phr of a higher melt-index EVA having 150–400 g/10 min (ISO 1133-1:2022) to maintain nozzle flow at 160–180 °C, 30–50 phr of rosin ester tackifier with acid number below 20 mg KOH/g, and 10–25 phr of microcrystalline wax. At the upper 30 phr level, spine adhesive viscosity measured by Brookfield thermocell at 170 °C is typically 4,000–7,000 mPa·s, which suits spine stations with gear pump delivery and 0.3–0.7 MPa nip pressure; at machine speeds above 8,000 cycles/h, however, wet-out of uncoated offset stock becomes insufficient unless web preheat is raised to 45–55 °C. Compliance for library-grade binding references ANSI/NISO/LBI Z39.78-2000 for openability, page pull strength, and room-temperature flex resistance, while the resin is accompanied by a REACH declaration and does not require classification as a hazardous mixture under CLP Regulation (EC) No 1272/2008. Production uses a high-shear twin-screw or sigma-blade mixer at 130–150 °C under nitrogen blanket, followed by application through spine and side gluing heads on a perfect binder. Terminal products are perfect-bound trade paperbacks, adhesive-bound catalogs, and durable library hardcover text blocks.
During azodicarbonamide decomposition in crosslinked EVA foam compounds, the polymer melt must maintain elongational viscosity at gas expansion temperatures between 150 °C and 175 °C, a condition met by the high molecular weight and low melt-index of Elvax 265. In midsole formulations, Elvax 265 is used at 30–50 phr of the total polymer, combined with a higher-VA EVA grade at 30–50 phr, polyolefin elastomer at 10–20 phr, zinc oxide at 1.0–2.0 phr, stearic acid at 0.5–1.0 phr, azodicarbonamide blowing agent at 1.5–3.0 phr, and dicumyl peroxide at 0.5–1.0 phr. The decomposition exotherm of azodicarbonamide and the peroxide curing exotherm impose a narrow molding window: lowering press temperature below 155 °C leaves unreacted peroxide and collapses the foam after demolding, while operation above 175 °C generates internal gas pressure exceeding 0.6 MPa, causing split cells and a skin-to-core density differential greater than 0.03 g/cm³. Compliance testing uses ISO 1856:2018 for compression set, ISO 34-1:2022 for tear strength, and ISO 868:2003 for Shore hardness; materials are documented under REACH Regulation (EC) No 1907/2006 and heavy metals below RoHS limits. Production compounding is performed in a Banbury internal mixer at 110–125 °C for 8–12 min, then a two-roll mill at 80–95 °C with 0.5–1.0 mm nip; sheets are cut and compression-molded in multi-cavity presses at 160–170 °C and 15–20 MPa for 5–8 min, followed by cold demolding at 25–35 °C. Terminal products are compression-molded running-shoe midsoles, molded EVA sandals, and cushioned insoles.
Solid injection-molded unit sole compounds exhibit a nonlinear increase in injection pressure when Elvax 265 is substituted for a 150 g/10 min grade at equal vinyl acetate content. A practical formulation contains 20–35 phr Elvax 265, 15–30 phr EVA with melt index 150–400 g/10 min, 10–20 phr EPDM or SBR elastomer, 10–20 phr calcium carbonate filler treated with stearic acid, 2–5 phr zinc oxide, 0.5–1.5 phr peroxide or peroxide-sulfur coagent system, and 0.5–1.0 phr antioxidant. On a 300-tonne injection molding machine with screw L/D 20–24 and compression ratio 2.5–3.0:1, melt temperature 170–190 °C, mold temperature 25–35 °C, and injection pressure 9–14 MPa, the low melt index of Elvax 265 raises injection pressure by 1.5–2.5 MPa relative to higher melt-index grades; cycle times remain acceptable at 60–90 s for sole thickness 8–15 mm. Compliance for outsoles references ISO 20871:2018 for abrasion resistance, ISO 17707:2005 for flex cracking, ISO 868:2003 for hardness, and REACH Regulation (EC) No 1907/2006; slip resistance may be tested under SATRA TM144. Published data for narrow-gate cavities with wall thickness below 4 mm using Elvax 265 is limited; production-scale validation on thin-wall runners is required before replacing the entire polymer fraction. Production begins with dry-blending in a high-speed mixer at 80–100 °C, melt compounding in an internal mixer, pelletizing, and injection molding. Terminal products are injection-molded unit soles for casual shoes, work boots, and low-density rigid outsoles for children’s footwear.
Unlike packaging hot-melts that tolerate low-temperature viscosity below 2,000 mPa·s, profile-wrapping adhesives for kitchen furniture and window profiles demand high cohesive strength at service temperatures above 70 °C. Elvax 265 is added at 15–25 phr of the polymer fraction with 10–20 phr of higher melt-index EVA, 30–45 phr of hydrogenated hydrocarbon tackifier with softening point 105–120 °C, and 10–20 phr of paraffin wax; the resulting Brookfield viscosity at 190 °C is 30,000–60,000 mPa·s, allowing slot-nozzle application on profile wrapping lines running at 15–40 m/min. Overheating above 200 °C for more than 6 h accelerates deacetylation; production-scale equipment shows darkening of the melt reservoir and formation of acetic acid that corrodes brass nozzles, so thermal stabilizers are added at 0.3–0.8 phr and pre-melt temperature is controlled at 180–195 °C. Compliance for these assembly adhesives is assessed under DIN EN 204:2016 for wood-based substrates, REACH Regulation (EC) No 1907/2006, and RoHS Directive 2011/65/EU; surface-bond performance can be evaluated by ISO 4587:2003 lap-shear strength. Production uses batch or continuous hot-melt mixing at 140–160 °C, followed by slot-nozzle application onto primed PVC, ABS, or acrylic film. Terminal products are profile-wrapped MDF cabinet frames, paper-wrapped decorative mouldings, and PVC-wrapped window lineal components.
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Elvax 265 EVA Copolymer Resin, Adhesives & Footwear Grade is an ethylene-vinyl acetate copolymer containing 28% by mass vinyl acetate and exhibiting a melt-mass flow rate of 3.0 g/10 min when tested at 190°C and 2.16 kg in accordance with ISO 1133-1:2022. Nominal density is 0.951 g/cm3 per ASTM D1505-18, and the peak melting endotherm is typically reported near 73°C by differential scanning calorimetry under ASTM D3418-12. Vinyl acetate content can be confirmed by ASTM D5594 Fourier-transform infrared spectroscopy. The grade is supplied as pellets and is used in hot-melt adhesive compounding and footwear foam processing where low melt flow, relative to conventional adhesive-grade EVA, supports higher cohesive strength and heat resistance. Within the 28% vinyl acetate Elvax series, Elvax 265 represents the low-melt-flow end; adjacent grades Elvax 260, Elvax 250, Elvax 240, Elvax 220, and Elvax 210 provide stepwise reductions in melt viscosity without changing vinyl acetate polarity.
Melt-mass flow rate is the primary differentiation. Under ISO 1133-1:2022 conditions, the 28% vinyl acetate series spans from Elvax 265 at 3.0 g/10 min to Elvax 210 at 400 g/10 min. Lower melt flow in Elvax 265 corresponds to higher melt elasticity and higher extensional viscosity, which can increase green strength, creep resistance, and upper service temperature in compounded adhesives. The same low melt flow reduces melt wet-out on rough or fibrous surfaces and increases pump pressure in melt-delivery systems. The table below summarizes supplier-published nominal data for the 28% vinyl acetate Elvax series; these values are not purchase specifications and must be confirmed against lot-specific certificates of analysis.
| Grade | Vinyl acetate content | Melt-mass flow rate | Nominal density | Typical compounding implication |
| Elvax 265 | 28% | 3.0 g/10 min | 0.951 g/cm3 | Highest melt viscosity; high cohesive strength |
| Elvax 260 | 28% | 6.0 g/10 min | 0.951 g/cm3 | Lower viscosity; easier mixing |
| Elvax 250 | 28% | 25 g/10 min | 0.951 g/cm3 | Balanced flow and mechanical strength |
| Elvax 240 | 28% | 43 g/10 min | 0.951 g/cm3 | Improved wet-out on porous substrates |
| Elvax 220 | 28% | 150 g/10 min | 0.951 g/cm3 | Low-viscosity adhesive compounding |
| Elvax 210 | 28% | 400 g/10 min | 0.951 g/cm3 | Maximum substrate penetration; low cohesive strength |
Rheological differences in filled or tackified compounds cannot be predicted from melt-mass flow rate alone. Rotational rheometry under ISO 3219 and capillary rheometry at 180°C are used to determine shear-rate-dependent viscosity. In high-tackifier formulations, differential scanning calorimetry under ASTM D3418-12 can detect phase separation exotherms during cooling; film clarity after pressing at 180°C and cloud point by controlled cooling per ASTM D2500 are practical compatibility screens. Published data for this specific configuration is limited, and compound viscosity targets should be developed on the intended production line.
In hot-melt adhesive compounding, Elvax 265 is blended with rosin ester or hydrogenated hydrocarbon tackifiers at 150°C to 170°C in sigma-blade mixers or high-shear twin-screw extruders. Motor-torque monitoring is essential because the low melt-flow grade increases batch viscosity during tackifier letdown. Application through hot-melt slot-die coaters, roller coaters, or bead extrusion lines may require melt temperatures of 165°C to 180°C to maintain viscosity below equipment-specific limits. Roller-coating lines with a viscosity limit of 5,000 mPa·s measured by ASTM D1084 may not accept Elvax 265-rich compounds at 160°C; reformulation with Elvax 250 or Elvax 260 is a common corrective step. Green strength of adhesive films can be measured by ASTM D638-14; T-peel adhesion to corona-treated polyethylene can be evaluated by ASTM D1876; heat resistance under load can be ranked by shear adhesion failure temperature per ASTM D4498; and loop tack can be measured by ASTM D6195. End users should establish targets on the intended substrate because published data for this specific configuration is limited.
For packaging hot melts, Elvax 265 is used when high cohesion is needed for high-speed case and carton sealing on lines with compressed air valve guns. Low melt flow can increase stringing if melt temperature is too low; antistringing behavior is improved by raising melt temperature to 175°C and using a nozzle with 0.4 mm to 0.8 mm orifice. Open time can be evaluated by applying a 2 mm bead to kraft paper and measuring pressure-sensitive bond formation using a temperature-controlled tensile tester; published data for this specific configuration is limited.
In 40:1 L/D co-rotating twin-screw extrusion, Elvax 265 compounds are frequently torque-limited rather than extruder-limited. Feed-zone temperatures are held below 120°C to prevent pellet bridging; barrel temperatures from feed to die are typically 120°C, 140°C, 160°C, and 170°C, with melt temperature monitored at the die entry. If melt temperature falls below 150°C, pump inlet pressure rises and die-lip streaking can occur. If melt temperature exceeds 200°C, deacetylation becomes measurable by thermogravimetric analysis under ASTM E1131, and liberated acetic acid can corrode downstream metal components. Vacuum devolatilization with a vacuum pump below 40 mbar absolute is used to remove moisture and low-molecular-weight volatiles before the die. Screen changers with 100 μm mesh are placed before the gear pump to protect slot-die lips; pressure drop across the screen pack should be recorded at the start of each batch to detect gel formation or filler agglomeration. Incoming melt-mass flow rate should be checked per ISO 1133-1:2022 and vinyl acetate content by ASTM D5594 to limit batch-to-batch variation. A commonly observed production failure mode is vent plugging caused by foaming when moisture content in tackifier or filler exceeds 0.1%; this appears as vacuum fluctuation and throughput loss.
Bookbinding and woodworking edge-banding lines place different demands on Elvax 265. In bookbinding, high melt viscosity reduces penetration into uncoated paper, which maintains an adhesive film on the spine and improves page-pull strength; page-pull durability can be assessed using constant-rate-of-elongation tests or ANSI/NISO/LBI Z39.44 for hinged bindings. In edge banding, low melt flow improves initial hot tack and reduces adhesive bleed under heated presses, but line speed may be restricted because of slower wet-out on high-density cellulosic tapes. Application systems typically use roller or slot-die coaters at 170°C to 180°C with melt viscosity in the 5,000 mPa·s to 20,000 mPa·s range. Hot tack is measured on a temperature-controlled tensile tester according to internal procedures; published data for this specific configuration is limited.
Footwear midsole and outsole foam compounds based on Elvax 265 are processed on two-roll mills at 100°C to 110°C or in internal mixers with drop temperatures below 120°C. A typical expansion system contains dicumyl peroxide, azodicarbonamide, zinc oxide, zinc stearate, and calcium carbonate; the low melt index of Elvax 265 contributes to green compound viscosity and controls cell wall strength during gas expansion. Curing and foaming are commonly carried out in compression molds at 155°C to 170°C for 15 min to 20 min, followed by cooling and demolding. Foam properties are tested by ASTM D2240-15 for hardness, ASTM D792-20 for density, ASTM D638-14 for tensile strength and elongation, ASTM D624-00(2020) for tear strength, ASTM D395-16e1 for compression set, and ASTM D2632-15 for rebound resilience. Because crosslink density and foam density are formulation-dependent, published data for this specific configuration is limited; production trials are required to establish lot-specific mechanical targets.
Two-stage mixing is used to prevent premature crosslinking. In the first stage, Elvax 265, fillers, and processing aids are compounded without peroxide or blowing agent at 100°C to 120°C. In the second stage, dicumyl peroxide and azodicarbonamide are added on a cooled two-roll mill below 90°C to prevent scorch. Moving die rheometer testing per ASTM D5289 is used to establish cure times; dicumyl peroxide addition levels of 0.5 phr to 1.2 phr shift crosslink density and compression set. Blowing agent decomposition gas yield can be measured by thermogravimetric analysis under ASTM E1131, and foaming ratio is calculated from density before and after expansion. Processing windows are narrow because premature crosslinking during the second mixing stage can increase viscosity and reduce cell uniformity. On production-scale two-roll mills, batch-to-batch variation in filler moisture above 0.1% can produce pinhole defects in the expanded sheet.
Elvax 265 is not typically used as the sole EVA resin in complex injection-molded midsole cavities. At 3.0 g/10 min, melt viscosity can limit flow length and increase injection pressure, leading to short shots or burn marks in high-temperature, high-shear fill stages. Formulators often blend Elvax 265 with Elvax 250 or Elvax 260 to shift compound melt flow toward 10 g/10 min to 25 g/10 min while retaining part of the mechanical strength of the low-melt-index component. Spiral-flow testing using an injection mold with a 2 mm spiral cavity and melt temperatures of 170°C to 180°C can rank compounds; injection pressure should be measured by in-mold pressure transducers or machine hydraulic pressure readings. Clamp force requirements are proportional to projected cavity area, and low-melt-index-rich compounds may require higher holding pressure to avoid sink marks. Published data for this specific configuration is limited to machine-specific evaluations, and tooling design should be validated by short-shot studies across the intended processing window.
For lower-polarity or higher-crystallinity requirements, Elvax 265 is not directly interchangeable with 25% vinyl acetate grades such as Elvax 350 or 18% vinyl acetate grades such as Elvax 450. Lower vinyl acetate content reduces polar interaction, raises crystalline melting character, and may improve chemical resistance but weakens adhesion to polar substrates such as leather, polyvinyl chloride, or polyurethane. Higher vinyl acetate content grades, such as Elvax 40W at 40% vinyl acetate, offer lower melt viscosity and greater compatibility with waxes and plasticizers, but typically lower heat resistance and tensile strength. Selection of Elvax 265 therefore represents a balance among melt flow, cohesive strength, and polar adhesion in adhesive and footwear compounds. Direct comparison across grades should be based on lot-specific certificates of analysis and the application-specific standards cited in the relevant sections above.
Food-contact status of compounded Elvax 265 is not automatically conferred by resin grade; end compounds must be evaluated under FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers or regional regulations such as EU 10/2011. REACH registration status should be confirmed for the specific product volume and import region. Unfilled resin is typically assessed for RoHS restricted substances using IEC 62321 methods, but additives and pigments may alter status. Storage should be in dry, ventilated conditions at 25°C to 35°C and relative humidity below 60%. If pellet surface moisture exceeds 0.1%, pre-drying at 60°C for 2 h to 4 h may be required. Avoid combining Elvax 265 with amine-based heat stabilizers in high-shear processing; condensation reactions with vinyl acetate degradation products can cause yellowing and viscosity drift. Avoid low-molecular-weight ketones in liquid adhesive formulations, as they may induce phase separation or viscosity instability. The following compliance checks apply to typical commercial use.
| Domain | Standard or regulation | Assessment point |
| Food contact | FDA 21 CFR 177.1350 | Final compound migration testing |
| EU food contact | EU 10/2011 | Overall migration and specific migration limits |
| RoHS | IEC 62321 | Supplier declaration and analytical screening |
| REACH | EC 1907/2006 | Registration confirmation and SVHC content |
