| HS Code | 279573 |
| Vinyl Acetate Content | 28% |
| Melt Index | 400 g/10 min |
| Density | 0.953 g/cm³ |
| Tensile Strength | 4.8 MPa |
| Elongation At Break | 800% |
| Hardness Shore A | 52 |
| Ring And Ball Softening Point | 103 °C |
| Vicat Softening Point | 45 °C |
| Melting Point | 76 °C |
| Glass Transition Temperature | -38 °C |
| Refractive Index | 1.486 |
| Brittleness Temperature | -70 °C |
As an accredited Elvax 220W EVA Copolymer Resin,Adhesive Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Elvax 220W EVA copolymer resin, adhesive grade, supplied as free-flowing pellets in 25 kg multiwall paper bags. |
| Container Loading (20′ FCL) | 20ft FCL of Elvax 220W EVA resin, adhesive grade, palletized, secured in containers for safe transport. |
| Shipping | Elvax 220W EVA copolymer resin is shipped as solid pellets in moisture-resistant bags or drums. Keep dry, away from excessive heat and direct sunlight. No hazardous goods classification; standard freight or truck transport is suitable. Avoid compression and ensure secure stacking to prevent bag damage during transit. |
| Storage | Store Elvax 220W EVA copolymer resin in a cool, dry area away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture absorption, which can affect adhesive performance. Avoid stacking with heavy materials. Use within recommended shelf life, typically one year, under proper conditions. |
| Shelf Life | Store in a cool, dry area away from heat and sunlight; typical shelf life is two years from date of manufacture. |
In high-speed corrugated packaging, Elvax 220W is selected for case and carton sealing hot melts because its nominal 28 wt% vinyl acetate comonomer content and melt flow rate of 150 g/10 min under ASTM D1238-23 at 190 °C with a 2.16 kg load produce a comparatively narrow compounded viscosity window. Within this downstream sector, the resin is compounded at 22 wt% to 32 wt% with a rosin ester or C5/C9 hydrocarbon tackifier at 35 wt% to 48 wt%, a Fischer-Tropsch or paraffin wax at 12 wt% to 20 wt%, and a hindered phenolic antioxidant at 0.3 wt% to 1.0 wt%. Compounding is performed in a jacketed horizontal sigma-blade mixer at 135 °C to 165 °C with rotor speeds from 30 rpm to 60 rpm; the melt is discharged through a 125 µm screen pack before transfer to the application system. On the packaging line, the adhesive moves through a heated hose held at 155 °C to 170 °C and is delivered by gear pump through a slot nozzle under 0.15 MPa to 0.8 MPa compression. Open time is controlled between 1.5 s and 4.0 s, and set time from 0.8 s to 2.5 s on corrugated board. Terminal products include regular slotted containers, wrap-around cases, and carton closures for food and beverage distribution. Compliance is governed by FDA 21 CFR 175.105 for food-contact adhesives, EU Regulation (EC) No 1935/2004 for food contact materials, and REACH Regulation (EC) No 1907/2006 for substance registration. A processing boundary is observed in unblanketed holding tanks: at melt temperatures above 185 °C for periods exceeding 6 h, surface skinning and viscosity drift become measurable, and 316L stainless steel with nitrogen blanketing is specified to maintain stable application viscosity. Published data for high-speed nozzle char accumulation in corrugated plants with intermittent line stops indicate that filter replacement intervals shorten when tank temperature control exceeds a ±5 °C band; precise line-specific values are established during commissioning because heat history differs across case sealer configurations.
A perfect-bound book adhesive containing Elvax 220W at 25 wt% to 35 wt% is compounded with a rosin ester tackifier at 30 wt% to 45 wt%, a Fischer-Tropsch wax at 12 wt% to 20 wt%, and an antioxidant package at 0.5 wt% to 1.0 wt%. The resin is processed in a twin-screw extruder with an L/D ratio of 40:1 and barrel temperatures from 100 °C to 150 °C, then transferred to a heated coating wheel or slot nozzle at 170 °C to 185 °C. In perfect binding, the book block spine is first milled and notched, after which a two-pass adhesive application is used: a low-viscosity primer layer penetrates the paper fiber matrix, and a cap layer forms the flexible spine bridge. Nipping pressure at the cover station is maintained between 0.3 MPa and 0.6 MPa, with dwell time from 5 s to 12 s. Terminal products include softcover books, high-page-count catalogs, and commercial notebooks. Compliance in durable library binding is tested under ANSI/NISO/LBI Z39.78-2000 for page flex and pull strength, while adhesive bonding is characterized by ASTM D1876-08 T-peel on coated text stock. Cold-crack resistance is relevant for distribution in cold climates; formulated EVA adhesive is tested for flexibility at -20 °C using ASTM D790 flexural modulus after conditioning. An operational limitation is that filler addition beyond 5 wt% calcium carbonate raises melt viscosity non-linearly and reduces paper wetting on coated stocks; filler-modified spine adhesives are therefore excluded from standard bookbinding formulas unless matte visual requirements justify pilot-scale validation.
In corrugated board wax coating, Elvax 220W is introduced into paraffin at 120 °C to 135 °C and dispersed with a high-shear mixer operating at 1,500 rpm to 3,000 rpm for 30 min to 45 min. The addition level is kept between 3 wt% and 9 wt% of the total wax compound; below 3 wt%, measurable improvement in gloss retention and scuff resistance is not consistent, while above 9 wt%, the melt viscosity at 120 °C rises sharply and may exceed the operating range of curtain coaters. The wax compound is applied to corrugated board by cascade or curtain coater at line speeds from 60 m/min to 150 m/min, followed by forced-air cooling. Terminal products are wax-coated produce boxes, meat and seafood containers, and wet-service corrugated trays. Compliance for food-contact paper and paperboard components is addressed under FDA 21 CFR 176.170 and 21 CFR 176.180, with REACH registration documentation maintained for the compounded wax. A process boundary is that moisture introduced on recycled corrugated substrate can generate steam blisters during wax application; substrate moisture content is maintained below 8 wt% before coating. Published data for viscosity drift in oxidized paraffin systems containing EVA at the upper addition limit is limited, so pilot-scale viscosity curves are generated before line qualification.
| Application | Standard or regulation | Test method | Measured parameter |
|---|---|---|---|
| Case and carton sealing | FDA 21 CFR 175.105 | ASTM D3236-15 | Hot-melt viscosity at 175 °C |
| Bookbinding | ANSI/NISO/LBI Z39.78-2000 | ASTM D1876-08 | T-peel strength on coated text stock |
| Wax coating | FDA 21 CFR 176.170 | ASTM D3236-15 | Melt viscosity of paraffin/EVA blend at 120 °C |
| Automotive lamination | VDA 278 | SAE J1756 | VOC/FOG emission values |
| Edge banding | REACH Annex XVII | ASTM D3236-15 | Viscosity at 200 °C |
| Footwear and foam | REACH Regulation (EC) No 1907/2006 | ISO 11339:2019 | T-peel at 180° peel angle |
Automotive headliner and door panel lamination requires an olefinic hot melt that exhibits low volatile emission under VDA 278 thermal desorption and low fogging under SAE J1756. Elvax 220W is compounded at 18 wt% to 28 wt% with a hydrogenated hydrocarbon tackifier at 35 wt% to 50 wt%, a microcrystalline wax at 10 wt% to 18 wt%, and a phosphite/phenolic antioxidant blend at 0.5 wt% to 1.0 wt%. The manufacturing process uses a 200 kg drum unloader with a heated platen and gear pump, moving the melt through a 15 mm heated hose to a slot-die coater at 150 °C to 170 °C. The molten film is applied between a polyester nonwoven or knit fabric and a polyurethane or polyether foam substrate, with nip pressure from 0.1 MPa to 0.3 MPa and line speed up to 30 m/min. Terminal products include headliner trilaminates, door panel inserts, and wheel arch acoustic insulators. Compliance for cabin air quality is verified under VDA 278 for VOC and FOG values, VDA 270 for odor rating, and REACH Annex XVII restricted substances. An operational boundary is that resin pellets exposed to relative humidity above 60% require pre-drying at 60 °C for 4 h to 6 h before compounding; otherwise micro-voids develop in the adhesive film. At melt temperatures exceeding 190 °C in unvented equipment, acetic acid release accelerates, and the melt path should use 316L stainless steel rather than copper-based alloys to limit catalytic degradation.
On edge banding machines running at 25 m/min to 60 m/min, the hot melt is applied through a heated slot nozzle at 180 °C to 200 °C onto a narrow edge band of PVC, ABS, or melamine-faced MDF. Elvax 220W is included at 12 wt% to 20 wt% as a low-viscosity modifier in a formulation otherwise based on a higher-molecular-weight EVA or APAO matrix, with tackifier contents from 30 wt% to 45 wt% and wax contents from 10 wt% to 20 wt%. The 28 wt% vinyl acetate comonomer content reduces the receding contact angle on melamine-faced MDF relative to lower-VA grades, although the specific wetting increment depends on edge band surface energy and release additives. Panel preheat between 35 °C and 50 °C is used to extend open time, and pressure rollers apply 0.2 MPa to 0.4 MPa to consolidate the band to the panel. Terminal products are office desking, cabinetry, and ready-to-assemble furniture panels. Compliance in the European furniture sector references REACH Annex XVII, and for office furniture, emission testing under ANSI/BIFMA M7.1 is applied to the finished assembly. A process boundary is that increasing Elvax 220W beyond 20 wt% lowers melt viscosity below the minimum required for vertical edge retention on high-pressure laminate edges, causing adhesive drip on reversing roller coaters. Published data for this specific edge banding configuration is limited, so a rheological window is established per line with a Brookfield thermosel at 200 °C before high-speed qualification.
Foam-to-fabric assembly lines use Elvax 220W at 18 wt% to 25 wt% in a hot-melt formulation containing rosin ester tackifier and paraffin wax to produce a sprayable adhesive with Brookfield viscosity from 2,000 mPa·s to 5,000 mPa·s at 170 °C. The adhesive is applied by automated swirl spray through heated hoses at 160 °C to 175 °C, with open time of 5 s to 10 s before foam-to-fabric or foam-to-foam assembly under 0.1 MPa to 0.3 MPa pressure. Terminal products include shoe insoles, comfort foam laminates, and mattress foam subassemblies, where the EVA-containing adhesive contributes to adhesion on polyester foam and textile linings. Compliance for restricted substances is managed under REACH Regulation (EC) No 1907/2006 and, where products enter California, California Proposition 65 chemical listings. A limitation is that substrates containing high levels of external lubricants or release agents can reduce peel adhesion; bond validation on production fabric is performed using ISO 11339:2019 T-peel at 180° peel angle. Published data for this specific formulation configuration is limited, so pre-production peel tests are required when lot-to-lot foam surface tension varies by more than 2 mN/m.
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Elvax 220W is an ethylene-vinyl acetate copolymer resin supplied as an adhesive-grade pellet for hot-melt adhesive compounding, wax-blend modification, and sealant production. The polymer contains a vinyl acetate comonomer content of 28 wt% and exhibits a melt mass-flow rate of 150 g/10 min at 190 °C under a 2.16 kg load, determined by ISO 1133-1:2022 or ASTM D1238-20. Density is approximately 0.950 g/cm³ at 23 °C under ASTM D1505-18. These values are typical lot averages and do not supersede the certificate of analysis for a given production batch. Within the same vinyl acetate content class, the 220W grade sits between the higher-melt-index 210 and the lower-melt-index 240W and 250 grades, providing a specific viscosity position for adhesive formulators.
The melt mass-flow rate of 150 g/10 min corresponds to a low-viscosity melt that can be compounded in hot-melt equipment without excessive shear heating. Under production-scale conditions, decreasing melt index from 150 g/10 min to 43 g/10 min increases gear-pump discharge pressure by a system-dependent amount; processors monitor this as a function of incoming pellet lot and tackifier loading. Batch-to-batch variation in resin melt index should be checked by ISO 1133-1:2022, because a drift of 10–15% in melt mass-flow rate can shift coat-weight uniformity in slot-die coating lines. For porous substrates such as corrugated board, the high fluidity of Elvax 220W permits penetration and fibre-tearing bonds at lower application temperatures than extrusion-grade EVA with melt indices below 25 g/10 min.
| Property | Value | Test method |
|---|---|---|
| Vinyl acetate content | 28 wt% | Manufacturer internal method; lot certificate governs |
| Melt mass-flow rate | 150 g/10 min | ISO 1133-1:2022 / ASTM D1238-20 at 190 °C, 2.16 kg |
| Density | 0.950 g/cm³ | ASTM D1505-18 at 23 °C |
| Melting peak temperature by DSC | 73 °C | ASTM D3418-15 at 10 °C/min, second heat |
Dynamic viscosity for filled hot-melt formulations based on this resin is typically characterized by rotational rheometry under ASTM D4440-15 or capillary rheometry under ISO 11443:2021. In concentrated hydrocarbon tackifier systems, compatibility is assessed by glass transition mixing rules, haze development, and hot-stage microscopy. Published data for this specific resin in all tackifier systems is limited; lab-scale T-peel testing under ASTM D1876-08(2015) on the target substrate remains necessary. Addition of paraffin wax reduces viscosity and extends open time up to a system-dependent threshold, beyond which wax bloom and phase separation can occur. Ratios above 30 phr wax are associated in industrial practice with surface bloom and reduced high-temperature peel strength, but the exact threshold depends on wax melting point and oil content.
Two-stage mixing sequences are used when wax content exceeds 15 wt%: EVA and tackifier are blended first at 150–170 °C, followed by wax addition to avoid localised viscosity collapse. In high-shear rotor-stator mixers, overmixing at tip speeds above 10 m/s raises melt temperature and can shear-degrade high-MFR EVA, producing low-molecular-weight fragments that reduce peel strength. Batch logs should record torque, melt temperature, and final melt mass-flow rate. Inline filtration with 100–250 µm stainless mesh removes gel particles and char from aged lines; filter pressure increase above 1.0 MPa indicates plugging and should trigger line inspection.
In high-tackifier systems containing hydrocarbon, rosin ester, or terpene phenolic resins, the 28 wt% vinyl acetate content provides polar attraction to paper, wood, aluminium, polyester film, and coated board surfaces while retaining compatibility with aliphatic tackifiers. Rosin esters generally yield lower molten colour and higher specific adhesion; hydrocarbon resins may provide lower formulation cost and improved thermal stability; terpene phenolics raise heat resistance. Formulators frequently pre-blend the EVA with tackifier at 30–45 wt% and wax at 10–25 wt%, then evaluate viscosity, open time, and adhesion. The high melt index of Elvax 220W permits higher tackifier loading without exceeding the viscosity limits of standard hot-melt applicators, but cohesive strength is lower than that of grades with melt indices below 50 g/10 min. Antioxidant loading should be adjusted when reprocessed regrind exceeds 10 wt%, because repeated heat history can consume stabiliser and accelerate colour shift.
Ethylene-vinyl acetate copolymers undergo deacetylation when held above 200 °C for extended periods, releasing acetic acid that can corrode downstream equipment and alter tackifier acid numbers. Processing on vented twin-screw extruders with L/D ratios of 30:1 to 44:1 should maintain barrel set points between 120 °C and 180 °C, with the die not exceeding 190 °C. Residence time in a hot-melt reservoir should be kept as short as practical; open reservoirs held above 180 °C for more than 6 h have shown upward drift in melt index and darkening of rosin-ester formulations. Oxidative chain scission is indicated by an increase in melt mass-flow rate, reduction in peel strength, and a rise in acid number of aged adhesive. Nitrogen blanketing or vacuum venting reduces oxygen ingress in continuous lines. Batch mixers with slow rotor speeds below 50 rpm are preferred for high-tackifier formulations to limit shear heating, while gear pumps should be sized to avoid recirculation stagnation zones. Contact surfaces should be stainless steel; copper and brass fittings are discouraged because trace copper ions can catalyse polymer degradation at melt temperatures. If surface moisture is present after storage above 60% relative humidity, drying at 50–60 °C in a desiccant dryer for 2–4 h is common practice.
Infrared thermography of slot dies has shown that edge zones can run 10–20 °C hotter than centre zones; this variation affects adhesion uniformity. Die heaters should be zoned and controlled to within ±3 °C. Melt pumps with fixed displacement require viscosity compensation; when resin MFR shifts, coat-weight feedback from a beta gauge or optical thickness sensor can adjust pump speed. The same feedback loop is used on extrusion laminating lines to hold coat weight within ±2 g/m² during rapid changes in line speed.
Installations considering substitution of an 18 wt% VA grade should anticipate a sharp change in substrate-specific peel strength on polar surfaces. EVA grades with lower vinyl acetate content generally require higher application temperatures and show weaker adhesion to aluminium, polyester, and coated paper; Elvax 220W provides an intermediate polarity that can improve fibre tear on corrugated board and reduce delamination on polypropylene film when surface treatment is maintained. Conversely, replacing a 40 wt% VA grade with Elvax 220W lowers low-temperature flexibility and may reduce adhesion to untreated polypropylene. In high-speed packaging lines, the lower melt viscosity relative to Elvax 240W supports thinner adhesive films, shorter open times, and reduced energy input in slot-die coating, but final cohesive strength decreases as measured by tensile lap shear under ASTM D3163-01(2014). Processors running at 150–300 m/min have reported that Elvax 220W allows application temperatures of 160–170 °C where lower-MFR grades require 180–190 °C, but this depends on tackifier melt point, substrate heat capacity, and line configuration. Published data for all machine configurations is limited; pilot-line trials are required before substitution.
Grades with the same 28 wt% vinyl acetate content differ mainly by melt index. Elvax 220W provides lower viscosity than Elvax 240W and greater cohesive strength than Elvax 210, placing it in the middle of the adhesive-grade fluidity range. Wax modification for scuff-resistant packaging uses Elvax 220W where the lower viscosity of Elvax 210 produces insufficient film thickness in discontinuous pail or drum applicators. In remoistenable edge-banding adhesives, the resin is used at 20–35 wt%; in case sealing, the typical addition is 30–40 wt%.
Regulatory verification for adhesive-grade EVA is not a single declaration; the suitability of Elvax 220W for food-contact applications depends on the finished adhesive layer thickness, substrate barrier, and migration testing. Under 21 CFR 175.105, adhesives may be used in food packaging if separated by a functional barrier or if the quantity transferred is not detectable. For repeated-contact articles, 21 CFR 177.1350 addresses ethylene-vinyl acetate copolymers, but specific migration limits for vinyl acetate and trace monomers must be confirmed on the final article. Under EU Regulation 10/2011, compliance requires evaluation of overall migration and specific migration of vinyl acetate using the appropriate food simulants and time/temperature conditions. REACH registration applies to the substance as supplied; downstream article obligations remain with the converter. Adhesive manufacturers should obtain lot-specific certificates and conduct NIAS screening when the adhesive is not separated from food by a functional barrier. Published data for complete migration behaviour of this specific resin across all packaging constructions is limited.
| Standard or regulation | Scope | Verification boundary |
|---|---|---|
| 21 CFR 175.105 | Adhesives for food packaging | Functional barrier or no detectable migration; end-use test |
| 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers in food-contact articles | Specific migration of vinyl acetate; lot certification |
| EU Regulation 10/2011 | Plastic materials in contact with food | Overall migration and specific migration with simulants |
| REACH 1907/2006 | Substance registration and SVHC duties | Safety data sheet and registration number |
| RoHS 2011/65/EU | Electrical/electronics restricted substances | Not typical for packaging, verify if applicable |
| ASTM D1238-20 / ISO 1133-1:2022 | Quality control of melt mass-flow rate | Incoming lot testing against specification |
Application of Elvax 220W to untreated polypropylene, polyethylene, or fluoropolymer substrates requires surface treatment by corona, plasma, or primer. Without treatment, peel strength under ASTM D1876-08(2015) can be below 1 N/mm on unpolar surfaces, but published data for this specific resin on all film grades is limited. Adhesives for low-temperature service below 0 °C should be formulated with lower-MFR grades or plasticizers to compensate for reduced flexibility; the high melt index of Elvax 220W corresponds to lower chain entanglement and lower cohesive strength than Elvax 240W or Elvax 250. In bookbinding, flexible spine adhesives require open time and film integrity; the resin is compounded with waxes and rosin esters to balance layflat and pull strength. Woodworking edge-banding adhesives formulated with Elvax 220W exhibit fast setting but may show creep under sustained load at 60 °C; heat resistance should be verified by ASTM D4498-07 or an equivalent hot-shear method. For nonwoven construction, sprayable hot-melt systems use the low viscosity to achieve fibre-fibre bonding, but bond strength is highly dependent on melt temperature and nip pressure. Equipment contact surfaces should be made of stainless steel; prolonged contact with copper alloys is discouraged. Production trials should be designed with a minimum of three application temperatures and two coat weights to identify the operating window on the target substrate.
