| HS Code | 698500 |
| Product Name | Elvax 210W EVA Copolymer Resin, Adhesive Grade |
| Resin Type | Ethylene-Vinyl Acetate (EVA) Copolymer |
| Grade | Adhesive Grade |
| Physical Form | Pellets |
| Vinyl Acetate Content | 28 wt% |
| Melt Flow Rate | 400 g/10 min (190°C/2.16 kg) |
| Density | 0.950 g/cm³ |
| Melting Point | 80°C |
| Vicat Softening Point | 64°C |
| Tensile Strength At Break | 6 MPa |
| Elongation At Break | 800% |
| Hardness | 80 Shore A |
As an accredited Elvax 210W EVA Copolymer Resin,Adhesive Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaging: 25 kg multi-ply paper bags containing Elvax 210W EVA copolymer resin, adhesive grade, in free-flowing pellet form. |
| Container Loading (20′ FCL) | 20′ FCL: Elvax 210W resin bags loaded on pallets, secured and ventilated to prevent damage, ensuring safe transport. |
| Shipping | Elvax 210W EVA Copolymer Resin ships as non-hazardous pellets in clean, dry bags or drums. Protect from moisture, excessive heat, and direct sunlight during transit. Standard freight handling suffices; avoid sharp impacts to prevent bag tearing. Store in a cool, ventilated area until use. No special transportation declarations required. |
| Storage | Store Elvax 210W EVA Copolymer Resin in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep the original container tightly sealed to prevent moisture absorption and contamination. Maintain moderate temperatures to avoid blocking or agglomeration. Keep away from strong oxidizers. Under these conditions, shelf life is stable for several years. |
| Shelf Life | Store in original containers, away from heat, moisture, and sunlight. Shelf life is typically two years from shipment under recommended conditions. |
Under line-speed conditions above 300 m/min, corrugated case and carton sealing adhesives fail most often by melt-fracture at the nozzle, not by insufficient fiber tear. Elvax 210W, with a nominal vinyl acetate comonomer content of 28 wt% and a melt mass-flow rate of 400 g/10 min as determined under ISO 1133-1:2022 at 190 °C/2.16 kg, is compounded to depress hot-melt viscosity while retaining polar adhesion to recycled linerstock. Starting formulations contain 30–40 wt% resin, 35–45 wt% C5/C9 hydrocarbon tackifier, 15–25 wt% paraffin or microcrystalline wax, and 0.5–1.0 wt% hindered phenolic antioxidant. Batch sigma-blade mixers operate at 130–165 °C; continuous twin-screw compounding on L/D 40:1 extruders provides tighter residence-time distribution. The molten adhesive is applied through slot nozzles at 160–180 °C and compressed at 0.3–1.0 MPa before fiber-tear bond development. Indirect food-contact packaging adhesives are assessed under 21 CFR 175.105; the ethylene-vinyl acetate copolymer component is referenced in 21 CFR 177.1350 for certain food-contact articles. Terminal finished product types include regular slotted containers, die-cut mailers, folding carton side seams, and tray-erected produce cases. Process boundary: barrel temperatures above 200 °C accelerate acetic acid evolution and gel formation; if ambient storage exceeds 60% RH, desiccant drying at 55–65 °C for 2 h is recommended to limit surface moisture foaming in extrudate.
| Ingredient | Corrugated case sealing | Folding carton side seam | High-line-speed tray erection |
|---|---|---|---|
| Elvax 210W | 30–33 wt% | 35–38 wt% | 38–42 wt% |
| C5/C9 tackifier | 40–45 wt% | 35–40 wt% | 30–35 wt% |
| Wax | 20–25 wt% | 18–22 wt% | 15–20 wt% |
| Antioxidant | 0.5–1.0 wt% | 0.5–1.0 wt% | 0.5–1.0 wt% |
In perfect binding lines running at 8,000–15,000 cycles/h, the ethylene-vinyl acetate hot melt must transfer through the milled backbone and grip coated or uncoated paper without damaging the folded signature. Formulations for threadless bookblock construction use 35–45 wt% Elvax 210W, rosin ester tackifier, and Fischer-Tropsch wax; the resin contributes low melt viscosity for gear-pump transfer and high vinyl acetate content for adhesion to clay-coated cover stock. Durability requirements for library-bound volumes are evaluated under ANSI/NISO Z39.78, which covers flexing, page-pull, and cold crack testing; commercial trade binding commonly rejects page-pull values below 5 N/cm on coated cover stocks. Production process: vertical high-shear mixers at 130–150 °C discharge through heated hose to a roller coater; adhesive is applied at 160–180 °C to the backbone, followed by nipping at 0.2–0.4 MPa to align the cover and back-glue. Open time after transfer remains 5–10 s before cover nipping. Terminal finished types include perfect-bound paperback books, annual catalogs, magazines, and lay-flat trade publications. Operational boundary: when a polyurethane dispersion primer is used to seal highly porous paper, adhesive bonding can be impaired if the primer pH remains below 6.5; neutralization to 6.5–8.0 before spine application is required.
The viscosity window reflects two competing requirements in edgebanding coaters: roll transfer stability and absence of strike-through on 0.4–2.0 mm PVC, ABS, or melamine edge tapes. Woodworking non-structural thermoplastic adhesives are classified under EN 204:2016 and tested under EN 205:2016; D3 and D4 grades define resistance to interior and limited short-term exterior moisture exposure. Elvax 210W is incorporated at 35–50 wt% to reduce melt viscosity and improve hot tack on medium-density fiberboard cabinet edges. Production line configuration includes a 5–10 kg/h premelter, heated roller coater at 180–200 °C, and nip pressure of 0.3–0.8 MPa at linear speeds of 20–60 m/min. Terminal products include office desking panels, kitchen cabinet doors, storage shelving, and healthcare casework edges. Process conflict: below 60,000 mPa·s at application temperature, adhesive penetration into the board edge becomes excessive and tape show-through increases; above 140,000 mPa·s, roll transfer uniformity and edge peel strength under EN 205 decline. Reservoir hold time should not exceed 4 h at 180 °C to limit vinyl acetate decomposition and doctor-blade plate-out.
Printed paperboard lamination to corrugated board through curtain or wheel coaters imposes a short open time because the aqueous pre-print and cellulosic substrate quench the molten adhesive. Elvax 210W is formulated at 25–35 wt% with aromatic-modified C9 tackifier and high-melting microcrystalline wax; the 400 g/10 min melt mass-flow rate allows curtain coater slot speeds up to 120 m/min at 150–170 °C. Indirect food packaging compliance follows 21 CFR 175.105; the copolymer component is evaluated under 21 CFR 177.1350, and extraction testing for dry foodstuff contact is performed according to EU Regulation 10/2011. Production process: adhesive is delivered from an 80–150 L tank melter through heated hose to a slot die, cast as a 20–50 µm film, and nipped at 0.5–1.0 MPa onto the printed paperboard and corrugated backer. Bond strength is measured by T-peel according to ASTM D1876-08; recycled corrugated liners require fiber-tear percentages typically above 80% for production release. Terminal finished types include blister cards, tray-and-hood consumer packaging, multiwall bag overwrap, and display basecards. Boundary: blanks stored at relative humidity above 70% can lose fiber-tear adhesion on recycled liners due to weak boundary-layer failure. Published data for specific UV-cured high-gloss surfaces is limited; plant trials are required.
Industrial assembly adhesives for filter frames, small appliance trims, HVAC gaskets, and automotive interior clips remain in heated reservoirs for extended shifts. Elvax 210W is compounded at 30–40 wt% with hydrogenated tackifier and polyethylene wax; resulting melt viscosity at 180 °C is controlled within 500–2,500 mPa·s under ASTM D3236-15 using Brookfield Thermosel spindle 27. Compliance documentation for bonded polypropylene and ABS assemblies commonly references ISO 4587:2003 tensile lap-shear strength, with acceptance values for non-structural brackets in the 1.0–2.5 MPa range, and ASTM D1002-10 for metal-to-metal shear specimens when filter frame wire loops are joined. Production equipment includes heated pail melters with nitrogen blanketing at 5–10 L/min and slot or bead applicators operating at 160–190 °C; robotic bead dispensers require nozzle temperature control within ±5 °C to limit stringing. Thermal degradation is the dominant operational boundary; reservoir hold time above 8 h at 170 °C can increase viscosity by 10–20%, generate char at tank walls, and plug nozzles. Terminal products include HEPA filter frame assemblies, refrigerator trim profiles, automobile door bolster strips, and injection-molded appliance buffer pads. Compatibility limitation: polyamide-based adhesion promoters with primary amine terminal groups should not be pre-blended into the molten EVA without neutralization; amine-catalyzed ester hydrolysis generates acetic acid and destabilizes the hot melt.
Coated textile laminates for automotive trunk liners and floor trays demand a low-viscosity hot melt that can be sprayed through swirl nozzles onto polypropylene carpet backings without corroding the polyolefin. In these textile lamination lines, Elvax 210W is incorporated at 25–35 wt% with hydrogenated hydrocarbon tackifier and low-density polyethylene wax; the resulting adhesive is applied at 150–180 °C through swirl spray heads at coating weights of 5–20 g/m², then nipped at 0.2–0.5 MPa against a contoured fiberboard or foam core. Automotive interior adhesive specifications for volatile organic compounds are documented under VDA 278; mechanical durability of the bonded laminate is evaluated by tensile lap-shear according to ISO 4587:2003 and peel resistance according to ASTM D903-98. Terminal finished types include trunk load floor composites, seat-back trim laminates, acoustic dash insulators, and door card carpet inserts. Process boundary: when the polypropylene carpet backing has surface tension below 38 mN/m, in-line corona treatment is required before hot-melt application to avoid bead-up and delamination. Published data for specific swirl nozzle configurations on high-bulk recycled carpet fibers is limited; production validation is required for each fiber supplier.
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Elvax 210W is an ethylene-vinyl acetate copolymer resin supplied as translucent pellets for hot-melt adhesive compounding. The product carries a nominal vinyl acetate comonomer content of 28 wt%, as determined by film-based infrared spectroscopy, and a melt index of 400 g/10 min measured under ASTM D1238-20 at 190 °C with 2.16 kg. Density is typically 0.95 g/cm³ under ASTM D1505. Ring-and-ball softening point, when measured by ASTM E28, usually falls between 70 °C and 90 °C. These properties place the grade in the high-flow, low-viscosity segment of adhesive-grade EVA resins used for case sealing, bookbinding, paperboard lamination, and polymer modification. The high melt index reduces molten viscosity during application, while the vinyl acetate content supplies sufficient polarity for adhesion to cellulosic substrates, coated papers, and polar films.
Vinyl acetate units in the ethylene copolymer backbone disrupt polyethylene crystallinity and introduce polar acetate groups. The effect is measurable in reduced crystallinity, lower crystalline melting point, and increased compatibility with rosin ester and terpene phenolic tackifiers. For Elvax 210W, the 28 wt% vinyl acetate content produces a polymer with lower modulus and greater low-temperature flexibility than copolymers containing 18 wt% vinyl acetate. In hot-melt formulations, this polarity promotes wetting of uncoated kraft, clay-coated board, and flexible polymer films. The high vinyl acetate level also increases tolerance for polar plasticizers and improves adhesion retention under refrigerated conditions. However, it raises the thermal sensitivity of the molten resin because acetate elimination can generate acetic acid at elevated temperatures. Formulators should therefore limit sustained melt temperatures above 190 °C unless thermal stabilizers are present.
At 180 °C, Brookfield viscosity of neat Elvax 210W is typically below 1,000 mPa·s when tested with a thermosel spindle at 20 rpm under ASTM D3236. This low viscosity enables curtain coating, slot-die application, and high-speed wheel pot operations without excessive pump pressure. The high flow also improves mixing with waxes and tackifiers in lower-shear equipment. However, the same molecular weight characteristic responsible for high melt index reduces cohesive strength and melt strength when compared with 25–50 g/10 min EVA grades. In high-speed case sealing, this trade-off is usually acceptable because wetting speed controls bond formation more than cohesive strength. In structural or load-bearing adhesive applications, the grade may require blending with a lower melt index EVA or a styrenic block copolymer to maintain cohesive integrity.
Thermal processing of Elvax 210W requires attention to dwell time, temperature, and moisture. Preheat polymer in a desiccant dryer at 60–70 °C for 2 h when storage relative humidity exceeds 60 % because surface moisture can create void formation in the melt film. Extrusion compounding on a twin-screw extruder with 40:1 L/D and segmented conveying elements typically uses barrel temperatures from 120 °C to 180 °C. Melt pressure upstream of the strand die is monitored to control batch-to-batch viscosity variation; pressures above manufacturer limits indicate undispersed tackifier or degraded resin. At temperatures above 200 °C, viscosity may first decrease, then rise as crosslinking or gelation occurs. Operators running heated tanks with gear pumps should avoid residence times longer than 6 h at 180 °C without nitrogen blanket protection.
In paperboard lamination and film-to-paper converting, Elvax 210W allows low coating weights because its molten film resists draw resonance and pinholing at typical application temperatures from 160 °C to 180 °C. Slot-die coaters running above 300 m/min benefit from the low shear viscosity, although the exact maximum line speed depends on formulation wax content and roll-release characteristics. Coating weight control is best achieved with gravimetric or gear pump metering; open-loop screw speed adjustment is less accurate at low pump speeds because of non-Newtonian shear thinning. Bond strength is assessed by T-peel testing according to ASTM D1876, while heat resistance of the bonded assembly is typically measured by shear adhesion failure temperature under ASTM D4498. Published data for specific line configurations is limited, but supplier processing guides routinely recommend melt temperatures between 160 °C and 180 °C for high-flow EVA adhesive grades.
| Property | Test method | Elvax 210W | Lower-MI 28 wt% VA EVA reference | Low-VA high-MI EVA reference |
|---|---|---|---|---|
| Vinyl acetate content | Internal FTIR calibration | 28 wt% | 27–29 wt% | 17–19 wt% |
| Melt index | ASTM D1238-20 at 190 °C/2.16 kg | 400 g/10 min | 25–50 g/10 min | 400–500 g/10 min |
| Density | ASTM D1505 | 0.95 g/cm³ | 0.95 g/cm³ | 0.94 g/cm³ |
| Ring-and-ball softening point | ASTM E28 | 70–90 °C | 85–105 °C | 65–85 °C |
| Brookfield viscosity at 180 °C | ASTM D3236 | <1,000 mPa·s | >5,000 mPa·s | <800 mPa·s |
The matrix shows the functional difference between Elvax 210W and two reference EVA types. Compared with a lower melt index resin at the same vinyl acetate level, Elvax 210W reduces molten viscosity and improves substrate wetting speed but sacrifices cohesive strength and heat resistance. Compared with a low-vinyl acetate high-melt-index grade, Elvax 210W provides better adhesion to polar surfaces and better low-temperature flexibility because of its higher polar comonomer content. These differences are expressed in hot-melt formulations as lower application temperature capability, faster bonding to kraft and coated board, and reduced cold-crack tendency in refrigerated packaging.
| Compliance domain | Standard or method | Assessment condition |
|---|---|---|
| US food-contact base polymer | FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers permitted for food-contact articles; final extractives and end-use limits apply. |
| US food-contact adhesive | FDA 21 CFR 175.105 | Adhesives may contact food through a functional barrier or minimal transfer; final formulation must be evaluated. |
| EU plastic food-contact materials | EU Regulation 10/2011 with EN 1186-1 and EN 13130-1 | Overall migration and vinyl acetate-specific migration depend on contact time, temperature, and article thickness. |
| REACH | EC 1907/2006 | Polymer is exempt from registration as a polymer; monomer residues must meet substance-specific restrictions. |
| Industrial adhesive VOC testing | ASTM D2369 or equivalent method | Volatile content is formulation-dependent; neat resin volatile content is typically low but must be confirmed per batch. |
For industrial formulation development, the resin is frequently compounded with hydrocarbon tackifiers, paraffin or microcrystalline waxes, and hindered phenolic antioxidants. A typical starting point for case sealing contains 30–35 wt% Elvax 210W, 25–30 wt% tackifier, 20–25 wt% wax, and 0.5–1.0 wt% antioxidant. The polymer is melted and mixed in a jacketed sigma-blade mixer or twin-screw compounder at 160–180 °C. Addition of tackifier before wax improves tackifier dispersion because the initial resin melt has higher viscosity and higher shear transfer. Wax is then added to drop viscosity and reduce open time. Batch-to-batch variation is controlled by monitoring Brookfield viscosity and softening point before discharge. In continuous hot-melt production, gear pump filtration through 100–200 µm screens removes char and gel particles that form during extended heating. Published data for this specific configuration is limited, but equipment manufacturers recommend melt filtration for high-flow EVA adhesives to protect slot-die lips from microgel deposition.
Elvax 210W should not be processed with amine-based additives that can catalyze acetate hydrolysis or promote undesirable color generation. Strong acids and bases are also incompatible because they accelerate deacetylation. If the formulation requires a reactive coupling agent or maleated polyolefin, preliminary blending trials should be run at the lowest feasible temperature to avoid premature viscosity increase and gel formation. Pre-drying is recommended at 60–70 °C for 2 h when pellet surface moisture is suspected. The resin is not hygroscopic in the same manner as polyamide or polyester, but surface condensation from cold storage can create processing defects. In hot-melt tanks, nitrogen blanketing or inert gas coverage is recommended when melt hold time exceeds 4 h at 180 °C. Without nitrogen, surface oxidation can produce a skin layer that breaks into gel particles and blocks adhesive nozzles.
In polymer modification, Elvax 210W functions as a high-flow carrier resin for pigment and additive masterbatches. Its low melt viscosity helps wet pigment aggregates under high shear, and its ethylene segments provide compatibility with polyolefin matrices during letdown. The vinyl acetate groups also improve adhesion to polar fillers such as calcium carbonate and aluminum trihydrate. Masterbatch containing 20–50 wt% pigment can be produced on a twin-screw extruder with 32:1 L/D using distributive mixing elements. However, the high melt index of this grade reduces melt strength in strand extrusion, so a lower melt index EVA or low-density polyethylene is sometimes included at 10–20 wt% to stabilize the strand. This application demonstrates the main boundary of Elvax 210W: it is selected for flow, wetting, and dispersing efficiency rather than load-bearing strength. Formulation viscosity at 180 °C should be confirmed by ASTM D3236 because additive loading changes the shear-thinning slope and final application temperature window.
