| HS Code | 600049 |
| Vinyl Acetate Content | 33 wt% |
| Melt Flow Rate 190 C 2 16 Kg | 25 g/10 min |
| Density | 0.952 g/cm³ |
| Melting Point Dsc | 73 °C |
| Ring And Ball Softening Point | 92 °C |
| Vicat Softening Temperature | 44 °C |
| Brookfield Viscosity 140 C | 1400 mPa·s |
| Tensile Strength At Break | 12 MPa |
| Elongation At Break | 800% |
| Hardness Shore A | 74 |
| Flexural Modulus | 26 MPa |
| Freezing Point | 57 °C |
As an accredited PRIMEVA P33025C EVA Copolymer Resin,Hot Melt Adhesive Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as free-flowing pellets in 25 kg multi-wall paper bags, or 500 kg bulk supersacks. |
| Container Loading (20′ FCL) | One 20′ FCL of PRIMEVA P33025C EVA copolymer resin, hot melt adhesive grade, packed in bags on pallets, ready for shipment. |
| Shipping | PRIMEVA P33025C EVA Copolymer Resin, Hot Melt Adhesive Grade, is supplied as free-flowing pellets in 25 kg multi-wall paper bags or 500 kg octabins. Shipped via standard dry containers or covered trucks. Protect from moisture, direct sunlight, and excessive heat. Not classified as dangerous goods for transport. |
| Storage | Store PRIMEVA P33025C EVA Copolymer Resin in a cool, dry, well-ventilated area away from direct sunlight, ignition sources, and strong oxidizing agents. Keep containers tightly sealed to prevent moisture contamination and physical contamination. Avoid prolonged exposure to temperatures above 30–40°C to prevent agglomeration. Maintain stable conditions and use FIFO rotation to preserve adhesive quality. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored unopened in a cool, dry area. |
Corrugated carton sealing on automated packaging lines represents one of the highest-volume downstream applications for PRIMEVA P33025C. A production formulation containing 35 wt% P33025C EVA copolymer, 40 wt% C5/C9 aliphatic-aromatic hydrocarbon tackifier, 24 wt% Fischer-Tropsch wax and 1 wt% hindered phenolic antioxidant is processed in heated tank melters fitted with variable-speed piston pumps. The melt pool is maintained at 160 °C to 165 °C, while nozzle temperature is set at 170 °C to 175 °C. Application through a 0.5 mm diameter slot die delivers 1.5 g/m² to 2.5 g/m² adhesive to the carton flap. Compression open time is 2.0 s to 3.5 s, with set-to-fiber-tear bonds observed on recycled corrugated board at 25 °C. Food contact compliance requires the adhesive to remain behind a functional barrier under FDA 21 CFR 175.105 and the EVA copolymer to meet FDA 21 CFR 177.1350 specifications for extractives. The material is also screened against RoHS Directive 2011/65/EU for lead, mercury and hexavalent chromium at homogenized concentrations below 0.1 wt%, and cadmium below 0.01 wt%. A known production failure mode is char accumulation in the tank corners when melt temperature exceeds 190 °C for more than 2 h; nitrogen-blanketed melters reduce measurable viscosity drift to below 5% over an 8 h shift as determined by ASTM D3236-15 at 180 °C. For high-moisture corrugated stock at RH above 60%, pre-drying of the substrate is required because trapped water vapor causes micro-foaming in the bead, reducing fiber tear from full to partial at press speeds above 120 boxes/min. The terminal product is a sealed corrugated shipper, including frozen food and consumer goods cartons where cold-chain set speed and recycled board adhesion are critical.
In perfect-bound book lines running at chain speeds above 12,000 cycles/h, PRIMEVA P33025C is compounded at 38 wt% with 34 wt% rosin ester tackifier, 20 wt% paraffin wax and 8 wt% styrenic block copolymer modifier. Spine-gluing temperature is 165 °C to 175 °C; side-glue application temperature is 150 °C to 160 °C to avoid page penetration. The spine glue is applied by a roller wheel at 0.4 mm to 0.8 mm film thickness, followed by case clamping at 0.15 MPa to 0.25 MPa for 4 s to 6 s. Side glue is delivered at 0.25 g/m² to 0.35 g/m² to the outer signatures. Open time of 4 s to 8 s is critical. Side-glue penetration into coated paper becomes unacceptable when viscosity drops below 1,200 mPa·s at 160 °C, measured by ASTM D3236-15. Pot stability under ASTM D4497-21 at 175 °C for 72 h must retain viscosity within ±10% and softening point within ±5 °C by ASTM E28-99. The finished product is a perfect-bound catalog or softcover book; pull-out force is evaluated by a 90 N to 140 N page pull test using a tensile tester at 50 mm/min, though published data for P33025C in this specific test configuration is limited. REACH Regulation (EC) No 1907/2006 Annex XVII and Toy Safety Directive 2009/48/EC migration limits for PAHs apply when the book is marketed to children under 36 months. Typical production failures are spine cracks below 0 °C because the paraffin wax crystallizes; low-temperature flexibility is improved by reducing wax content from 20 wt% to 14 wt%, but this increases setting time and raises blocking risk in warm warehouses.
When a primerless 1.0 mm ABS edge band is pressed onto an MDF core at a line speed of 25 m/min to 40 m/min on an IMA or Homag edge banding machine, the adhesive must maintain a viscosity plateau above 80,000 mPa·s at 180 °C under the roller. A hot melt containing 30 wt% PRIMEVA P33025C, 38 wt% hydrogenated hydrocarbon tackifier, 22 wt% Fischer-Tropsch wax, and 10 wt% maleated polypropylene wax is applied through a heated slot nozzle. Application temperature is 185 °C to 195 °C. Compression roller pressure is 0.3 MPa to 0.5 MPa with a contact time of 0.8 s to 1.2 s. Peel adhesion to ABS is evaluated according to ISO 4587:2003 lap shear geometry using 25 mm bonded area; values in the range of 2.5 MPa to 3.5 MPa are considered acceptable for interior furniture. Thermal shear stability is controlled because edge banding applicators operate with continuous circulation; the viscosity after 24 h at 190 °C must not increase more than 15% as measured by ASTM D3236-15 using a Brookfield Thermosel with Spindle 27. The terminal products are office panels and cabinet doors. The operational boundary is firm: not suitable for exterior weather exposure or sustained water immersion; adhesion to melamine-faced MDF may fall below acceptable after 7 days at 85% RH when no primer is used.
For automotive door inserts, a low-VOC formulation based on 32 wt% PRIMEVA P33025C, 36 wt% fully hydrogenated tackifier, 25 wt% polyethylene wax, 5 wt% amorphous poly-alpha-olefin and 2 wt% antioxidant masterbatch is sprayed using a rotary misting head at 150 °C to 160 °C. The spray head generates bead diameters of 0.2 mm to 0.4 mm. Open time before lamination is 15 s to 25 s, and compression is applied at 0.05 MPa to 0.10 MPa for 10 s to 20 s. VOC emissions from the finished laminate are measured according to VDA 278:2011 thermodesorption analysis; the formulation is designed to maintain volatile organic compound emissions below 100 µg/g when tested at 90 °C for 30 minutes. Fogging is measured according to DIN 75201:2011 method B, with reflectance values above 90% after 3 h at 100 °C. A documented production failure is cold spray nozzle blockage when wax crystallizes below 140 °C; therefore, all hoses, filters, and spray heads must be maintained above 145 °C with heated transfer lines. The final assembly is an interior door panel or armrest insert. Published data for P33025C in this specific configuration is limited; emitted figures are based on standard formulations for low-VOC EVA hot melts and must be verified against the supplier technical datasheet.
Molten adhesive for profile wrapping of thin PVC, PET and paper veneer onto MDF or particleboard profiles is applied at 140 °C to 160 °C by a single roller or slot nozzle. A compound based on 28 wt% PRIMEVA P33025C, 40 wt% rosin ester tackifier, 22 wt% microcrystalline wax, and 10 wt% polyolefin wax is used when high initial tack at 10 s to 15 s open time is required. The adhesive is deposited at 30 g/m² to 60 g/m² depending on profile geometry and veneer porosity. Line speeds on a profile wrapping machine with a heated pressure zone range from 15 m/min to 45 m/min. After the profile passes through the heated calibration rollers, cooling to below 25 °C for 15 s is required before cutting to prevent adhesive transfer onto saw blades. Adhesion to untreated uPVC veneer is tested using a 180° peel test adapted from ASTM D903-98 at a separation rate of 100 mm/min; typically, 2 N/mm to 4 N/mm bond strengths are achieved. VOC and formaldehyde emissions from the wrapped profile are checked against EN 717-1:2004 and EN 16516:2017+A1:2020 for indoor furniture markets. The final parts are furniture edging strips, cabinet profiles and decorative trim. A critical boundary is sustained exposure above 60 °C, which causes creep in the thermoplastic bond; dark-colored profile surfaces in direct sunlight are not recommended without additional mechanical fastening.
For spiral-wound automotive oil filter cartridges, a hot melt compound using PRIMEVA P33025C at 33 wt% with 37 wt% cycloaliphatic hydrocarbon resin, 22 wt% paraffin wax, and 8 wt% ethylene-propylene copolymer is pumped through heated transfer lines at 165 °C to 175 °C. The adhesive is ejected as a 1.0 mm to 1.5 mm bead at 0.8 g/m to 1.2 g/m onto the filter paper seam before spiral winding. Bond integrity is measured by first bubble point according to ISO 2942:2004, with the seam required to withstand a pressure differential above 0.8 MPa at 120 °C for 500 h. Compression rollers are set to 0.5 MPa and winding speed is 30 m/min to 50 m/min. Production failure modes include blocked nozzle tips caused by carbonized particles when pot temperature exceeds 200 °C; char deposits in gear pumps increase pressure drop from 3.5 MPa to above 5.0 MPa and reduce bead uniformity. Ethylene-vinyl acetate formulations without crosslinking are limited to continuous oil exposure below 120 °C because creep modulus decreases. REACH Regulation (EC) No 1907/2006 Annex XVII restrictions on polycyclic aromatic hydrocarbons apply to hydrocarbon tackifiers, with polycyclic aromatic content screened using IP 346. The terminal products are full-flow oil filter cartridges and fuel filter elements.
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PRIMEVA P33025C is an ethylene-vinyl acetate copolymer resin designated for hot melt adhesive compounding and direct adhesive application. The grade carries a nominal vinyl acetate content of 33 wt% and a melt flow index of 25 g/10 min when measured at 190 °C under a 2.16 kg load according to ASTM D1238-20 or ISO 1133-1:2022. Density is specified as 0.95 g/cm³ under ISO 1183-1:2019. The copolymer is supplied as free-flowing pellets or pastilles without slip agents or antiblock packages that could interfere with tackifier wetting; a 500–1000 ppm parting agent is applied only when specified by the converter to prevent blocking during bulk handling. The polymer backbone is produced by high-pressure radical copolymerization, resulting in a largely random distribution of vinyl acetate units along the ethylene chain and the absence of reactive terminal groups capable of participating in moisture-cure or silane-grafting chemistries.
At 33 wt% vinyl acetate, the crystallinity of the copolymer is reduced relative to hot melt grades based on 18–28 wt% vinyl acetate. This change in comonomer content lowers the onset of melting and broadens the thermal transition measured by differential scanning calorimetry under ISO 11357-3:2018. The practical effect is a lower minimum activation temperature in slot-die and roller coating, allowing fibres and coated paperboard to bond at melt temperatures of 150–170 °C rather than the 170–190 °C often required for lower-vinyl-acetate systems. The higher polar comonomer content also improves wetting on cellulose, aluminium oxide, and corona-treated polyester surfaces without primer application.
Relative to high-melt-index EVA grades above 100 g/10 min, the 25 g/10 min melt flow index of PRIMEVA P33025C produces higher melt viscosity and greater cohesive strength after solidification. This restricts over-penetration into corrugated medium and uncoated paper, which is advantageous when bond line thickness must remain above 50 µm under compression. Relative to grades below 6 g/10 min, this resin permits application through narrow nozzles and heated hoses at 160–180 °C without excessive pump pressure or melt fracture. These differences are most apparent in slot-die coating of porous substrates. At equal coat weight, a lower-vinyl-acetate EVA with a melt flow index of 10 g/10 min may require die temperature above 190 °C to achieve fibre tear on recycled corrugated board, whereas PRIMEVA P33025C reaches equivalent fibre tear at 165 °C. The reduction in activation temperature lowers energy input and reduces thermal degradation of heat-sensitive tackifiers. However, the higher vinyl acetate content also reduces resistance to creep at elevated temperature; formulators must compensate with high-softening-point tackifiers when the bonded package is subjected to temperatures above 50 °C.
| Property | PRIMEVA P33025C | Lower-VA EVA hot melt grade | High-MI EVA hot melt grade |
|---|---|---|---|
| Vinyl acetate content | 33 wt% | 18–28 wt% | 28–40 wt% |
| Melt flow index (190 °C/2.16 kg) | 25 g/10 min | 2–15 g/10 min | 100–800 g/10 min |
| Melting range by ISO 11357-3 | 60–70 °C | 75–90 °C | 50–65 °C |
| Molten viscosity at 180 °C | Intermediate | High | Low |
| Adhesion to polar substrates | High | Moderate | High, with lower cohesive strength |
| Typical application temperature | 150–180 °C | 170–200 °C | 140–170 °C |
In twin-screw compounding lines with L/D ratios between 40:1 and 48:1, PRIMEVA P33025C is dry-blended with rosin ester tackifiers at ratios of 1:1 to 1.5:1 and with Fischer-Tropsch wax at 5–15 wt%. Barrel temperature settings are ramped from 120 °C in the feed throat to 180 °C at the die plate, and screw speed is adjusted to maintain specific mechanical energy input below 0.18 kWh/kg to avoid local shear heating above 200 °C. Screw profiles use kneading blocks only in the first two mixing zones; downstream kneading elements are reduced or removed because the resin is already molten and excessive shear raises acid number in compounded material. Sustained melt temperatures above 200 °C with oxygen ingress induce deacetylation of vinyl acetate units, releasing acetic acid and causing viscosity drift, char adhesion to hot melt tank walls, and corrosion of unprotected carbon steel surfaces. In continuous coating operations running above 200 m/min, melt flow index is monitored by online capillary rheometry; a shift of ±2 g/10 min from target can change coat weight on a 400 mm slot-die by approximately ±8%, although published line-specific data for this exact configuration remain limited. Batch-to-batch variation in pellet size distribution should be controlled because fines below 500 µm can bridge in vacuum hoppers and produce feed rate oscillation.
The base resin is specified with volatile content not exceeding 0.1 wt% when determined by loss-on-drying following ASTM D6868-21. Because the copolymer itself absorbs little moisture, the greater hydrolysis risk in compounded adhesives arises from ester-based tackifiers and oxidized waxes. When ambient relative humidity exceeds 60%, pre-drying of the resin at 50–60 °C for 4 h in a desiccant-bed dryer is applied before extrusion. Residual moisture above 0.05 wt% accelerates hydrolysis of rosin ester tackifiers, generating acidic species that lower system pH and promote further EVA deacetylation.
Thermogravimetric analysis under nitrogen at 10 °C/min according to ISO 11358-1:2022 records the onset of thermal decomposition near 320–340 °C for the base resin. This does not define an acceptable processing limit: in hot melt tanks held at 200 °C for 8 h, viscosity drift of 10–20% has been observed in compounded EVA systems due to combined chain scission and crosslinking. Hot melt pots should therefore be set at 160–180 °C, blanketed with nitrogen, and equipped with recirculating pumps rather than high-shear gear pumps at high backpressure. Formulations containing amine-based antioxidants or alkaline fillers should be avoided because these components accelerate deacetylation and discoloration. Hindered phenol antioxidants at 0.3–0.8 wt% and phosphite secondary antioxidants at 0.1–0.3 wt% extend pot life, but no stabilizer package eliminates the need for temperature control and oxygen exclusion.
In case and carton sealing, compounded formulations based on PRIMEVA P33025C are applied at 160–180 °C through slot-die or bead nozzles. Open time is controlled between 5 s and 15 s, depending on wax loading, and compression time is set to 0.5–2 s at 0.2–0.5 MPa. Lap shear strength of bonded corrugated board is evaluated under ASTM D906-20, with substrate fibre tear often occurring before adhesive failure once the adhesive film has cooled below 40 °C.
For bookbinding spine gluing, the resin is compounded with atactic polyolefins or ethylene-vinyl acetate waxes to adjust flexibility. Nozzle application at 170 °C is common, and the molten adhesive must penetrate coated paper without strike-through. The higher melt viscosity of PRIMEVA P33025C relative to high-MI grades limits excessive penetration and supports lay-flat performance. In profile wrapping of PVC and decorative paper foils onto MDF or HDF, the adhesive is applied by roller at 180–190 °C; heat resistance after bonding is tested under ASTM D4498-07 with a static load of 500 g and a temperature ramp of 0.5 °C/min.
Nonwoven construction adhesives for disposable hygiene products represent a further application window. The resin is formulated with hydrogenated hydrocarbon tackifiers and mineral oil at 10–20 wt% to reduce viscosity for spiral spray application. Spray temperatures of 150–170 °C with hot air flow of 0.3–0.6 m³/min produce fibreized adhesive patterns; the 25 g/10 min melt flow index provides adequate atomization without excessive misting when nozzle distance is maintained at 10–15 mm. Compared with polyamide and reactive polyurethane hot melt adhesives, EVA systems based on PRIMEVA P33025C remain thermoplastic and can be re-melted, allowing rework of misaligned parts. They exhibit lower solvent resistance and a practical upper service temperature below 80 °C; continuous exposure to plasticizer-containing PVC can produce bond softening within 30–90 days, so compatibility testing under ISO 23936-1:2022 or customer-specific extraction protocols is required before use in flexible PVC assemblies.
High-speed lamination lines often specify melt flow index as the primary incoming resin control. A positive shift of 3–5 g/10 min above target lowers molten viscosity sufficiently to reduce coat weight control, promote strike-through on lightweight paper, and increase stringing at nozzle cut-off. Stringing is quantified by high-speed camera observation of break-off behaviour; a tail length greater than 10 mm at 50 mm/s nozzle retraction is considered unacceptable for carton sealing. Conversely, a negative shift below 20 g/10 min raises pump backpressure and may reduce adhesion to porous substrates because the adhesive does not wet the surface within the available compression time. The narrow melt flow index band of ±3 g/10 min is therefore maintained by blending from bulk containers rather than by processing scrap remelt, which alters molecular weight distribution and increases gel content.
Adhesive performance in packaging is evaluated by fibre-tear coverage on recycled corrugated board after conditioning at -20 °C, 23 °C, and 50 °C for 24 h. At low temperature, the compounded adhesive becomes stiffer and may lose fibre tear on coated board if wax level exceeds 15 wt%. At 50 °C, shear creep under a 1 kg weight on a 25 mm by 25 mm bond is measured by ASTM D3654-19 or equivalent; failure before 4 h indicates insufficient heat resistance for palletizing operations in warm warehouses.
Regulatory assessments are formulation-specific. In the United States, adhesives for food packaging may be evaluated under 21 CFR 175.105 when a functional barrier separates the adhesive from food, while European converters may apply Regulation (EU) No 10/2011 for plastic materials and articles. PRIMEVA P33025C itself does not contain halogenated flame retardants or lead-based stabilizers, and its heavy metal content is typically below detection limits of 10 mg/kg under EN 71-3:2019+A1:2021 extraction. These statements apply only to the base resin, not to finished hot melt formulations. The resin should not be combined with amine-based epoxy curatives, strong alkaline fillers, or free carboxylic acid-containing tackifiers without pre-screening, as these accelerate deacetylation and can generate volatile acetaldehyde. Chlorinated paraffins and some phosphate plasticizers may phase-separate at levels above 5 wt%, causing loss of clarity and blocking in the adhesive film. The grade is not intended for structural applications requiring lap shear strengths above 5 MPa or for continuous service above 80 °C under load.
