| HS Code | 233423 |
| Product Name | PRIMEVA P33400 |
| Polymer Type | Ethylene-Vinyl Acetate (EVA) Copolymer |
| Vinyl Acetate Content | 33 wt% |
| Melt Flow Rate | 400 g/10 min (190°C, 2.16 kg) |
| Density | 0.960 g/cm3 |
| Viscosity | Low viscosity (approximately 3,000 mPa·s at 180°C) |
| Softening Point | Approximately 110°C (Ring and Ball) |
| Tensile Strength | Approximately 5 MPa |
| Elongation At Break | Approximately 700% |
| Hardness | Approximately Shore A 65 |
| Glass Transition Temperature | Approximately -35°C |
As an accredited PRIMEVA P33400 EVA Copolymer Resin,Low Viscosity 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 25 kg net multi-ply paper bags of off-white pellets. Low viscosity EVA resin for hot melt adhesive applications. |
| Container Loading (20′ FCL) | Loading 20′ FCL: PRIMEVA P33400 EVA resin packed in 25kg bags on pallets, shrink-wrapped, approximately 20 metric tons per container. |
| Shipping | PRIMEVA P33400 EVA Copolymer Resin ships as solid pellets in 25 kg bags, bulk sacks, or meltable containers. Use dry, covered transport to prevent moisture ingress. Avoid excessive heat, direct sunlight, and ignition sources. Store in a cool, dry, ventilated area before use. Standard freight conditions apply. |
| Storage | Store PRIMEVA P33400 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep the container tightly sealed to prevent moisture and contamination. Avoid storage temperatures above 40°C, as the resin may soften or agglomerate. Keep away from strong oxidizers. |
| Shelf Life | Store in original sealed packaging, away from heat and moisture. Shelf life is two years from date of manufacture. |
High-speed rotary wheel and nozzle applicators used for corrugated case and folding carton sealing at 45–85 m/min impose a narrow viscosity window: finished melt viscosity above 2,000 mPa·s at 160°C causes pump cavitation and bead stringing, while viscosity below 500 mPa·s produces substrate soak-through and compression set failure on high-porosity recycled corrugated board. PRIMEVA P33400 EVA copolymer resin, with a nominal vinyl acetate content of 33 wt% determined by ISO 8985 and a melt mass-flow rate of 400 g/10 min at 190°C/2.16 kg per ISO 1133-1:2022, permits formulation at lower processing temperatures because the high melt flow index reduces torque and allows dispersion of high-softening-point tackifiers without exceeding 150–160°C. Tackifier softening point is selected between 95°C and 110°C by ASTM E28-18. In a representative case-sealing compound, the copolymer is loaded at 28–35 wt% together with 35–42 wt% C5/C9 aliphatic-aromatic hydrocarbon tackifier, 15–22 wt% Fischer-Tropsch wax, and 0.4–0.8 wt% hindered phenolic antioxidant. Melt viscosity is maintained at 800–1,200 mPa·s at 150°C by ASTM D3236-15 using a Brookfield-type rotational viscometer with a Thermosel heated chamber and spindle 27. Heated reservoir and gear-pump systems are set at tank temperatures of 140–160°C and hose/nozzle temperatures of 150–170°C; bead diameters from slot nozzles range from 0.5 mm to 1.2 mm, with open times of 2–5 s and compression cycles of 0.5–1.5 s on high-speed case erectors. Compounding is performed on a co-rotating twin-screw extruder with a 40:1 L/D ratio and vacuum venting at -0.08 MPa to remove low-molecular-weight volatiles; resin pellets are dried at 60–65°C for 2–3 h when storage RH exceeds 60%. For indirect food packaging, the finished adhesive falls under FDA 21 CFR 175.105 when a functional barrier separates the adhesive from food, and EU compliance is assessed under Regulation (EC) No 1935/2004 Article 3 with overall migration per Regulation (EU) No 10/2011 only when the adhesive is not separated from food. Bond failure at freezer temperatures below -20°C is mitigated by the 33 wt% vinyl acetate content, but wax load above 22 wt% reduces low-temperature peel strength and should not be used for frozen-food case lines. Final articles include regular slotted containers, die-cut wraparound case blanks, beverage multipack cartons, and ovenable paperboard trays where the adhesive is applied outside the food-contact boundary.
| End-use area | PRIMEVA P33400 (wt%) | Tackifier (wt%) | Wax/plasticizer (wt%) | Application temperature (°C) |
|---|---|---|---|---|
| Case/carton sealing | 28–35 | 35–42 | 15–22 | 140–160 |
| Perfect binding spine glue | 32–38 | 32–40 | 12–20 | 145–155 |
| Foam lamination | 25–30 | 40–50 | 15–20 | 130–150 |
| Nonwoven construction | 22–28 | 40–48 | 18–25 | 135–155 |
| Profile wrapping | 30–35 | 35–40 | 15–20 | 150–170 |
| Automotive trim lamination | 25–30 | 35–45 | 15–20 | 145–160 |
In perfect binding lines, the spine adhesive is required to penetrate fiber ends and thread notches while maintaining a low-stress film that holds pages under repeated flexing. The limiting ratio is governed by cold-flex adhesion and trough viscosity: increasing the EVA copolymer above 38 wt% lowers melt viscosity but reduces initial grab on coated text paper; increasing tackifier above 40 wt% raises peel adhesion but accelerates color build-up in recirculating troughs above 150°C. A typical spine-gluing formulation for PRIMEVA P33400 uses 32–38 wt% copolymer, 32–40 wt% rosin ester or modified hydrocarbon tackifier, 12–20 wt% microcrystalline wax, and 0.3–0.7 wt% hindered phenolic antioxidant, applied with a heated wheel or extrusion nozzle at 145–155°C. The side glue, if separate, is run at 150–165°C. Spine adhesive viscosity at 150°C is held between 900 and 1,400 mPa·s per ASTM D3236-15 to permit machining through applicator rollers without misting. Perfect binding lines running at 60–150 books/min with gathering, milling, notching, and two-shot adhesive application require thermal stability: after 72 h at 150°C in a recirculating pot, viscosity change should not exceed 20% and color should remain below a Gardner 8 value measured by ASTM D1544. Page pull and flex resistance are evaluated by ASTM D1876-08 T-peel and by repeated 45° flex cycles at -10°C; published data for PRIMEVA P33400 in high-speed perfect binding is limited, so formulation validation on production-scale equipment is required. Bookbinding adhesives must meet REACH (EC) No 1907/2006 requirements for SVHC content and, in library archival grades, may require acid-free formulation; strongly acidic or amine-bearing additives should be avoided in recirculating troughs because they accelerate hydrolytic degradation of the vinyl acetate groups and can generate particulate residues that block side-glue nozzles. Final products are softcover perfect-bound books, thick instruction manuals, annual report catalogs, and layered notepad blocks.
Roll coater and slot-die lines used for polyether and polyester foam lamination rarely tolerate adhesive films above 100 µm because thick films increase peel weight and generate visible bond-line strike. PRIMEVA P33400-based foam-adhesive formulations are compounded with 25–30 wt% copolymer, 40–50 wt% C5 aliphatic tackifier or low-color hydrogenated hydrocarbon tackifier, 15–20 wt% paraffin wax, and 0.5–1.0 wt% antioxidant. The resulting melt viscosity is typically 700–1,000 mPa·s at 130–150°C per ASTM D3236-15; the low operating temperature is chosen to reduce thermal distortion of 15–30 kg/m³ polyurethane foam. A chrome-plated roll coater at 130–150°C with a roll gap of 50–100 µm applies the adhesive to release paper or directly to foam; nip pressure at the lamination station is set to 0.2–0.5 MPa and open time is limited to 2–5 s because low-density foam absorbs the melt and collapses if the film remains molten beyond 5 s. Peel adhesion after 24 h is measured by ASTM D1876-08 T-peel: values below 2 N/25 mm indicate insufficient substrate fusion, while cohesive failure within the foam is the target failure mode. Emission requirements for mattress interiors are governed by REACH (EC) No 1907/2006 and by voluntary labels such as CertiPUR; the adhesive must not contain dibutyltin or other organotin stabilizers. The low viscosity of PRIMEVA P33400 allows slot-die application at 120–140°C for laminating flame-retardant barrier fabrics to polyurethane foam, but the compound should not be held above 150°C for more than 8 h in an open reservoir because VA degradation produces acetic acid and darkens low-color tackifiers. Final products include flexible polyurethane foam lamination for mattress comfort layers, upholstery seating foam, acoustic foam underlay, and carpet cushion composites.
Spiral spray and melt-blown nonwoven construction adhesives are formulated differently from case sealing adhesives because the polymer content is reduced to lower viscosity and allow air-assisted fiber formation through multi-orifice nozzles at 135–155°C. For disposable hygiene lamination, PRIMEVA P33400 is used in a representative range of 22–28 wt% with 40–48 wt% low-color hydrocarbon tackifier, 18–25 wt% Fischer-Tropsch wax, and 0.5–1.0 wt% antioxidant; the higher wax content is required to depress melt viscosity into the 600–1,000 mPa·s range at 140°C under ASTM D3236-15 and to shorten open time below 1 s on tissue and nonwoven substrates. Spiral spray equipment fitted with 0.3–0.6 mm orifices and compressed air at 0.1–0.4 MPa produces adhesive filaments, not continuous films, which limits bond strength but preserves substrate softness. The adhesive is restricted to low-stress construction bonds in adult incontinence briefs, underpads, and sanitary pad backsheet lamination because EVA-based hot melts have lower elastic recovery and higher creep than SBC-based compounds, making them unsuitable for leg elastics or waistband attachment. Peel strength is tested after 24 h by ASTM D1876-08 with nonwoven tearing as the preferred failure mode. Skin-contact safety for finished hygiene articles is assessed under Regulation (EU) 2017/745 only when the product is a medical device; non-medical disposables must meet REACH (EC) No 1907/2006 SVHC restrictions and the General Product Safety Regulation (EU) 2023/988. Hot-melt filters of 100–200 µm are installed before the applicator to remove char and prevent nozzle blockage during 24 h continuous runs; batch-to-batch melt flow variation of the copolymer should be less than ±10% to maintain consistent fiber diameter. Final products are adult incontinence chassis construction, disposable underpad tissue-to-backsheet lamination, and nonwoven core wrap lamination.
Preheating of the substrate before the nip is decisive when internal wax levels exceed 15 wt% because high wax content shortens open time and raises the risk of premature solidification on unheated MDF or chipboard edges. A PRIMEVA P33400-based profile wrapping compound is usually formulated with 30–35 wt% copolymer, 35–40 wt% modified hydrocarbon tackifier, 15–20 wt% Fischer-Tropsch paraffin wax, 0–5 wt% calcium carbonate filler, and 0.4–0.8 wt% hindered phenolic antioxidant. The thermal balance is narrow: melt viscosity must be 800–1,300 mPa·s at 150°C per ASTM D3236-15 for slot-die transfer, while the wax load must not exceed 20 wt% because cold-flex adhesion under DIN EN 205 or ISO 11339 drops sharply below 10°C and finished profiles can develop bond-line cracking. Slot-die applicators at 150–170°C deposit a film of 80–120 µm onto primed or unprimed PVC, ABS, or veneer web; the MDF/chipboard profile is preheated by infrared lamps to 35–55°C just before the nip, and the wrap line speed is held between 5 m/min and 25 m/min depending on profile radius. Nip rollers with Shore A 70–80 cover and line pressure of 0.3–0.6 MPa consolidate the film; post-nip infrared re-activation is not recommended because excessive heat above 170°C accelerates acetic acid formation from the VA comonomer. Compliance for furniture interior adhesives is dominated by REACH (EC) No 1907/2006 and California CARB 93120 for formaldehyde in the finished board, not for the hot melt itself; the hot melt must not contain substances listed in the EU Candidate List above 0.1 wt%. Final products are MDF picture frames, decorative furniture edge profiles, PVC-wrapped skirting boards, and technical profile wrapping strips.
Automotive interior trim lamination imposes fogging and low-stress adhesion requirements that are not addressed by melt flow index alone. The high flow of PRIMEVA P33400 allows robotic swirl spray at 145–160°C and reduces substrate burn-through on 0.8–1.5 mm polypropylene and polyester substrates, but heat resistance is controlled by wax selection and application thickness rather than by polymer MFI. A typical automotive trim formulation contains 25–30 wt% copolymer, 35–45 wt% aromatic-modified hydrocarbon tackifier, 15–20 wt% synthetic wax, and 0.5–1.0 wt% antioxidant; viscosity at 150°C is targeted at 700–1,100 mPa·s per ASTM D3236-15. Six-axis robotic spray systems apply adhesive through air-assisted swirl nozzles at a distance of 150–250 mm and atomization air pressure of 0.1–0.3 MPa, producing open times from 10 s to 30 s, enough for manual or automated placement of fabric, foam-backed vinyl, or acoustic felt. Surface preparation is required for untreated polypropylene because low surface energy below 38 mN/m prevents wetting; plasma or corona treatment is used on line. Fogging and VOC performance are tested by DIN 75201-B and VDA 278:2011; emissions must be below the OEM-specific limits, and the adhesive must be free of dibutyltin and heavy metals to meet REACH (EC) No 1907/2006 and EU ELV 2000/53/EC. Long-term heat aging at 80–100°C under 2 kPa shear is evaluated by ASTM D3654-06; EVA-based hot melts generally show lower static shear strength than polyamide or PUR systems, so the bond line is limited to non-structural trim, acoustic insulation, and boot mat lamination. Final products are door panel fabric inserts, trunk mat composites, headliner edge wrap, and wheel arch acoustic liners.
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PRIMEVA P33400 is a low-viscosity ethylene-vinyl acetate copolymer resin supplied as transparent or translucent pellets for hot melt adhesive compounding. The grade is specified for packaging, case and carton closing, bookbinding, and filter assembly where fast set and deep substrate wet-out are the primary process requirements. The P33400 designation places the resin in a medium-to-high vinyl acetate comonomer segment; hot melt adhesive grades of this type usually carry a nominal vinyl acetate content near 33 wt% and a melt flow rate controlled under ISO 1133-1:2022 at 190 °C with a 2.16 kg load in the range 350 g/10 min to 450 g/10 min. Because the product is a neat copolymer rather than a finished adhesive, end-use viscosity, open time, and adhesion depend on the tackifier, wax, and antioxidant package selected by the compounder.
The combined melt flow range and VA content position P33400 between low-VA/low-viscosity grades aimed at chipboard and high-VA/high-viscosity grades aimed at difficult plastic films. A starting compound containing 25 wt% to 35 wt% P33400, 40 wt% to 55 wt% C5 or C9 hydrocarbon tackifier, 10 wt% to 20 wt% paraffin or Fischer-Tropsch wax, and 0.5 wt% to 1.0 wt% hindered phenolic antioxidant typically produces a Brookfield viscosity of 1,200 mPa·s to 3,500 mPa·s at 170 °C under ASTM D3236-15. The neat resin contributes a DSC melting endotherm peak of 62 °C to 67 °C under ISO 11357-3:2018, while the compounded formulation exhibits a ring-and-ball softening point of 90 °C to 105 °C under ASTM E28-99. The melt flow range is narrow enough to reduce gear pump slippage and broad enough to tolerate normal weighing variance during wax addition. A low viscosity at application temperature promotes flow into compressed corrugated liners, but the same low viscosity lowers cohesive strength above ambient service temperature. The selection of wax type changes the shear-thinning response: Fischer-Tropsch wax increases shear thinning above 20 wt%, whereas a paraffin wax with a narrow carbon distribution produces a more Newtonian melt but shortens open time.
| Property | Test designation | Typical band |
|---|---|---|
| Melt flow rate, 190 °C/2.16 kg | ISO 1133-1:2022 | 350 g/10 min–450 g/10 min |
| Vinyl acetate content | ISO 8985:2012 | 32 wt%–34 wt% |
| Density at 23 °C | ISO 1183-1:2019 | 0.950 g/cm³–0.970 g/cm³ |
| DSC melting endotherm peak | ISO 11357-3:2018 | 62 °C–67 °C |
| Ring-and-ball softening point of compounded adhesive | ASTM E28-99 | 90 °C–105 °C |
| Brookfield viscosity of compounded adhesive at 170 °C | ASTM D3236-15 | 1,200 mPa·s–3,500 mPa·s |
Batch-specific values should be read from the supplier certificate of analysis. The melt flow rate tolerance on an individual lot is commonly ± 10% of the nominal target; a lot above 470 g/10 min may require wax reduction or polymer increase to limit excessive penetration into low-density paperboard. Published data for this specific configuration is limited, and the band reflects standard low-viscosity EVA hot melt adhesive class data rather than an exhaustive multi-plant interlaboratory study.
Adhesive formulations based on P33400 are compounded in a two-step sequence. The resin, tackifier, and antioxidant are melted at 150 °C to 160 °C under low-shear agitation; wax is added last at 140 °C to 150 °C to limit thermal stress. The low melt viscosity of the base resin permits mixing at 30 rpm to 60 rpm in a jacketed mixer without exceeding 170 °C; high-shear dispersion is not required because the copolymer and hydrocarbon tackifiers form a compatible melt. At addition levels above 30 wt%, open time on clay-coated board increases, while above 35 wt% viscosity build and formulation cost can outweigh cohesive-strength gains. Replacing 1.0 wt% paraffin wax with 2.5 wt% microcrystalline wax shifts the softening point by no more than 3 °C in most standard formulations. If the tackifier source contains residual tall oil fatty acid, the melt should be held below 175 °C to minimize acid-catalyzed degradation of the EVA backbone. Cloud point in paraffin wax is normally observed between 105 °C and 120 °C; processing below the cloud point increases the risk of phase separation and uneven coat weight.
PRIMEVA P33400-based hot melts are typically run from shallow melt reservoirs at 160 °C to 170 °C with gear pump or piston pump delivery. Melt temperatures above 180 °C should be avoided when the formula contains hydrocarbon tackifier and paraffin wax; hold times beyond 6 h at 178 °C can generate skinning and char on tank walls. A 500 mm slot die applying a 120 g/m² coat weight may show pressure drop below 45 bar when melt viscosity is held between 1,500 mPa·s and 2,500 mPa·s; if pressure exceeds 60 bar, the cause is usually an undersized heated hose or partially degraded gel rather than the resin melt flow. Roll applicator gaps of 0.2 mm to 0.5 mm and compression of 0.5 s to 1.0 s are common for corrugated case sealing. On a 300 mm drum applicator assembling case blanks at 90 m/min, open time must remain below 5 s to prevent board slippage at the compression section. Line operators should monitor tank skinning at the air-adhesive interface and use stainless steel 316L reservoirs because acetic acid released from overheated EVA will attack brass and copper fittings. Heated hose setpoints should be offset from the tank setpoint by no more than 5 °C to prevent localized char at the die inlet.
Compared with a standard high-viscosity EVA hot melt grade having melt flow rate below 100 g/10 min, P33400 provides lower neat melt viscosity and better flow into compressed corrugated liners. The trade-off is reduced cohesive strength at elevated temperature. In T-peel testing under ASTM D1876-08, a P33400 formulation may exhibit fiber tear on corrugated board at 23 °C but adhesive failure above 55 °C; a high-viscosity EVA formulation may retain fiber tear to 65 °C. The low-viscosity grade is therefore appropriate for beverage carton closing, case sealing, and paperboard overwrap at ambient service temperatures. It should not be selected for hot-fill packaging or interior trim where sustained heat load exceeds 50 °C.
| Parameter | PRIMEVA P33400 | High-viscosity EVA |
|---|---|---|
| Neat resin melt flow rate, 190 °C/2.16 kg | 350 g/10 min–450 g/10 min | 5 g/10 min–100 g/10 min |
| Recommended application temperature | 160 °C–170 °C | 170 °C–190 °C |
| Open time on clay-coated board | 2 s–8 s | 5 s–20 s |
| Cohesive strength above 55 °C | Limited; adhesive failure possible | Higher; may retain fiber tear to 65 °C |
| Primary substrate set | Porous paperboard, corrugated, nonwovens | Plastic films, high-stress packaging, elevated heat exposure |
Against metallocene-catalyzed polyolefin hot melt grades, P33400 EVA is denser and can be more sensitive to thermal degradation when exposed to residual acid catalysts from tall oil fatty acid tackifiers. Against amorphous poly-alpha-olefin grades, it provides faster set speed and higher green strength on cardboard but lower low-temperature flexibility; joints that must flex at -20 °C usually require plasticizer or a lower-crystallinity alternative. Against ethylene-acrylate copolymers, P33400 gives lower adhesion to untreated polyethylene film unless the substrate is corona-treated to a minimum surface energy of 38 mN/m. Unlike reactive polyurethane hot melts, it does not require moisture to cure and has no opened-tool shelf life, but it also lacks the thermoset strength and solvent resistance of a fully cured polyurethane network. Against solventborne or waterborne adhesives, the hot melt formulation offers immediate load-bearing green strength and eliminates drying ovens, but it retains a thermoplastic service temperature limit.
At processing temperatures of 160 °C to 170 °C, the melt is stable for 4 h to 6 h in an open tank when the antioxidant level is maintained and the adhesive is not recirculated through an unblanketed hopper. Above 190 °C, thermal decomposition can release acetic acid vapor, which corrodes brass and copper fittings; stainless steel 316L tanks, hoses, and nozzles are preferred. Pre-drying is not normally required because moisture absorption at 23 °C and 50% relative humidity is below 0.1 wt%, but at relative humidity above 60% and long open storage, surface condensation should be removed by warm-air conveying before melt mixing. Regulatory compliance must be confirmed against REACH EC 1907/2006, RoHS 2011/65/EU, and food-contact migration testing under FDA 21 CFR 177.1350 or EU Regulation 10/2011; the neat resin does not confer food-contact approval because the tackifier, wax, and antioxidant also contribute to the migration profile. For applications involving fatty food simulants, the compounded adhesive must be evaluated at the actual use temperature and contact area, because migration kinetics in a low-viscosity EVA matrix are not controlled by softening point alone.
Bookbinding adhesives formulated with P33400 are typically applied at 160 °C to 170 °C by nozzle or roller at coat weights of 150 g/m² to 250 g/m². The low melt viscosity permits penetration into uncoated paper fibers and forms a flexible adhesive film that withstands repeated page flexing. A 100 mm nozzle slot depositing 180 g/m² onto uncoated book paper usually shows open time of 3 s to 6 s and set time below 2 s with water-cooled nipping. This set speed supports binding lines above 80 m/min without blocking. Filter assembly using polyester nonwoven media uses the same penetration behavior, but the final adhesive should be qualified for pleat tip stiffness and pressure-drop stability under the equipment maker’s production protocol.
