| HS Code | 894556 |
| Product | SINOPEC EVA 14F1 |
| Chemical Family | Ethylene-Vinyl Acetate (EVA) Copolymer |
| Va Content | 14 wt% |
| Melt Flow Rate | 1.8 g/10min (190°C/2.16kg) |
| Density | 0.935 g/cm³ |
| Melting Point | 88°C |
| Vicat Softening Temperature | 65°C |
| Tensile Strength | 22 MPa |
| Elongation At Break | 650% |
| Shore A Hardness | 93 |
| Brittle Temperature | -70°C |
| Film Grade | Yes |
As an accredited SINOPEC EVA 14F1 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SINOPEC EVA 14F1 is packaged in 25 kg net polyethylene-lined kraft bags, palletized and shrink-wrapped for safe storage and transport. |
| Container Loading (20′ FCL) | 20′ FCL shipment of SINOPEC EVA 14F1, palletized bags securely loaded, protected from moisture and damage for safe transit. |
| Shipping | SINOPEC EVA 14F1 ships as ethylene-vinyl acetate copolymer resin pellets in 25 kg bags on pallets. It is non-hazardous, but should be kept dry, away from heat and direct sunlight. Use ventilated containers, avoid compression damage, and store in a cool, clean warehouse. |
| Storage | Store SINOPEC EVA 14F1 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep packages sealed in original containers to prevent moisture absorption and contamination. Avoid exposure to strong oxidizers and UV radiation. Maintain moderate temperatures to preserve resin quality and prevent degradation. |
| Shelf Life | Shelf life: 12 months from production if stored in a cool, dry, well-ventilated area away from direct sunlight. |
Material baseline. SINOPEC EVA 14F1 is specified with nominal vinyl acetate incorporation of 14 wt% and melt flow rate of 1.0 g/10 min measured at 190 °C under 2.16 kg load per ISO 1133-1:2022. Density is typically handled as 0.935 g/cm³ under ASTM D1505. Tensile data are generated under ASTM D638; converter validation remains necessary for each downstream blend. Compliance status is tied to FDA 21 CFR 177.1350, REACH, and RoHS only where the full formulation meets the corresponding substance restrictions and end-use conditions. The low vinyl acetate content limits polar-substrate adhesion and low-temperature flexibility compared with 28 wt% VA grades, while the low melt index contributes higher melt strength and reduced thin-wall flow length.
Extrusion of agricultural greenhouse film using EVA 14F1 as a modifying resin is performed on high-L/D blown-film lines. The low melt index supports bubble stability but requires a grooved-feed throat and barrel temperatures from 150 °C to 175 °C. A three-layer cover formulation typically places 15–30 wt% EVA 14F1 in the skin or core layer with 70–85 wt% LDPE/LLDPE, 0.3–0.5 phr hindered-amine light stabilizer, 0.5–1.0 phr anti-fog concentrate, and 0–0.2 phr slip/antiblock masterbatch. Die temperature is maintained between 165 °C and 180 °C, blow-up ratio 2.0–2.8, frost-line height 800–1,000 mm on a 1,200 mm die, and film thickness from 80 μm to 200 μm. Anti-fog additive migration kinetics to the film surface are influenced by VA content and layer thickness; accelerated weathering is assessed under ISO 4892-2. At addition levels above 40 wt%, roll blocking and die-lip build-up become measurable; converter storage trials at 30 °C and 70% RH are required before multi-season use. Mechanical acceptance for greenhouse film is measured by ASTM D1709 dart impact and ASTM D882 tensile, with haze and light transmittance tracked under ASTM D1003. Food-contact greenhouse covers with direct crop contact should not be claimed under FDA 21 CFR 177.1350 unless the complete layer structure and all additives are validated for the intended contact duration and temperature.
In crosslinked closed-cell EVA foam, EVA 14F1 is formulated at 100 phr with azodicarbonamide at 2.0–3.5 phr, dicumyl peroxide at 0.6–0.9 phr, zinc oxide at 0.8–1.2 phr, zinc stearate at 0.5–1.0 phr, and calcium carbonate filler from 0–15 phr depending on target hardness. The process conflict lies in overlapping thermal windows: azodicarbonamide decomposition accelerates above 150 °C, while dicumyl peroxide at 0.7 phr delivers practical crosslinking in the 160–170 °C range. Two-roll mill compounding is therefore held at 100–110 °C roll surface temperature and 0.3–0.5 mm nip gap to avoid premature gas evolution and scorch. Compression molding is run at 160–175 °C with 120–150 kg/cm² pressure and 8–12 min cure time per 10 mm preform thickness. Density is controlled between 0.08 g/cm³ and 0.15 g/cm³; lower-density targets require higher azodicarbonamide loading but raise the risk of cell coalescence and surface blisters. Moisture content of the premixed compound must be below 0.05 wt% before molding. Crosslinking kinetics are monitored by gel content under ASTM D2765 method A; values below 60% indicate undercure and can produce compression-set failure. Foam mechanical properties are testable under ASTM D3575 and ISO 1798, with compression set under ASTM D395 method B. Terminal products include shoe midsoles, exercise mats, expansion joint fillers, and thermal insulation pipe sleeves. Published data for this specific EVA 14F1 density-to-hardness mapping is limited; each converter must establish its own mold-pressure and cure-time curve.
Hot melt compounding with EVA 14F1 uses the low melt index as a viscosity builder rather than relying only on high-molecular-weight wax. A standard high-viscosity packaging formulation contains 30–40 wt% EVA 14F1, 35–50 wt% rosin ester tackifier with softening point 90–110 °C, 15–25 wt% Fischer-Tropsch wax, and 0.5–1.0 wt% hindered phenolic antioxidant. Mixing is completed in a heated sigma-blade kneader at 160–180 °C under nitrogen blanketing. Oxygen exclusion is critical because vinyl acetate groups at 14 wt% can undergo chain scission and discoloration at extended residence times above 180 °C. Application viscosity is determined by ASTM D3236 at 180 °C, with adjustability through wax level. Adhesion is tested under ASTM D1876 T-peel on high-density polyethylene and corrugated board. Lacquered MDF or coated paper substrates may require an adhesion primer or a higher-VA EVA grade. Terminal uses include carton side-seam adhesives, bookbinding, edge banding, and deep-freeze packaging where application temperature remains tolerable. The low VA content limits open-time stability on polar substrates; published data for this specific configuration in high-speed packaging lines is limited.
Compounding of low-smoke halogen-free sheathing compounds uses EVA 14F1 as a filler-accepting polymer modifier. A practical base compound consists of 25–35 wt% EVA 14F1, 5–15 wt% LLDPE, 55–65 wt% silane-treated magnesium hydroxide, 0.5–1.0 wt% antioxidant, and 0.5–1.0 wt% processing aid. Compounding is run on a co-rotating twin-screw extruder with 40:1 L/D, side-fed mineral filler at barrel 7, and barrel temperatures from 140 °C to 170 °C. The melt temperature at the die plate must remain below 180 °C to prevent surface oxidation and pre-crosslinking. Cable extrusion on a single-screw line uses a compression screw with 24:1 L/D and melt temperature 150–165 °C. Flame performance is verified by IEC 60332-1-2, smoke density by IEC 61034-2, and acid gas evolution by IEC 60754-2; oxygen index above 30% under ASTM D2863 is typical for this filler loading. Terminal products are building wire sheathing, control cable jackets, and transit power cable compounds. The 14 wt% VA content does not provide the cold flexibility of 28 wt% VA grades; cold impact and bend at low temperature must be validated under IEC 60811-506 before specification for exterior installations.
| Downstream zone | Governing standard | Operational boundary |
|---|---|---|
| Blown greenhouse film | ASTM D1709, ASTM D882 | EVA loading 15–30 wt%; die temperature 165–180 °C |
| Crosslinked closed-cell foam | ASTM D3575, ISO 1798 | Mold temperature 160–175 °C; moisture <0.05 wt% |
| Hot melt adhesive | ASTM D3236, ASTM D1876 | Kneader temperature 160–180 °C; nitrogen blanketing |
| LSZH cable sheathing | IEC 60332-1-2, IEC 60754-2 | Die plate <180 °C; MDH loading 55–65 wt% |
| Masterbatch carrier | ASTM D2244, ISO 18314-1 | Twin-screw 36:1–44:1 L/D; die melt <200 °C |
Compounding of masterbatch using EVA 14F1 as carrier resin is executed on a co-rotating twin-screw extruder with 36:1–44:1 L/D and vacuum venting at barrel 8. The formulation typically loads 50–60 wt% carrier, 30–40 wt% pigment or functional additive, and 0–2 wt% external lubricant. Screw speed is held between 300 rpm and 500 rpm; temperature zones range from 120 °C at the feed throat to 180 °C at the die plate. High-shear dispersion is essential for color strength and filterability. The low melt index of 1.0 g/10 min generates significant shear heating, so melt temperature is monitored by an infrared sensor at the die and kept below 200 °C. Dispersion quality is assessed under ISO 18314-1 for colorimetric coordinates and ASTM D2244 for color difference; filter pressure value can be measured with a 14 μm screen pack as an internal control. Terminal products are polyolefin color masterbatch for blown film, sheet extrusion, and injection molding. Food-contact masterbatch status under FDA 21 CFR 177.1350 requires each pigment and additive to independently meet the same regulation; carrier compliance alone is not sufficient.
For injection molding of semi-flexible closure and grip components, EVA 14F1 is processed on a reciprocating-screw machine with 20:1–24:1 L/D and a general-purpose polyolefin screw. Melt temperature is set from 180 °C to 200 °C, mold temperature 20–40 °C, injection pressure 80–120 MPa, and holding pressure 60–80 MPa. The low melt index restricts flow length; wall thickness below 1.5 mm is not recommended without fast injection and hot runner manifold temperatures above 190 °C. Part acceptance is based on ASTM D638 tensile specimens machined from plaques, ASTM D2240 Shore A hardness, and ASTM D412 for elastomeric behavior. Terminal components include appliance feet, anti-skid pads, protective caps, and flexible automotive interior clips. Drying is required when exposure to 60% RH or higher for more than 24 h has occurred; a desiccant dryer at 60–70 °C for 4 h reduces surface splay. Published data for this specific grade in thin-wall injection molding is limited; mold-flow analysis should be calibrated with actual melt-temperature and pressure-transducer data.
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Ethylene-vinyl acetate copolymer grade SINOPEC EVA 14F1 is a high-pressure random copolymer supplied for blown-film and cast-film conversion. The grade identifier encodes two primary property separators: nominal vinyl acetate incorporation of 14 wt% and a film-extrusion melt mass-flow rate of 1.0 g/10 min when determined at 190°C under a 2.16 kg load by ISO 1133-1:2022. Density at 23°C is approximately 0.934 g/cm³ under ISO 1183-1, and the melting temperature is approximately 92°C by ISO 3146. The comonomer is incorporated as a random acetate side group along the polyethylene backbone; this reduces crystalline order relative to LDPE and imparts lower seal initiation temperature, improved low-temperature toughness, and higher surface polarity. The 1.0 g/10 min melt index positions the grade for heavy-gauge film rather than high-speed thin-gauge coating, because higher viscosity improves bubble stability but limits melt extensibility. The product is supplied as translucent pellets and is typically converted in heavy-duty sacks, frozen-food packaging, agricultural cover films, and coextruded sealant layers.
Before extrusion, incoming lots are commonly screened by Fourier-transform infrared spectroscopy for vinyl acetate content, melt flow rate by ISO 1133-1:2022, density by ISO 1183-1, and differential scanning calorimetry by ISO 11357-3 to confirm the melting endotherm. Batch-to-batch variation in vinyl acetate content of even ±1 wt% can shift seal initiation temperature and blocking behaviour; certificates of analysis should be retained for lot traceability. The acetate group is thermally labile, and storage above 40°C or prolonged exposure to UV can prematurely discolour pellets and generate acetic acid odour. Warehousing in a dry, shaded environment below 40°C is recommended. Moisture pick-up is generally low, but bags opened under high relative humidity can develop surface moisture; if bubble pinholes or surging occur, pre-drying at 60°C for 2–4 h in a desiccant or hot-air dryer is sufficient. Resin that has been allowed to reach >60% RH for extended periods should be dried before use to avoid hydrolysis at processing temperatures.
Melt processing of 14F1 is bounded primarily by the thermal stability of the acetate substituent, not by the crystalline melting point. Above approximately 230°C, deacetylation accelerates, releasing acetic acid, producing gel particles, brown specks, and acidic plate-out on die lips. The degradation products are corrosive to unplated carbon steel and can etch chrome-plated surfaces over sustained campaigns. On production-scale blown-film lines with single-screw extruders of L/D 30–36 and screw diameters from 45 mm to 90 mm, start-up profiles typically use feed-zone temperatures of 120–140°C, compression-zone temperatures increasing from 160°C to 200°C, and adapter/die zones at 200–215°C. Melt temperature measured at the adapter should remain below 220°C; excursions above 230°C for more than several minutes are associated with die-lip build-up and loss of melt strength. The low melt index of 1.0 g/10 min generates higher melt pressure than LDPE film grades of 1.8–2.5 g/10 min; extruders with shallow-grooved feed sections or undersized motors may exhibit screw-speed limits, feed starvation, or high melt-pressure alarms before the desired throughput is reached. Chrome-plated screws, bimetallic barrels, and stainless-steel die lips are standard corrosion-control measures.
Blown-film conditions are normally set with blow-up ratios between 2.0:1 and 3.0:1 and die gaps from 0.8 mm to 1.5 mm. Increasing the die gap raises melt residence time and output but can increase gel formation if melt temperatures are not adjusted. Frost-line height is maintained at a level that balances bubble stability and impact toughness; an excessively high frost line increases crystallinity and reduces dart drop impact. In cast-film and extrusion-lamination lines, melt temperatures can be held at 200–210°C, but draw resonance appears more readily than in LDPE because the lower melt strength of the acetate-containing chain reduces extensional viscosity. Die-lip deposits are controlled by periodic purging with a low-MFI LDPE or a commercial polyolefin purging compound. Shutdowns should avoid extended hold times above 180°C; stagnant melt degrades quickly in dead zones and discolours during restart.
Producer technical literature for SINOPEC EVA 14F1 reports the typical property envelope shown in Table 1. These values are indicative for incoming quality assessment and should not replace the supplier certificate of analysis for lot-specific release limits.
| Property | Test method | Nominal value |
|---|---|---|
| Vinyl acetate content | Internal FTIR or saponification | 14 wt% |
| Melt mass-flow rate | ISO 1133-1:2022 | 1.0 g/10 min |
| Density at 23°C | ISO 1183-1 | 0.934 g/cm³ |
| Tensile stress at break | ISO 527-3 | 18 MPa |
| Elongation at break | ISO 527-3 | 700% |
| Vicat softening temperature A/50 | ISO 306 | 84°C |
| Melting temperature | ISO 3146 | 92°C |
The property combination differentiates 14F1 from LDPE film grades of similar melt index: the vinyl acetate units depress Vicat softening and melting point, reduce tensile modulus, and increase elongation at break. The material retains more stiffness and crystallinity than conventional 18–28 wt% VA copolymers, making it easier to handle in thin films and less prone to blocking in warehouse rolls. The 1.0 g/10 min MFR is suited to heavy-gauge bubble stability; converters requiring higher output on narrow-gap film lines may blend with LDPE or LLDPE to raise melt flow and reduce backpressure.
Replacing a portion of LDPE with 14F1 in a blown-film sealant layer reduces the heat-seal initiation temperature by disrupting crystallinity at the sealing interface. Seal initiation is commonly evaluated by ASTM F88/F88M or by internal peel methods referenced to ISO 527-3; the absolute reduction depends on dwell time, seal bar temperature, and film gauge. In blown-film trials, addition of 20–30 wt% 14F1 to an LDPE-rich formulation lowers seal initiation by approximately 10–20°C relative to the LDPE control, although published data for this specific blend ratio is limited. The same structural change raises low-temperature puncture and dart impact resistance; films are tested under ISO 7765-1 or ASTM D1709 Method A/B. The resin’s vinyl acetate units also increase surface polarity, improving ink wetting and lamination bond without corona treatment, but water-vapour transmission rate increases relative to a nonpolar LDPE of comparable crystallinity.
Compared with a typical LDPE film grade, 14F1 has a lower Vicat softening temperature, lower tensile modulus, and higher elongation at break. These differences are attributable to reduced lamellar thickness and lower crystallinity. Processors should not use 14F1 as a direct drop-in for LDPE in high-stiffness applications; the stiffness loss must be compensated by blending with HDPE or by increasing film gauge. The melt index of 1.0 g/10 min is lower than many commodity LDPE film grades, which increases backpressure and may reduce throughput on older extruders, but improves bubble stability in thick-gauge sacks and heavy-duty shipping bags. In coextruded structures, 14F1 is frequently placed in the sealant or core layer, while LDPE or HDPE skins provide stiffness and blocking resistance.
Three-layer greenhouse and tunnel films using 14F1 as the core layer exploit the higher infrared absorption of vinyl acetate sequences to reduce nocturnal heat loss. The effect is concentration-dependent, gauge-dependent, and influenced by anti-drip and anti-dust surface treatments. Quantified infrared retention data for SINOPEC 14F1 in specific greenhouse structures is limited in publicly available technical literature, so validation should use thermal transmittance measurements under EN 673 or field comparison with an LDPE control of identical thickness and additive package. Light transmission in the photosynthetically active radiation range is evaluated with ASTM D1003 or ISO 13468-2; film haze is controlled by die temperature, frost-line height, and dispersion of inorganic anti-block. In agricultural film, incorporation of 14F1 improves low-temperature flexibility and impact resistance, reducing film failure at folds and attachment points during winter installation.
The same polarity that improves infrared retention also attracts dust and reduces light transmission over time in arid regions unless anti-dust or anti-fog additives are included. Additive packages containing strongly basic amines should be tested for compatibility because base-catalysed ester hydrolysis can increase deacetylation and shorten film life. Long-term aging is assessed by ISO 4892-2 accelerated weathering or multi-season field exposure; 14F1 requires UV stabilisation at loadings appropriate for the intended exposure period.
Substitution of 14F1 for an 18–28 wt% VA copolymer in foam, hot-melt, or high-adhesion extrusion coating is not a direct replacement. The lower acetate fraction raises melt viscosity, raises Vicat softening, reduces adhesion to polar substrates, and limits foam expansion at low density. In extrusion coating on aluminium foil or paper, peel adhesion should be measured by ASTM F904 or a substrate-specific peel standard; 14F1 typically develops less fibre tear than an 18 wt% VA grade at equivalent coating weight. Where a seal initiation temperature below 85°C is required, 14F1 may be unsuitable without blending with a higher-VA copolymer or plastomer. Conversely, for blown-film packaging and agricultural applications, 14F1 offers better blocking resistance and faster line start-up than higher-VA grades because the lower acetate content reduces tack, lowers melt adhesion to metal surfaces, and widens the available processing window before deacetylation becomes significant. The material is also less dependent on slip and anti-block additives, although such additives remain necessary in thin-gauge films.
Regulatory compliance for food contact must be verified for the specific formulation and converting conditions. Ethylene-vinyl acetate copolymers may be evaluated under FDA 21 CFR 177.1350 or Regulation (EU) No 10/2011, with migration testing according to EN 1186 and the specific migration methods referenced in the applicable regulation. Industrial use is typically addressed through REACH registration and RoHS restricted-substance screening. No conclusion regarding global food-contact approval is implied by the property data alone.
