| HS Code | 296068 |
| Product | EVOH EVAL F101A |
| Polymer Type | Ethylene vinyl alcohol copolymer |
| Ethylene Content | 32 mol% |
| Form | Pellets |
| Density | 1.19 g/cm³ |
| Melt Flow Rate | 1.6 g/10 min (190°C, 2.16 kg) |
| Melting Point | 183°C (DSC) |
| Crystallization Point | 164°C |
| Glass Transition Temperature | 62°C |
| Oxygen Permeability | 0.3 cm³·20 µm/m²·day·atm at 20°C, 65% RH |
| Tensile Strength At Break | 60 MPa (film) |
| Elongation At Break | 300% (film) |
As an accredited EVOH EVAL F101A factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVOH EVAL F101A is supplied in 25 kg sealed polyethylene-lined paper bags, ensuring moisture protection and safe handling. |
| Container Loading (20′ FCL) | 20′ FCL loaded with EVOH EVAL F101A resin, packed in 25kg bags on pallets, safely secured for transport. |
| Shipping | EVOH EVAL F101A is a thermoplastic ethylene-vinyl alcohol copolymer resin supplied as moisture-sensitive pellets. Ship in sealed, vapor-proof packaging to prevent humidity absorption. Store cool and dry, away from direct sunlight. It is not classified as dangerous goods for transport, but standard industrial hygiene and dust control should be maintained. |
| Storage | Store EVOH EVAL F101A in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and ignition. Keep the original container tightly sealed to prevent moisture absorption and contamination. Avoid contact with oxidizing agents. Follow standard resin handling guidelines; use within recommended shelf life for optimal performance. |
| Shelf Life | EVOH EVAL F101A has a shelf life of one year when stored unopened in a cool, dry place away from moisture and sunlight. |
| Jurisdiction | Reference | Test endpoint | Application limitation |
| European Union | EU 10/2011 | Total migration 10 mg/dm² by EN 1186-1 | EVOH buried behind food-contact polyolefin |
| European Union | EU 10/2011 | Specific migration by EN 1186-14 | Verify on finished laminate |
| United States | Supplier FCN statement | Polymer specification and residual monomer | Grade-specific; confirm with current certificate |
| Barrier validation | ASTM D3985 | OTR at 23°C/0% RH | Not valid for high-humidity outer layers |
Interfacial instability in six-layer fuel-tank accumulator-head blow moulding originates from the mismatch between EVOH F101A and HDPE melt elasticity, not solely from melt viscosity. The EVOH layer is targeted at 80–150 µm within a nominal wall thickness of 6 mm, representing 1.5–3.0% of the wall. The structure is HDPE / maleic anhydride grafted HDPE tie / EVOH / tie / HDPE regrind / HDPE. Extruder barrels for the EVOH are specified with 24:1 L/D and profile temperatures from 180°C in the feed zone to 225°C at the die adapter. The HDPE layers are processed at 220–240°C. When the die head temperature exceeds 230°C, the EVOH layer loses interfacial sharpness and forms wavy inclusions detectable as cloudy bands in cross-section. The failure is intensified by reprocessed HDPE if the regrind contains oxidised polyolefin, which raises die-swell variance. Processors therefore limit regrind to 30 wt% and maintain the accumulator drop speed below 0.7 m/s. Pre-drying of EVOH exposed to ambient air above 60% RH for more than 2 h is performed at 90°C for 3–4 h with a desiccant hopper dew point of −40°C. Cumulative residence time above 240°C should not exceed 10 min because cross-linking gels form. The finished tank is conditioned at 23°C/50% RH for 48 h before permeation testing against SAE J1737 or the vehicle manufacturer’s procedure. Fuel permeation requirements are set by regional evaporative emission regulations; published data for a specific tank geometry is limited and must be established by the moulder. End products are multilayer high-density polyethylene fuel tanks for gasoline and gasoline-ethanol blends. Delamination is checked after thermal shock cycling from −40°C to 60°C, using cross-section microscopy at 100×.
Because oxygen transmission through EVOH F101A rises under retort humidity while the polymer is still inside the sealed pouch, converters select this grade only after calculating post-retort barrier at the final product water activity. The layer construction is typically biaxially oriented PET / ester-based adhesive / EVOH film / ester-based adhesive / cast polypropylene, with the EVOH core at 10–15 µm in a 150–200 µm laminate. The retort process exposes the pouch to 121°C for 30 min under overpressure; the cast polypropylene layer delays water migration during heating, but the EVOH core can still absorb moisture from the adhesive and the product side. Post-retort oxygen transmission at 23°C/50% RH is therefore measured after 24 h conditioning and is typically higher than the pre-retort value by a factor of 2–5, depending on laminate thickness and retort dwell. The EVOH film is produced on a separate blown-film line and is not laminated above 70°C to avoid shrinkage-induced registration errors. Adhesion is validated by peel testing after retort, and seal strength is tested under ASTM F88 with a minimum of 25 N/25 mm for many ready-meal specifications. This structure is used for retorted sauces, pet foods, and ready meals where oxygen ingress limits shelf life. The grade complies with EU 10/2011 when buried behind the food-contact polypropylene layer, but migration testing must be repeated on the finished laminate after retort because thermal treatment changes reaction products in adhesives.Blown-film coextrusion of LLDPE/tie/EVOH/tie/LLDPE produces a flexible tarp at total thickness 100–150 µm, with the EVOH core limited to 5–8 µm. The oxygen barrier reduces emission of fumigants such as 1,3-dichloropropene and chloropicrin through the film during soil treatment. Die diameter is commonly 250 mm, with a blow-up ratio of 2.0:1 to 2.3:1 and a frost-line height of 500–900 mm. Because the tarp is exposed to field moisture, the EVOH layer must be fully buried; surface exposure causes plasticisation and loss of barrier. Lay-flat width and thickness variation are controlled to ±5% because thin spots emit fumigant and may fail regulatory chamber flux testing. The finished tarp is cut into field sections and installed over treated soil. Emission reduction values depend on soil type, fumigant solubility, and tarp edge sealing; published data for this specific EVOH grade in field fumigation is limited. End products are high-barrier tarps used under approved fumigant label requirements in California and other regulated regions.
EVAL F101A enters cosmetic packaging as a separate blown EVOH film or as a coextruded PE/tie/EVOH/tie/PE web that is laminated into the tube sleeve. The EVOH layer is 15–25 µm in a total sleeve wall of 280–350 µm. Ester-based polyurethane adhesives are used to bond the web to the outer printed PE film and the inner PE contact layer. Residual moisture in the adhesive can migrate into the EVOH, causing local haze and oxygen-barrier loss at the side seam; the adhesive therefore requires drying to a residual solvent level below 5 mg/m² and a coating weight of 3–5 g/m² dry. Corona treatment of the EVOH web before lamination is set to 40–44 mN/m to avoid pinholes. The tube side seam is heat-sealed at 160–180°C with 0.5–0.8 s dwell; overheating above 200°C discolors the EVOH layer. End products are barrier tubes for cosmetic creams, toothpastes, and topical formulations. Migration compliance is assessed under EU 10/2011 and, for cosmetic products, under EC 1223/2009 only for the finished tube, not for the EVOH grade directly.
For oxygen-sensitive diagnostic reagents, the conversion of EVAL F101A into a barrier pouch is controlled by incoming moisture content and cleanroom handling. The resin is extruded into a three-layer LDPE/tie/EVOH film at 6–10 µm EVOH thickness, then fabricated into pouches under ISO 14644-1 class 8 or better. The film is not reused after startup because gels from the die lip can shed into the web. Sterilization by gamma irradiation at 25–40 kGy causes a measurable increase in yellowness index under ASTM E313 and a reduction in elongation at break under ASTM D882; the oxygen barrier after irradiation should be revalidated under ASTM D3985 if the product requires a long shelf life. Sealing is performed at 150–170°C with 0.7–1.0 s dwell, and seal strength is tested under ASTM F88. End products include overwrap for oxygen-sensitive diagnostic reagents and medical device components. Packaging validation follows ISO 11607 for sterile barrier systems; the EVOH film is classified as a barrier layer and not as a sterile barrier by itself.A bag-in-box liner made of LDPE/EVOH/LDPE at 8–12 µm EVOH thickness is used for oxygen-sensitive acidic concentrates with fill temperatures between 40°C and 70°C. Unlike metallised PET, the EVOH liner retains transparency and flex-crack resistance, but its oxygen barrier is sensitive to moisture in the product. For acidic sauces, the inner LDPE layer limits direct acid contact and water transmission, but hot filling above 70°C accelerates moisture uptake and can collapse the barrier before cooling, as measured by oxygen transmission under ASTM D3985. The blown film process uses a die temperature of 220–230°C and a blow-up ratio of 2.0:1 to 2.5:1. The finished bag is flex-tested and then measured for oxygen transmission at 23°C/50% RH; resistance to flex cracking is critical for liquid movement during transport. End products are liners for tomato pastes, fruit concentrates, and post-mix syrup. Migration testing for acidic food simulants is performed under EU 10/2011 with 3% acetic acid as the simulant, using EN 1186-1 total migration and EN 1186-14 specific migration.
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EVAL F101A is an ethylene-vinyl alcohol copolymer with a nominal ethylene content of 32 mol% and a melt mass-flow rate of 1.0 g/10 min when determined at 190 °C under a 2160 g load according to ISO 1133-1:2022. The resin is supplied as cylindrical pellets and is intended for coextruded oxygen-barrier layers in films, sheets, bottles, and tubes. In dry conditions, the hydroxyl-rich vinyl alcohol segments form a hydrogen-bonded barrier that exhibits oxygen permeability values below 0.2 cm³·20 μm/(m²·day·atm); as relative humidity rises, water molecules intercalate into the amorphous phase and oxygen transmission increases. This humidity sensitivity is a defining operational boundary for all low-ethylene EVOH grades.
Specification data for F101A are normally generated under standardised test conditions. Melt flow rate should not be interpreted as a direct processing parameter for all coextrusion lines because EVOH rheology is moisture-sensitive; pellets equilibrated above 0.2 wt% residual moisture can exhibit apparent viscosity shifts. The density of 1.17 g/cm³ measured under ISO 1183-1:2019 places the grade between polyolefin tie resins and polyamide barrier resins, which has consequences for layer thickness distribution in blown-film dies and cast-film feedblocks.
| Property | Test method | Typical value | Unit |
|---|---|---|---|
| Melt mass-flow rate, 190 °C, 2160 g | ISO 1133-1:2022 | 1.0 | g/10 min |
| Density | ISO 1183-1:2019 | 1.17 | g/cm³ |
| Ethylene content | Manufacturer internal method | 32 | mol% |
| Glass transition temperature, dry | ISO 11357-2 | 58 | °C |
| Melting temperature | ISO 11357-3 | 183 | °C |
| Oxygen transmission rate, 20 μm, 20 °C, 65% RH | ISO 15105-2 | 0.17 | cm³/(m²·day·atm) |
| Oxygen transmission rate, 20 μm, 20 °C, 85% RH | ISO 15105-2 | 0.70 | cm³/(m²·day·atm) |
Oxygen transport through EVOH is governed by free-volume fluctuations in the amorphous phase. The dry glass transition temperature of approximately 58 °C reflects the stiffening effect of hydrogen bonding. Under high humidity, absorbed water acts as a plasticizer and lowers the glass transition, allowing an increase in oxygen diffusivity. At 20 °C and 65% RH, the equilibrium moisture content in the EVOH layer is low enough that the hydrogen-bonded network restricts oxygen permeation to 0.17 cm³·20 μm/(m²·day·atm) under ISO 15105-2. At 85% RH, the same 20 μm layer transmits oxygen at 0.70 cm³·20 μm/(m²·day·atm). This increase is nonlinear and must be modelled as a function of water activity, not simply temperature. Packages intended for high-humidity environments require a moisture-protective exterior layer or a thicker EVOH layer; published data for complex nine-layer structures with specific tie-resin combinations is limited.
On production-scale coextrusion lines, F101A is processed in a dedicated barrier-layer extruder with a single screw of 24:1 to 30:1 L/D and a compression ratio of 2.5:1 to 3.5:1. Melt temperatures are typically maintained in the 200 °C to 230 °C range; exposure above 240 °C can initiate degradation, leading to gel formation and black specks in the barrier layer. Pellets must be dried in desiccant dryers to a residual moisture below 0.2 wt%, usually at 80 °C to 90 °C for 4 h to 6 h. If processing is interrupted, the EVOH extruder should be purged with low-density polyethylene and kept at low screw speed to avoid extended residence time.
Adhesion to polyethylene and polypropylene requires maleic anhydride-grafted tie resins; direct bonding to polyolefins is inadequate. Typical tie-layer thickness in cast film is 2 μm to 5 μm, and in thermoforming sheet 5 μm to 10 μm. Barrier-layer thickness is usually controlled between 5 μm and 12 μm. Final barrier performance should be verified directly by ASTM D3985 or ISO 15105-2 because orientation, thermal history, and adjacent tie resins alter oxygen-transmission values relative to cast monolayer measurements. For hot-fill and retort packaging, barrier retention at 85% RH becomes the controlling value; the 0.70 cm³·20 μm/(m²·day·atm) value at 20 °C and 85% RH demonstrates the reduction in barrier efficiency that must be compensated with a thicker EVOH layer or an external moisture barrier.
Blown film structures with F101A barrier layers are commonly built as five-layer or nine-layer structures using polyolefin skins and adhesive tie layers. In a five-layer PP/tie/EVOH/tie/PP film, die design must account for the viscosity mismatch between F101A and the polyolefin skins. Melt instability at the interface can appear as layer thickness chatter or wavy barrier lines. Reducing the barrier-layer melt temperature toward 210 °C while maintaining tie-resin melt temperature above its activation range can improve layer uniformity, but the precise window depends on the specific extruder screw geometry and feedblock design.
Ethylene content in EVOH copolymers is inversely correlated with dry oxygen barrier and directly correlated with moisture tolerance and flex crack resistance. F101A at 32 mol% ethylene occupies a midpoint position. A lower-ethylene grade at 27 mol% ethylene can provide lower oxygen transmission under dry conditions but exhibits a steeper humidity response and higher melting temperature, narrowing the coextrusion window with heat-sensitive tie resins. A higher-ethylene grade at 44 mol% ethylene provides greater melt elasticity and thermoformability at the expense of oxygen barrier; its oxygen transmission may be two to three times higher than F101A at equivalent humidity. Published comparative data for exactly matched coextrusion line configurations is limited; head-to-head values must be generated on the target multilayer structure.
Within the 32 mol% ethylene family, higher-flow grades such as those with a melt mass-flow rate near 4.0 g/10 min under ISO 1133-1:2022 are available. F101A, with 1.0 g/10 min, provides higher melt strength and is preferred for thicker barrier layers, blown-film bubble stability, and extrusion blow moulding where parison sag must be controlled. The higher-flow grade is better suited to thin coatings and high-speed coextrusion where lower viscosity reduces die pressure and enables lower melt temperatures. Selection between these grades should be based on layer thickness uniformity and line speed, not on oxygen barrier alone, because both grades share the same ethylene content and similar dry-barrier values.
For food-contact use, F101A may be evaluated under FDA 21 CFR 177.1360 and EU Regulation (EU) No 10/2011, subject to specific migration limits for ethylene-vinyl alcohol copolymer constituents. Industrial hygiene and disposal assessments typically reference REACH registration and RoHS Directive 2011/65/EU; the grade does not contain per- and polyfluoroalkyl substances as intentional additives. End users are responsible for verifying compliance of the finished multilayer article because tie resins, regrind layers, adhesives, and printing inks introduce their own migration profiles.
Field experience on barrier film lines indicates that moisture management before extrusion is the most frequent cause of lot-to-lot variation. Pellets exposed to ambient air at relative humidity above 60% can absorb moisture rapidly, and batches with residual moisture above 0.2 wt% may generate microvoids and layer thickness chatter in cast film dies. In injection stretch blow moulding, preform design must account for the difference in melting temperature between F101A and polyolefin skins; barrel zones are typically set to keep EVOH melt temperature below 230 °C while still achieving adequate adhesion to tie layers. Failure to purge after shutdown can produce carbonised deposits that detach during subsequent production runs, causing visible defects in high-transparency barrier films.
