| HS Code | 734429 |
| Product Name | EVOH EVAL FP101B |
| Polymer Type | Ethylene vinyl alcohol (EVOH) copolymer |
| Appearance | White pellets |
| Density | 1.19 g/cm³ |
| Melt Flow Rate | 3.2 g/10 min (190°C, 2.16 kg) |
| Melting Point | 183°C |
| Glass Transition Temperature | 62°C |
| Ethylene Content | 32 mol% |
| Oxygen Transmission Rate | 0.4 cm³·mm/(m²·day·atm) at 20°C, 65% RH |
| Tensile Strength | 80 MPa |
| Elongation At Break | 250% |
| Processing Temperature | 180–220°C |
As an accredited EVOH EVAL FP101B factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVOH EVAL FP101B is supplied in 25 kg sealed moisture-proof bags, with product identification and batch details printed on each bag. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): EVOH EVAL FP101B packed in 20-foot container, secured upright, moisture-protected, and ventilated for safe transport. |
| Shipping | EVOH EVAL FP101B is an ethylene vinyl alcohol copolymer resin supplied as moisture-sensitive pellets. Ship in sealed, dry containers or lined bags to prevent water absorption. Protect from humidity, extreme heat, and direct sunlight. No special hazardous classification applies, but keep away from ignition sources and dusty environments. |
| Storage | Store EVOH EVAL FP101B in its original sealed container in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and moisture. Keep containers tightly closed when not in use to prevent water absorption. Avoid contact with strong oxidizers. Maintain temperatures below 25°C. Use within recommended shelf life. |
| Shelf Life | Store in a cool, dry place in original sealed packaging. Typical shelf life is 2 years from manufacture date. |
In retortable stand-up pouches and lidding webs produced on five-layer cast coextrusion lines, EVAL FP101B is fed as the central oxygen barrier layer between two maleic-anhydride-grafted polyolefin tie layers, with outer layers of cast polypropylene or polyethylene. The finished laminate typically holds the FP101B core at 3–10 µm, because below 3 µm die edge shear and post-retort flex-cracking interrupt layer continuity, while above 10 µm flex-crack resistance diminishes and material cost rises without proportional shelf-life gain. Pre-drying in a desiccant-bed hopper dryer at 80°C ± 5°C for 4–8 h lowers residual moisture below 0.05 wt%; residual water above that threshold hydrolyzes vinyl alcohol segments during melting and appears as gel specks, bubble voids, and surface dimples on the primary web. Barrel temperature settings are 170–180°C in the feed throat, 190–220°C across the compression and metering zones, and 220–230°C at the adapter and die, with a melt stock maximum of 240°C. The extruder is typically a 75 mm single-screw with 28:1 L/D and a barrier screw; residence time at melt temperature is limited to 20 min. Finished pouches are tested under ASTM D3985 at 23°C and 0% RH on the oxygen side, where a 5 µm FP101B core yields oxygen transmission below 0.5 cm³/(m²·day·atm). After steam retort at 121°C for 30 min, transmission may rise to 1.5–3.0 cm³/(m²·day·atm) because absorbed moisture plasticizes the EVOH phase. Food-contact compliance for the structure falls under FDA 21 CFR §177.1360 where the grade-specific FCN permits use, and under EU Regulation 10/2011 Annex I with overall migration verification on the finished laminate.
Constructing a five-layer PP/tie/EVAL FP101B/tie/PP cast sheet at 800–1200 µm total thickness with a 5 µm core shows a non-linear oxygen transmission response as relative humidity on the test gas side increases. At 0% RH, representative data for medium-ethylene EVOH grades in dry test gas indicate an OTR range of 0.05–0.15 cm³/(m²·day·atm) per ASTM D3985; at 60% RH the value often remains between 0.3 and 0.6 cm³/(m²·day·atm); at 85% RH the slope steepens and the measured flux enters 2.0–5.0 cm³/(m²·day·atm); at 95% RH oxygen flux may exceed 7.0 cm³/(m²·day·atm). The change is not a simple Fickian doubling but corresponds to hydrogen-bond disruption in the vinyl alcohol segment, free-volume increase, and water clustering that acts as a plasticizer. For products sealed above 85% RH without desiccant, sheet converters compensate by increasing the EVOH core to 12–20 µm and may add a polyolefin moisture barrier on the product side to delay water accumulation. Thermoformed polypropylene cups from the same sheet are processed with mould surface temperatures of 160–180°C and plug-assist speed 200–350 mm/s. Corner thinning in the formed part reduces local barrier disproportionately; a 30% reduction in core thickness raises local oxygen flux by roughly 2–2.5× according to the inverse-thickness relationship. Flat-sheet ASTM D3985 values therefore cannot be used for shelf-life prediction of formed containers; package-level oxygen ingress should be measured by a coulometric sensor method such as ASTM F1307. When the fill is above 95% RH, replacing FP101B with a higher-ethylene EVOH grade is normally evaluated because the plateau barrier under wet service is no longer processable with this core alone.
Representative gas-flux data for a five-layer PP/tie/EVAL FP101B/tie/PP cast sheet with a 5 µm core are shown below; lot-specific FP101B values should be confirmed by certificate because EVOH barrier response varies with ethylene ratio and thermal history.
| Test-gas relative humidity at 23°C | OTR range for 5 µm EVAL FP101B core in five-layer PP sheet | Practical interpretation |
|---|---|---|
| 0% | 0.05–0.15 cm³/(m²·day·atm) | Dry gas barrier benchmark under ASTM D3985 |
| 60% | 0.3–0.6 cm³/(m²·day·atm) | Mild plasticization but still high barrier |
| 85% | 2.0–5.0 cm³/(m²·day·atm) | Steep flux increase; desiccant or thicker core required |
| 95% | >7.0 cm³/(m²·day·atm) | Barrier plateau lost; higher-ethylene EVOH or overpack needed |
When a flexible lidding structure replaces cold-form aluminium for an oxygen-sensitive oral solid dose, the lamination often uses 12 µm polyester outer film, a 5 µm EVAL FP101B core, and 50 µm LLDPE sealant, bonded by 2–3 g/m² aliphatic polyurethane adhesives. The FP101B layer is incorporated as a pre-extruded mono- or coextruded film that is dry-laminated rather than extrusion-coated, because melt extrusion directly onto aluminium or PET at EVOH melt temperatures above 220°C creates oxidative gel defects and weak thermal bonding. Oxygen transmission is measured per ASTM D3985 on the laminate after curing and again after stability storage under ICH Q1A(R2) accelerated conditions of 40°C/75% RH; the high-humidity condition is essential because EVOH barrier loss at the sealant side can shift the oxygen flux by more than one order of magnitude. Water vapour transmission is measured according to USP <671> or ASTM F1249. The terminal lidding seals against PVC, PVDC, or Aclar blister bases at 150–180°C seal-jaw temperature and 0.3–0.7 MPa sealing pressure. Gamma irradiation at 25 kGy is not recommended for EVAL FP101B-containing laminations intended for clear packaging because the vinyl alcohol segment undergoes chain scission and visible yellowing; electron-beam at 10–20 kGy may be less discoloring but still requires dose mapping on the finished roll. Ethylene oxide permeation and residual gas retention must also be measured because EVOH is a gas barrier but not an ethylene oxide-specific chemical barrier. Quality management for pharmaceutical primary packaging follows ISO 15378:2017; the extruded FP101B film should be supplied with lot-specific melt flow rate and residual solvent certificates.
On a three-layer or five-layer blown film line with die diameter 250 mm, die gap 1.8 mm, blow-up ratio 2.0–2.5, and frost line height 700–900 mm, an EVAL FP101B core at 2–5 µm thickness is coextruded with LDPE or LLDPE outer layers and ethylene-vinyl acetate tie layers. The melt temperature at the die is held at 205–220°C; raising the die temperature above 230°C to reduce melt fracture increases oxidative degradation at the die lip and deposits brown degraded EVOH on the internal mandrel within 4–6 h of continuous production. Bubble stability is sensitive to the viscosity ratio between the FP101B core and the polyolefin skin; a mismatch larger than 3:1 at apparent shear rate 100 s⁻¹ produces core layer waviness, gauge variation above ±8%, and intermittent frost line breathing. The finished laminate is used for stand-up sachets of shampoo, conditioner, and liquid soap, where oxygen barrier must be paired with resistance to terpenes, limonene, and synthetic fragrance molecules. While EVAL FP101B provides high oxygen and aroma barrier in dry burst-open testing, the presence of water in the cosmetic emulsion on the sealant side can saturate the internal EVOH layer during long-term shelf storage at 40°C/75% RH, so accelerated package testing should measure fragrance loss and oxygen ingress together rather than from flat film data alone. The film edge trim is recycled into the polyolefin skin layer at up to 20 wt% after grinding, but direct regrind of FP101B-containing trim into the barrier layer is not used because mixed-layer gels and carbonized specks form in the metering section.
Automotive coextrusion blow moulding lines for HDPE fuel tanks require a barrier resin with parison sag resistance, high melt strength, and stable adhesion under 20–30 wt% regrind loading. EVAL FP101B is a film-grade resin; published data for this specific configuration is limited, and its use in a six-layer tank wall consisting of HDPE/regrind/tie/EVOH/tie/HDPE is normally limited to development trials. In trials the FP101B layer is held at 2–4 wt% of total part weight, with a barrier wall thickness of 50–200 µm from a 6 mm parison. The extruder melt temperature for the barrier layer is set at 210–225°C, and the accumulator head must not exceed 230°C for more than 15 min. Parison programming must reduce barrier-layer extrusion velocity during preinflation and increase die gap to offset the lower sag resistance of the film grade, otherwise the core layer thins to 20–40 µm near the pinch-off seams and hydrocarbon permeation rises locally. Fuel permeation is not predictable from ASTM D3985 oxygen data; automotive fuel systems require hydrocarbon permeation tests using OEM-specific methods, often derived from SAE J1737 or the corresponding fuel system component permeation protocols, and the finished tank must pass evaporative emission limits set by U.S. EPA and the California Air Resources Board. Drop impact at −40°C and pressure-vacuum cycling are also required for fuel tanks, but the EVOH layer is not a structural layer and its crystallinity affects crack propagation only when adhesion to the tie layer fails. Processors should replace FP101B with a fuel-grade EVOH for serial production unless lot-specific melt index, sag resistance, and adhesion strength on the intended tie layer are verified on the blow moulding line.
In five-layer oxygen-barrier PEX pipe for closed-loop heating and cooling circuits, an oxygen barrier layer of EVAL FP101B with 50–100 µm thickness is coextruded between a PEX or PE-RT inner layer, a maleic-anhydride-modified polyethylene tie, and an outer HDPE or PEX layer. The pipe line runs at 8–20 m/min depending on diameter 16–63 mm, with a coextrusion die head temperature of 210–225°C and a water cooling tank at 15–25°C. A film-grade FP101B may exhibit lower melt strength than dedicated pipe barrier grades, so the pipe coextruder is typically run with a grooved feed section and a barrier screw at 60–90 rpm to maintain layer uniformity. Oxygen diffusion through the pipe wall is evaluated according to DIN 4726; hydronic heating circuits generally require an oxygen ingress rate below 0.1 g/(m³·d) at 40°C, and a 60 µm FP101B core in a 32 mm PEX pipe can meet that threshold when barrier continuity is retained through the calibration sleeve. The pipe must also pass the crosslinking requirement for the PEX matrix, typically silane grafted or peroxide crosslinked; the EVOH layer is not crosslinked and must not be subjected to post-extrusion moisture-cure chamber temperatures above 95°C because prolonged wet heat reduces oxygen barrier. Field experience shows that stress cracks at the tie layer and EVOH layer are the dominant failure mode when the pipe is bent below the manufacturer’s minimum bend radius of 5 times the outside diameter; the barrier layer should be continuous and free of weld-line thinning after the spiral-calibration sleeve. This configuration is used in underfloor heating manifolds, district heating branch lines, and chilled ceiling panels, where oxygen ingress into the fluid prevents corrosion of ferrous circulator components.
The following compliance framework applies across the above applications when EVAL FP101B is used in direct or indirect food-contact or pharmaceutical structures. Grade-specific FCN and regional listing must be confirmed against the finished laminate, not the resin alone.
| Application | Standard or test method | Condition or limit |
|---|---|---|
| Food-contact laminate | FDA 21 CFR §177.1360 | Grade-specific FCN; end-test extraction per Part 176 |
| EU food-contact | EU 10/2011 Annex I | Overall migration <10 mg/dm² |
| Oxygen transmission | ASTM D3985 | 23°C, 0% RH dry gas |
| Water vapour transmission | ASTM F1249 | 38°C, 90% RH |
| Melt flow rate | ISO 1133-1:2022 | 190°C, 2.16 kg |
| Pharma primary packaging QMS | ISO 15378:2017 | Lot traceability and residual solvent control |
Competitive EVOH EVAL FP101B prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
EVAL FP101B is a semicrystalline ethylene-vinyl alcohol copolymer (EVOH) resin supplied for oxygen-barrier layers in coextruded film, sheet, and blow-moulded packaging structures. The grade belongs to the F-series of EVAL resins, where the ethylene content is approximately 32 mol% and the melt mass-flow rate is reported in the range 1.0–2.0 g/10 min at 190 °C under 2.16 kg load according to ISO 1133-1:2022. Solid density is specified as approximately 1.19 g/cm³ by ISO 1183-1:2019. The dry-resin glass transition temperature is near 62 °C, and crystalline melting temperature is typically 181–185 °C by differential scanning calorimetry at 10 °C/min. The oxygen-barrier function is thickness-dependent: a continuous FP101B layer of 3–10 µm in a multilayer film typically yields an oxygen transmission rate below 1.0 cm³·m⁻²·day⁻¹·atm⁻¹ at 20 °C and 65% RH when measured by ASTM D3985-17. The resin is not intended for monolayer barrier service because moisture plasticisation reduces the hydrogen-bonded network that limits oxygen diffusion.
The barrier mechanism of this resin arises from intermolecular hydrogen bonding in the vinyl alcohol segments. Above 70–80% RH, moisture disrupts that network, plasticises the amorphous phase, and increases oxygen diffusion. For this reason, FP101B is buried between polyolefin skins with water vapour transmission rates no greater than 5 g/m²·day at 38 °C and 90% RH when tested by ASTM F1249-20. In flexible packaging, common outer skins include low-density polyethylene, linear low-density polyethylene, or cast polypropylene; the EVOH layer is placed near the package interior to reduce moisture load. Compared with high-ethylene EVOH grades containing 44 mol% ethylene, FP101B provides lower oxygen transmission under dry and moderate relative humidity but greater moisture sensitivity above 85% RH. Grade-specific differentiation from other F-series resins is limited in public technical literature; the manufacturer’s current technical bulletin should be consulted for lot-level gel-count and melt-flow acceptance ranges.
Compared with PVDC dispersion coatings, FP101B is halogen-free and offers lower density per unit barrier area but requires coextrusion and internal layer placement. Compared with nylon 6 barrier layers, FP101B provides lower oxygen transmission at 65% RH but loses barrier more rapidly above 85% RH. Typical package structures include PP/tie/EVOH/tie/PP for retort trays and LDPE/tie/EVOH/tie/LDPE for pouch films. The EVOH layer is usually 3–10 µm in flexible film and 10–20 µm in semi-rigid sheet. In all cases, the EVOH layer is buried because direct contact with liquid water or high-humidity headspace reduces barrier within hours.
Before melt processing, FP101B pellets require moisture reduction below 0.1 wt% (1000 ppm) to limit hydrolytic chain scission at extrusion temperatures. A closed-loop desiccant-bed dryer with an outlet dew point of −40 °C or lower and inlet air temperature of 85–100 °C is specified for 4–6 h when pellets are taken from sealed containers. In plants where ambient relative humidity exceeds 60%, pellet transfer from dryer to extruder throat should be completed within 30 min or maintained under dry-air conveying. Residual moisture above 0.15 wt% generates microbubbles, surface haze, and localised gel streaks in thin cast film. Desiccant-bed capacity should be selected to deliver a return-air dew point not higher than −30 °C. Hopper drying at 100 °C for less than 2 h is generally insufficient for cold pellets from ambient storage. Drying below 0.05 wt% does not improve adhesion but may increase pellet fracture if dryer temperature exceeds 110 °C.
Processors using bulk bags or outdoor silos should seal surge hoppers and purge with dry nitrogen at 2–5 m³/h. Moisture sorption in EVOH is rapid at the pellet surface; therefore, hopper residence time in humid environments should be minimised rather than compensated by higher temperature. FP101B should be stored in sealed containers at or below 30 °C and protected from direct sunlight. Opened containers should be used within 8 h or transferred to desiccant-dried hoppers. Exposure to warehouse air for more than 12 h at 70% RH can raise pellet surface moisture above 0.3 wt%, requiring renewed drying before extrusion.
In blown film coextrusion, FP101B is run on a dedicated barrier extruder of 50–75 mm screw diameter and 24:1–30:1 L/D using a barrier screw with gradual compression and no mixing pins that create dead spots. Barrel zone set points from feed to metering are typically profiled from 180 °C to 220 °C, with melt temperature held at 220–235 °C and die temperature not exceeding 240 °C. Residence time above 240 °C for more than 10 min promotes gel formation and localised black speck contamination. Die pressure in cast film lines is typically 10–20 MPa depending on output and die gap; melt pumps are recommended when EVOH layer thickness is below 5 µm. The EVOH layer is normally 3–8% of total film thickness, and die-lip gaps are set at 0.8–1.5 mm for cast film and 1.5–2.5 mm for sheet. Direct exposure of molten FP101B to die walls or air is undesirable because oxidised edge bead can break and enter the winding roll.
Multi-manifold dies are preferred over feedback blocks for cast film because they permit independent melt-temperature control of the FP101B layer. In feedblock systems, transition plates should be streamlined to avoid low-flow zones; wall shear stress in the EVOH channel should remain below 3×10⁵ Pa to avoid sharkskin at the die lip. Coextruded blow moulding uses an EVOH layer of 2–4% of wall thickness; melt temperature is commonly 210–225 °C, and parison programming must avoid folds that expose FP101B to the air gap. Delamination in the pinch-off region indicates insufficient tie-layer coverage or a melt-temperature mismatch greater than 20 °C between FP101B and the skin resin. Pellets are supplied as off-white cylindrical granules with diameter 2–3 mm and length 3–4 mm for uniform gravimetric dosing.
Adhesion between FP101B and polypropylene skins is obtained with maleic anhydride–grafted polypropylene tie resins. Peel strength after dry conditioning at 23 °C and 50% RH should be above 2 N/15 mm in the machine direction by ASTM F88/F88M-21 where lap seals are converted from the laminate. Tie-layer thickness is normally 10–15% of total multilayer thickness; coverage below 5% can produce visual delamination at the edge trim during slitting. In PP/EVOH/PP structures, skin-layer melt temperature is commonly 230–245 °C, while the FP101B core remains below 235 °C. Interfacial temperature above 250 °C can initiate localised decomposition and reduce peel strength. Silver streaks in the seal area are more often caused by moisture in the tie resin or FP101B than by insufficient graft density.
For polyethylene skin layers, anhydride-modified polyethylene tie resins are used, and FP101B is placed between two tie layers to prevent direct contact with moisture. Adhesion to nylon or polyvinylidene chloride is not assumed; nylon/EVOH tie bonding requires a dedicated tie resin qualified by coextrusion peel testing under ASTM F904-16. If peel failure occurs at the tie/EVOH boundary rather than within the tie resin, the corrective action is normally a change in tie-resin chemistry, not an increase in EVOH layer temperature.
Substitution of a 32 mol% ethylene FP101B layer for a 44 mol% ethylene EVOH in retortable trays improves dry-state oxygen barrier but increases moisture-induced barrier loss after steam retort. In a 10 µm EVOH core layer between 250–400 µm polypropylene skins, oxygen transmission rate before retort is typically below 0.5 cm³·m⁻²·day⁻¹·atm⁻¹ at 20 °C and 65% RH; after 121 °C for 30 min, values can increase to 1.5–3.0 cm³·m⁻²·day⁻¹·atm⁻¹ for 24–48 h before partial recovery. Published data for this exact configuration are limited; the recovery curve depends on EVOH layer thickness, headspace humidity, and cooling rate. FP101B is not recommended where the EVOH layer is thinner than 5 µm and 121 °C retort is specified, because steam penetration through the skin reduces barrier below the required limit. For hot-fill packaging at 85–95 °C, the grade is used with polypropylene skins and is typically qualified for fill temperatures below 95 °C. An oxygen scavenger in the polyolefin layer can compensate for post-retort barrier loss but does not eliminate the need for EVOH layer thickness above 5 µm.
In biaxially oriented film and deep-draw thermoforming, FP101B is oriented in a softened state. Orientation temperature is typically 90–110 °C for solid-phase forming, and draw ratios above 3×3 are possible when the EVOH layer is below 10 µm. Local thinning below 3 µm in corner radii increases oxygen transmission by a factor of two or more; therefore, sheet plug assist and cavity geometry must maintain EVOH layer distribution within ±20% of nominal. Thickness mapping of formed trays should be performed at the corner, flange, and sidewall because the oxygen barrier is dominated by the thinnest EVOH region.
Oxygen transmission of EVOH is strongly dependent on relative humidity and ethylene content. Comparative ranges for thickness-normalised films at 20 °C are shown in Table 1. FP101B falls within the 32 mol% ethylene class; high-ethylene grades show lower dry barrier but less humidity sensitivity. Values are representative and not lot-specific. Standardised transmission testing is required for release because moisture preconditioning changes the barrier by more than 10-fold across the 0–85% RH range.
| Condition | 32 mol% EVOH class | 44 mol% EVOH class | Test method |
|---|---|---|---|
| Oxygen transmission rate at 20 °C, 0% RH | 0.1–0.4 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | 1.0–3.0 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | ASTM D3985-17 |
| Oxygen transmission rate at 20 °C, 65% RH | 0.4–0.8 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | 2.0–4.0 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | ASTM D3985-17 |
| Oxygen transmission rate at 20 °C, 85% RH | 3.0–8.0 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | 5.0–12.0 cm³·20 µm·m⁻²·day⁻¹·atm⁻¹ | ASTM D3985-17 |
Equilibrium moisture uptake of 32 mol% EVOH at 23 °C is typically 2–4 wt% at 65% RH and above 7 wt% at 90% RH. This uptake is reversible at room temperature but can leave haze if the film is wound hot or blocked. For aseptic pouch structures, oxygen transmission after 90% RH preconditioning should be verified using ASTM F1927-20 for package integrity and oxygen decay. When the FP101B layer is exposed to high-humidity distribution cycles, the dry-barrier advantage over PVDC is retained only if the outer skin WVTR remains below 5 g/m²·day at 38 °C and 90% RH.
Edge trim containing FP101B can be recovered into the polyolefin skin layer at 15–20 wt% addition, but incorporation into the barrier layer is normally limited to 10 wt% or less because residual gels nucleate film breaks and reduce clarity. On cast-film lines with a 90 mm feedblock and 1.2 m die width, gel-induced web breaks are reported when EVOH regrind exceeds 20 wt% and melt residence time exceeds 12 min. The observed failure mode is internal bubble formation at the die lip rather than uniform viscosity shift. For FP101B, closed-loop edge-trim recovery should include melt filtration of 100–150 µm mesh packs on skin extruders and monitoring of melt-pressure variation below 0.5 MPa. Regrind colour and moisture must be controlled because oxidised edge trim raises the yellowness index of the final web.
Thermomechanical degradation of EVOH proceeds by both chain scission and crosslinking; oxygen barrier is lost when gel content increases above 0.5 wt% as measured by filter-pressure rise. Incompatibilities with strong bases or amines accelerate saponification at the layer surface and should be avoided in purging compounds used for coextrusion. If high-amine purging agents are used, they should be followed by a low-MFR polyolefin purge and a barrier-layer purge of virgin FP101B before production restarts. The use of recycled FP101B in direct food-contact barrier layers is not recommended unless the finished package passes migration testing under the intended food simulants and contact conditions.
For food-contact applications, FP101B is represented as conforming to FDA 21 CFR 177.1360 and European Commission Regulation (EU) No 10/2011 for ethylene-vinyl alcohol copolymers, subject to migration limits for ethylene and vinyl alcohol oligomers. Finished multilayer structures must be tested according to EN 1186-1 and EN 13130-1 using appropriate food simulants. The resin is halogen-free and is not a drop-in replacement for PVDC in applications requiring prolonged 85% RH barrier without outer moisture protection. Contact with relative humidity above 90% RH for extended storage reduces oxygen barrier and interlayer adhesion unless polyolefin skins are present. Lot-specific testing under intended package geometry and filling conditions is required; the numerical ranges described here are not a substitute for supplier certification or finished-package barrier measurement.
