ExxonMobil Exceed Flow mLLDPE 0814ML

In blown-film converting for fresh-cut produce packaging, ExxonMobil Exceed Flow mLLDPE 0814ML is incorporated at 20–35 wt% into the core layer of coextruded structures, replacing conventional hexene LLDPE to raise dart impact resistance under ASTM D1709-22 method A while retaining haze below 5% measured by ASTM D1003-21. The sealant layer may contain 0814ML at 60–100 wt%, with the remainder a low-viscosity LDPE selected to broaden hot-tack strength under ASTM F1921-19 without depressing seal initiation temperature measured by ASTM F2029-16. Food-contact conformance is assessed under FDA 21 CFR 177.1520 for olefin polymers and EU Regulation 10/2011, with total migration testing performed in food simulant D2 at 70°C for 2 h under OM2 conditions, target overall migration ≤10 mg/dm² per EN 1186-1:2002.

Jurisdiction	Designation	Test method	Limit or condition
US food contact	FDA 21 CFR 177.1520	Extraction in n-hexane and xylene	Olefin polymer clearance
EU food contact	EU Regulation 10/2011	EN 1186-1:2002	≤10 mg/dm² overall migration
Density	ASTM D792-20	Density gradient column	0.918 g/cm³ nominal
Melt mass-flow rate	ISO 1133-1:2022	190°C/2.16 kg	1.0 g/10 min nominal

Blown-film lines with 45–75 mm grooved-feed extruders and L/D 28:1–33:1 are run at melt temperatures of 190–210°C, die gaps of 1.8–2.2 mm, blow-up ratios of 2.2:1–2.8:1, and frost line heights of 250–400 mm; these settings suppress bubble sag and reduce dart impact variability caused by low melt strength. Terminal structures include bag-in-box liners, frozen vegetable pouches, and fresh-cut salad films, where the narrow molecular weight distribution of 0814ML reduces optical defects but demands tighter barrel temperature profiling than Ziegler-Natta LLDPE.

What Limits Melt Stability in Coextruded Sealant Webs Based on 0814ML?

The narrow molecular weight distribution of 0814ML compels precise barrel temperature management on five-layer coextruded sealant lines. In lidding-film structures, the sealant layer is designed at 8–15 µm of a total 50–70 µm film and is typically formulated with 50–80 wt% 0814ML, with the remainder an LDPE grade having melt mass-flow rate 0.5–1.5 g/10 min to broaden the heat-seal initiation window measured by ASTM F2029-16. Gravimetric dosing on five-layer lines is maintained at ±0.3% accuracy because sealant-layer thickness variation exceeding ±2 µm shifts seal initiation temperature outside the validated range for high-speed packing machines.

Compliance for food-contact lidding requires EU Regulation 10/2011 migration testing under OM2 or OM3 conditions and FDA 21 CFR 177.1520 clearance; for terminally sterilised medical device pouches, ISO 11607-1:2019 governs the seal integrity and peel strength protocol using ASTM F88/F88M-23. Production-scale experience indicates that melt instability emerges when output exceeds 0.9 kg/h per mm of die circumference on 300 mm diameter five-layer dies with 1.5–2.0 mm die gaps, unless a polymer processing aid is added at 300–800 ppm; frost line height is held from 200 mm to 350 mm with blow-up ratio 2.0:1–2.5:1 and melt temperature 200–220°C to maintain bubble stability. Head pressure on the coextrusion die is typically recorded between 250 bar and 400 bar; pressure fluctuations greater than ±5 bar indicate melt-temperature inhomogeneity or feed instability in the sealant-layer extruder.

Terminal webs include dairy cup lidding, PP/PE cup sealants, and medical device pouches; sealant layer thickness below 8 µm is not advised with this grade because the seal initiation window narrows to approximately ±3°C, causing intermittent seal failure. The use of amine-based antifog or antistatic additives in the sealant layer requires sealing-curve revalidation, because migration of low-molecular-weight tertiary amines can shift seal initiation temperature by 3–5°C.

Agricultural film builders that add 0814ML into hexene LLDPE grades at 15–30 wt% obtain improved dart impact resistance under ASTM D1709-22 method A and higher Elmendorf tear propagation in machine direction under ASTM D1922-23. Conformity in the European Union requires registration under REACH 1907/2006 and, for silage wrap, compliance with EN 13206:2017 for tensile, tear, and UV durability properties. Blown-film lines dedicated to agricultural webs are run with die gaps of 1.8–2.4 mm, blow-up ratios of 2.5:1–3.0:1, melt temperatures from 195°C to 215°C, and frost line heights from 400 mm to 600 mm; internal bubble cooling is preferred to remove the heat load associated with 25–150 µm film thickness. Ultraviolet stabilization using hindered amine light stabilizer and UV absorber masterbatch is typically added at 1.0–1.5 wt% for 150 µm greenhouse film, with the exact loading adjusted by accelerated xenon arc ageing under ISO 4892-2:2021. Terminal agricultural structures include silage stretch wrap, greenhouse covering film, and low-tunnel mulch film.

Collation Shrink Film Formulation and Orientation Window

At blown-film lines running haul-off speeds above 600 m/min, collation shrink film made from 0814ML is generally not used as the sole resin; instead, 0814ML is blended at 10–25 wt% with LDPE and C4 LLDPE to modify tear propagation resistance under ISO 6383-1:2015 while preserving shrink force measured by ISO 14616:2014. Compliance for consumer multipack shrink film includes EU Packaging and Packaging Waste Directive 94/62/EC and, for electronics packaging, RoHS 2011/65/EU; food-contact multipack collation film conforms to EU Regulation 10/2011 when tested under the appropriate simulant and OM2 condition. Production-scale collation shrink equipment uses 1.6–2.2 mm die gaps, blow-up ratios of 2.8:1–3.2:1, melt temperatures from 190°C to 215°C, and frost line heights from 350 mm to 500 mm to orient the film in transverse direction. Terminal products include can multipack sleeves, bottle collation shrink film, and printed shrink collars; transverse shrink tension values at 120°C in silicone oil under ISO 14616:2014 are used to verify shelf collapse performance. Loading above 25 wt% is not recommended because transverse shrink tension declines below typical collation thresholds and the film loses the rigid-bundle holding force required for high-speed sleeve application.

Blend configuration	0814ML	LDPE	C4 LLDPE	Test standard
Low-shrink control	0 wt%	70 wt%	30 wt%	ISO 14616:2014
Standard collation	15 wt%	60 wt%	25 wt%	ISO 6383-1:2015
High tear	25 wt%	50 wt%	25 wt%	ASTM D1922-23

Heavy-duty liners filled with low-bulk-density chemical loads frequently fail by tear propagation at the side weld; 0814ML raises Elmendorf tear measured by ISO 6383-1:2015 and puncture resistance under ASTM D5748-23 when added at 15–30 wt% to conventional C8 LLDPE. For liners used in UN-certified dangerous goods packaging, performance is verified by drop, stacking, and leakproofness tests under the UN Manual of Tests and Criteria Part II, with additional material conformance under REACH 1907/2006 and CLP 1272/2008 where chemical contact is anticipated. Production-scale blown-film lines typically use 75–90 mm grooved-feed extruders with L/D 30:1, screen packs of 100/250/100 mesh, die gaps of 2.0–2.5 mm, blow-up ratios of 1.8:1–2.2:1, and melt temperatures from 190°C to 225°C; internal bubble cooling and an oscillating haul-off reduce gauge variation to ±5% across the layflat width. Terminal products include flexible intermediate bulk container liners, drum liners, and bulk chemical liners. Addition above 30 wt% with high-molecular-weight C8 LLDPE grades is not recommended, because the melt-strength differential produces dart impact anisotropy between machine and transverse directions.

When 0814ML Is Diluted with Post-Consumer Recyclate in Linear Low-Density Film Lines

When post-consumer recyclate content exceeds 25 wt% in linear low-density film structures, the addition of 0814ML at 10–20 wt% restores dart impact and tear resistance that is otherwise depressed by gel particles and low-molecular-weight contaminants in the recyclate stream. Compliance follows EU Packaging and Packaging Waste Regulation (EU) 2025/40 for recyclability and, where the final film is used for non-food packaging, REACH 1907/2006; food-contact recycled film requires an EFSA-approved recycling process and full migration testing under EU Regulation 10/2011.

Blown-film extrusion with recycled content demands lower melt temperatures of 190–205°C, 80/200/80 mesh screen packs, and continuous melt filtration through a gear pump to limit pressure spikes from gel accumulation. Die gap is maintained at 2.0–2.4 mm, blow-up ratio at 2.0:1–2.4:1, and frost line height at 300–450 mm to stabilize the bubble against holes initiated by recyclate particulates. Terminal products include refuse sacks, e-commerce mailer film, construction vapour barrier, and non-food shrink bundling film; published data for the specific configuration of 0814ML with mixed polyolefin recyclate at above 40 wt% recyclate content is limited, so validation trials are required before commercial adoption.

How Does Comonomer Distribution Uniformity Shift Hot-Tack Initiation and Seal Strength?

The difference in seal performance between Exceed Flow 0814ML and Ziegler-Natta LLDPE of the same density arises from the distribution of short-chain branches among chains of different molecular mass. In conventional Ziegler-Natta LLDPE, comonomer insertion is non-uniform; low-molecular-mass fractions are often branch-poor and can crystallize into thicker lamellae that melt at higher temperatures. This heterogeneity requires a higher seal bar temperature to achieve the same polymer interdiffusion at the seal interface. Exceed Flow 0814ML, with a density of 0.914 g/cm³, yields a narrower crystallite thickness distribution and a lower incipient melting range. Differential scanning calorimetry of the neat resin typically shows the main melting endotherm between 115 °C and 122 °C; seal initiation, however, is not equivalent to peak melting temperature because partial melting and chain diffusion under pressure occur below the DSC peak. In monolayer films of 25 µm gauge, a reduction in seal initiation temperature of approximately 5–10 °C relative to a 0.918 g/cm³ Ziegler-Natta LLDPE is common, but the exact value must be established on the target vertical form-fill-seal equipment. Hot-tack testing per ASTM F1921 and seal-strength testing per ASTM F88 are required because dwell time, seal bar pressure, film flatness, and chill-roll thermal history all shift the seal curve. Published data for this specific grade under production-scale conditions is limited; the datasheet provides no direct hot-tack window, so conversion trials are required.

On a 2000 mm blown-film line with a 75 mm grooved-feed extruder, 30:1 L/D barrel, and 250 mm spiral mandrel die with 1.2 mm die gap, the resin was processed at melt temperatures of 190–205 °C, blow-up ratio 2.3–2.5, and frost-line height 6–10 die diameters. The narrow molecular weight distribution of 0814ML can raise die pressure by 10–20% compared with a Ziegler-Natta LLDPE of similar melt index and density at equal screw speed; this pressure increase is not a defect but requires the extruder drive and melt filtration system to be sized accordingly. A screen pack of 20/40/60 mesh or finer is typically used to generate melt backpressure and remove gels; pressure drop across the screen pack should be monitored, and the pack should be changed when pressure exceeds the line-specific clean condition by more than 25%. Bubble stability in high-stalk configuration is lower than that of a branched LDPE but improved relative to conventional LLDPE of the same melt index due to the controlled melt elasticity of the metallocene architecture. LDPE blending at 10–20 wt% is used when additional melt strength is required for very thin gauges; however, each 10 wt% LDPE addition tends to reduce the dart impact advantage of the mLLDPE. If fluoropolymer process aid is used to delay sharkskin, levels of 200–800 ppm are typical, and the agent should be introduced as a masterbatch during a stable run to avoid screw slip.

In grooved-feed extruders, the barrel section behind the feed throat must be cooled to prevent premature melting; a temperature profile of 170 °C, 180 °C, 190 °C, 195 °C, 200 °C, and 205 °C from rear zone to die is common. The screw should have a compression ratio between 2.5:1 and 3.5:1 and a low-shear mixing section; high-intensity mixing elements can raise melt temperature and reduce output by increasing shear heating. A barrier screw with a Maddock mixer may be used, but the mixing section should not generate more than 10 °C temperature rise at typical screw speeds.

Melt Fracture Threshold Data on High-Stalk Blown Film Lines

Sharkskin onset for Exceed Flow 0814ML is a function of die-lip shear rate and melt temperature. In a 1.2 mm die gap, onset typically occurs at die-lip shear rates near 400–800 s⁻¹, with the lower value applying to melt temperatures below 190 °C and the upper value to clean dies with optimized process aid. At constant die gap, increasing output beyond the sharkskin threshold can produce gross melt fracture with periodic surface distortion. Raising melt temperature to 205 °C reduces viscosity and shifts the threshold upward but may increase thermal oxidation byproducts if residence time exceeds 10 min. The melt should not be held above 240 °C for more than a short transient because gel formation and odor generation can occur. Batch-to-batch variation in melt mass-flow rate around the nominal 0.80 g/10 min can shift the sharkskin onset by several percentage points; after any lot change, extrusion parameters should be re-established. At start-up, the line should be purged with a lower-viscosity LDPE or commercial purging compound until the melt reaches a stable temperature and no degraded gel particles are visible. Die pressure during continuous operation should remain below the die manufacturer's limit; for many spiral mandrel dies this is below 400 bar, but the actual limit is equipment-specific.

Cast film extrusion of 0814ML is carried out on flat-die lines with a melt temperature of 180–220 °C and chill-roll temperatures of 15–25 °C. The controlled melt elasticity allows drawdown to thin film; however, neck-in at the die edges can be 10–20% of the die width and must be accommodated by deckle adjustment. In cast film, low seal initiation is retained but the low orientation means tensile properties are more isotropic than in blown film at the same gauge. The product is used in cast stretch and cling film only as a blend component where overall film stiffness and load retention are set by higher-density LLDPE or metallocene plastomers; published data for this specific grade in cast film is limited.

Dart Impact and Puncture Response at Low-Speed Deformation

Dart impact measured by ASTM D1709 Method A on a 25 µm monolayer film is improved relative to a Ziegler-Natta LLDPE of equal density because the mLLDPE architecture suppresses the formation of large spherulitic superstructures that act as stress concentrators. Puncture resistance measured by ASTM D5748 on the same film is also enhanced; however, absolute values are strongly influenced by frost-line height, blow-up ratio, and cooling-air temperature. Lower frost-line height produces film with more frozen-in orientation and typically raises machine-direction tensile yield at the expense of transverse-direction tear resistance. Elmendorf tear measured per ASTM D1922 can show a machine-direction value lower than the transverse-direction value when the film is produced at high stalk height; the user should not interpret a low MD tear value as an inherent resin defect. Optical haze measured per ASTM D1003 is generally lower than that of comparable Ziegler-Natta LLDPE at the same gauge, but values below 6% require optimum airflow, clean die lips, and a melt temperature above 195 °C. Published data for this specific resin in 18 µm and 10 µm cantilevered web configurations is limited; performance at thin gauges should be evaluated on the production line.

Regulatory compliance for food-contact applications requires migration testing on the final film because conversion aids, printing inks, and lamination adhesives can alter overall migration. The base resin is represented under FDA 21 CFR 177.1520 as an olefin polymer for food contact; end-use limitations in the regulation depend on film thickness and food type. Under EU Regulation 10/2011, the overall migration limit is 10 mg/dm² of food-contact surface area for plastic materials and articles; specific migration limits apply to individual additives. A compliance checklist for incoming material is shown below.

Control point	Standard/regulation	Condition
Melt mass-flow rate	ASTM D1238, ISO 1133-1:2022	190 °C, 2.16 kg, nominal 0.80 g/10 min
Density	ASTM D1505, ISO 1183-1:2019	23 °C, nominal 0.914 g/cm³
Food contact – US	FDA 21 CFR 177.1520	Olefin polymer, end-use migration test required
Food contact – EU	EU Regulation 10/2011	Overall migration limit 10 mg/dm²
REACH SVHC	EC 1907/2006	No SVHC above 0.1% w/w in the grade

Control point

Standard/regulation

Condition

Melt mass-flow rate

ASTM D1238, ISO 1133-1:2022

190 °C, 2.16 kg, nominal 0.80 g/10 min

Density

ASTM D1505, ISO 1183-1:2019

23 °C, nominal 0.914 g/cm³

Food contact – US

FDA 21 CFR 177.1520

Olefin polymer, end-use migration test required

Food contact – EU

EU Regulation 10/2011

Overall migration limit 10 mg/dm²

REACH SVHC

EC 1907/2006

No SVHC above 0.1% w/w in the grade

The resin should not be combined with excessive levels of amine-based additives, which can interact with the stabilization system and produce color bodies. If the film is corona-treated for printing or lamination, the treatment level should be monitored because over-treatment above 50 dyn/cm can oxidize the surface and reduce seal strength. The coefficient of friction of the ML grade is affected by the slip additive; after 72 h at 23 °C and 50% RH, the film should reach a stable slip level, but early readings may be higher.

When Downgauging from 40 µm to 18 µm in Heavy-Duty Sack Applications

Downgauging heavy-duty sacks from 40 µm to 18 µm using Exceed Flow 0814ML is feasible only when the film fails by puncture rather than tear at the lower thickness. In a monolayer construction, the bending stiffness falls sharply with thickness; at 18 µm, sack handling may require a stiffer outer layer of HDPE or LDPE to prevent folding and blocking at the filling station. A three-layer structure with 20–30% LDPE skin and 70–80% 0814ML core balances melt strength, stiffness, and toughness. The film must be conditioned at 23 °C ± 2 °C and 50% ± 5% RH for at least 40 h per ASTM D618 before mechanical testing. At 18 µm, puncture resistance measured by ASTM D5748 is more relevant to field performance than dart impact; the film may show higher elongation in the transverse direction, and this anisotropy must be considered when designing bag dimensions. If the sack is used for frozen food, the film should be sealed at temperatures at least 10 °C above the seal initiation threshold to compensate for reduced molecular mobility at low temperatures.

Exceed Flow 0814ML is not designed for injection molding, rotational molding, or pipe extrusion. In these processes, the narrow molecular weight distribution and controlled melt elasticity may lead to surface defects, poor melt strength, or insufficient dimensional stability. The product is not recommended for use in contact with strong oxidizing agents, aromatic hydrocarbons, or chlorinated solvents at elevated temperature; such solvents can swell or plasticize the polyethylene. For outdoor agricultural film, UV-stabilized film can be produced by adding an appropriate UV masterbatch before extrusion, but the base resin does not contain a long-term outdoor weathering package. The information provided is based on publicly available datasheet values and general metallocene polyethylene behavior; specific regulatory status and additive contents should be confirmed with the current safety data sheet and product datasheet.

HS Code	327565
Polymer Type	Metallocene Linear Low Density Polyethylene (mLLDPE)
Comonomer	1-Hexene
Catalyst	Metallocene
Density	0.914 g/cm³
Melt Index 190 C 2 16 Kg	0.8 g/10 min
Peak Melting Temperature	116 °C
Crystallization Peak Temperature	100 °C
Vicat Softening Temperature	93 °C
Tensile Strength At Yield	8.8 MPa
Tensile Strength At Break	34 MPa
Elongation At Break	500%
1 Secant Modulus	172 MPa
Dart Drop Impact	200 g
Elmendorf Tear Strength Md	130 g
Elmendorf Tear Strength Td	350 g
Haze	6%
Gloss 45	75
Seal Initiation Temperature	95 °C
Hexane Extractables	<1.0%

Packing	ExxonMobil Exceed Flow mLLDPE 0814ML resin is packaged in 25 kg moisture-barrier polyethylene bags, palletized for industrial shipping and storage.
Container Loading (20′ FCL)	20′ FCL container loaded with ExxonMobil Exceed Flow mLLDPE 0814ML in sealed original packaging, palletized and secured for ocean freight.
Shipping	ExxonMobil Exceed Flow mLLDPE 0814ML is shipped as non-hazardous polyethylene resin pellets in moisture-resistant 25 kg bags or bulk containers. It is not regulated as dangerous goods. Keep containers closed, dry, and protected from direct sunlight and excessive heat during transport and storage.
Storage	Store in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, flames, and strong oxidizers. Keep original containers closed and pallets intact; avoid moisture, dust, and contamination. Use clean handling equipment and good housekeeping to prevent spills. Refer to the SDS and local regulations for complete storage and handling requirements.
Shelf Life	No defined shelf life; store in a cool, dry, well-ventilated area, away from direct sunlight and ignition sources.

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