ExxonMobil Exceed mLLDPE 1018MA
- Product Name: ExxonMobil Exceed mLLDPE 1018MA
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- ExxonMobil Exceed mLLDPE 1018MA is typically used in formulations when melt index and density and melt temperature and die pressure must be controlled within specific ranges.
| HS Code | 538353 |
| Product Name | ExxonMobil Exceed mLLDPE 1018MA |
| Polymer Type | Metallocene Linear Low Density Polyethylene (mLLDPE) |
| Comonomer | Hexene-1 |
| Density | 0.918 g/cm³ |
| Melt Index 190 C 2 16 Kg | 1.0 g/10 min |
| Peak Melting Temperature | 115 °C |
| Vicat Softening Temperature | 95 °C |
| Tensile Strength At Yield | 10 MPa |
| Tensile Strength At Break | 35 MPa |
| Elongation At Break | 500% |
| Flexural Modulus | 200 MPa |
| Dart Drop Impact | 500 g |
| Elmendorf Tear Strength Md | 200 g |
| Elmendorf Tear Strength Td | 400 g |
| Haze | 7% |
| Gloss 45 | 60 |
As an accredited ExxonMobil Exceed mLLDPE 1018MA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ExxonMobil Exceed mLLDPE 1018MA is supplied in 25 kg bags, typically palletized for industrial bulk shipment. |
| Container Loading (20′ FCL) | Typically a 20′ FCL loads approximately 22 MT of ExxonMobil Exceed mLLDPE 1018MA in 25 kg bags, palletized and shrink-wrapped. |
| Shipping | ExxonMobil Exceed mLLDPE 1018MA is a non-hazardous polyethylene resin, normally shipped as pellets in 25 kg bags, bulk bags, octabins, or bulk trucks/railcars. It is not regulated for transport. Keep packaging sealed, dry, and clean; avoid moisture, contamination, and direct sunlight. Follow local regulations and supplier instructions. Maintain moderate temperatures. |
| Storage | Store ExxonMobil Exceed mLLDPE 1018MA in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep original containers closed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure. Maintain ambient temperatures, typically below 50°C. Use first-in, first-out stock rotation, keeping away from incompatible materials. |
| Shelf Life | ExxonMobil Exceed mLLDPE 1018MA has a shelf life of approximately 24 months when stored cool and dry in original packaging. |
| Property | Test method | Value |
|---|---|---|
| Density | ISO 1183-1 / ASTM D1505 | 0.918 g/cm3 |
| Melt flow rate | ISO 1133-1:2022 / ASTM D1238 | 1.0 g/10 min |
| Dart drop impact | ASTM D1709-16 Method A | >800 g |
| Elmendorf tear, TD | ASTM D1922 | >350 g |
| Elmendorf tear, MD | ASTM D1922 | 200–300 g |
| Tensile stress at break, MD | ISO 527-3 | ~50 MPa |
| Elongation at break, MD | ISO 527-3 | >550% |
| Seal initiation temperature | ASTM F88 | ~88°C |
| Haze | ASTM D1003 | 8–12% |
Values in the table are typical manufacturer datasheet values for 25 µm blown film produced at a blow-up ratio of 2.5:1 and a die gap of 1.8 mm; they are not limiting specifications. The current product datasheet and certificate of analysis control for any commercial shipment.
When Downgauging Heavy-Duty Sacks Below 100 µm, What Controls Dart Impact Retention?
Because free-falling granular product impacts the filling spout and the side-wall, the limiting parameter is instrumented impact penetration rather than tensile yield. Converters producing 80 µm sacks from 1018MA on lines running at 180 kg/h observe that dart impact does not scale linearly with gauge. A 25 µm film may exceed 800 g under ASTM D1709-16 Method A, but an 80 µm structure should additionally be qualified with whole-sack drop testing under ISO 7965-2 at -20°C after filling. The directionality of Elmendorf tear is the critical failure mode at slit edges. In 25 µm film, transverse-direction tear typically exceeds 350 g per ASTM D1922, while machine-direction tear can fall below 200 g, so edge design and sealing frequency must be adjusted. To improve bubble stability, converters commonly blend 10 wt% to 30 wt% of LDPE with higher melt strength. This moves dart impact and tear into a non-linear trade-off zone where a 20 wt% LDPE addition may reduce dart impact by more than 30% while increasing transverse-direction tear by only 10%. The processing window for high-stalk extrusion of such blends is defined by melt temperature from 204°C to 225°C and blow-up ratio from 2.2:1 to 2.8:1. Outside this band, gauge variation exceeding ±5% per ISO 4593 increases the probability of split sacks on automatic palletisers. Downgauging below 80 µm is not recommended without moving to coextruded structures with high-density polyethylene skins, because weld-line strength at heat-sealed top closures becomes the controlling factor under ASTM F88.Coextrusion Viscosity Matching in PE//PE Structures
In three-layer PE//PE film, the viscosity ratio between the sealant skin containing 1018MA and the LDPE core must remain below 3:1 at the shear rate encountered in the die lip, often 100 s-1 to 500 s-1. Processors elevate the 1018MA skin melt temperature to 210°C to 230°C to lower viscosity and match a core LDPE of melt index 0.25 g/10 min to 0.50 g/10 min. A viscosity ratio exceeding 4:1 induces interfacial instability, visible as wavy sealant bands and die-line sharkskin. Layer-thickness control is verified by optical microscopy under ISO 23539; sealant layer thickness tolerances on five-layer lines are typically held to ±0.5 µm. Adhesion between the sealant layer and the adjacent polyethylene core does not require a tie resin for PE//PE structures, but corona treatment of the outer skin to surface energy above 40 mN/m per ASTM D2578 is required for lamination to polyester or aluminium foil. Extrusion lamination coatings at 25 g/m² to 35 g/m² use 1018MA to achieve seal strength above 4 N/15 mm after lamination to foil, a configuration common in dry food and spice sachet laminates. The narrow molecular weight distribution of metallocene resin means shear heating in the die is lower than for high-stress Ziegler-Natta grades. As a consequence, melt-temperature deviation at the die lip can be held within ±3°C when using a barrier screw with L/D 30:1. In recycle-oriented PE//PE packaging, the sealant layer density of 0.918 g/cm3 remains below the monomaterial recyclability threshold, and minor components including slip and antiblock are typically kept below 5 wt% to avoid interfering with film-grade mechanical recycling streams.Agricultural silage wrap and greenhouse covering require post-extrusion photostability when 1018MA is used as the base resin. The resin does not contain a UV-stability package, so converters compound 0.15 wt% to 0.35 wt% of a high-molecular-weight hindered amine light stabiliser and 0.05 wt% to 0.15 wt% of a phenolic antioxidant/phosphite blend before film blowing. Accelerated weathering under ISO 4892-3 using UVA-340 lamps at 0.76 W/m²/nm and a 60°C black-standard temperature is used to require at least 50% retained tensile elongation after 2000 h. At 150 µm thickness, puncture energy per ASTM D5748 should exceed 3 J to resist stalk puncture in baled silage. The high dart impact of 1018MA at 25 µm, above 800 g, supports thickness reduction from 180 µm to 150 µm on some baling lines without equivalent puncture loss. Film tensile properties per ISO 527-3 on 150 µm blown film typically register above 50 MPa in the machine direction and 45 MPa in the transverse direction; elongation at break exceeds 550% in both axes. Anti-fog or anti-drip additives at 10 wt% to 15 wt% masterbatch loading migrate to the surface over 24 h to 72 h and can reduce surface tension below 35 mN/m. These additives must not be compounded above their recommended let-down ratio because the MA slip package can accelerate blooming and increase haze. The operational boundary for greenhouse films is brittleness after multi-season exposure: retained dart impact below 150 g after 5000 h of weathering indicates chain scission and the onset of crack propagation under hail impact.
Stretch-Hood Film Requires a Separate Cling-Additive Design Layer
Stretch-hood pallet protection machines operate with pre-stretch ratios from 200% to 300%, storing elastic energy in the film before release over the load. 1018MA as an outer ply provides elongation at break above 600% under ISO 527-3 and machine-direction tensile stress above 50 MPa. The low long-chain branching content means recovery force after 1 h must be monitored with a creep test at 23°C and 50% RH. Converters specify a load-retention force not below 2.0 N/15 mm after 24 h to prevent pallet load loosening in transit. Cling agents are essential in the outer surface. Polyisobutylene at 0.5 wt% to 1.5 wt% and hydrocarbon tackifier at 1.0 wt% to 3.0 wt% are common. The medium slip additive in 1018MA reduces blocking but can compete with polyisobutylene migration, requiring a three-layer A-B-A structure with a slip-free core. At -20°C discharge, film stiffness rises. Dart impact tested after 24 h conditioning at -23°C per ASTM D1709 must remain above 300 g at 50 µm gauge. Production lines running stretch-hood film at 50 µm on high-stalk blown dies with 2.3:1 blow-up ratio typically hold gauge at ±4% across the web. Gauge deviations greater than this produce draw resonance during pre-stretch and load shift on the pallet. The operational boundary is edge tear. When the film is slit to roll widths below 500 mm, the machine-direction tear strength of 200 g to 300 g per ASTM D1922 is often insufficient for start-stop automated hooder cycles, requiring radius slitting and reduced line acceleration.Compounding 30 wt% PCR Without Filtration Limits
In dry-blending and compounding operations, post-consumer recyclate from commodity film scrap shifts melt rheology in a non-linear manner. The zero-shear viscosity of a 70:30 blend of 1018MA and washed PCR LLDPE is not a linear mass-weight average. Melt filtration through 100 mesh to 150 mesh screens at 200°C to 220°C is required to remove gels above 400 µm. Screen-pack change frequency typically increases from every 8 h to every 3 h when PCR content exceeds 25 wt%. Twin-screw compounding at L/D 40:1 and specific mechanical energy input of 0.18 kWh/kg to 0.25 kWh/kg disperses polyethylene contaminants but does not eliminate polypropylene or paper fibre inclusions. At 30 wt% PCR loading, blown film dart impact on 25 µm gauge is reduced by 20% to 40% from the virgin 1018MA value of 800 g. Elongation at break is typically retained above 500%, while machine-direction tensile strength may drop below 45 MPa. The melt flow rate under ISO 1133-1:2022 can shift upward by 0.2 g/10 min to 0.5 g/10 min depending on the thermal history of the PCR stream, requiring downstream die-pressure adjustment to maintain gauge. Processors should not exceed 50 wt% PCR in direct food-contact layers unless migration testing under EU 10/2011 and FDA 21 CFR 177.1520 is repeated for the specific recyclate lot. Published data for this specific configuration is limited, and batch-to-batch variation in PCR moisture and gel count imposes a ±5°C processing drift compensation on barrier-screw extruders.| Regulation / Standard | Scope | Conversion requirement |
|---|---|---|
| FDA 21 CFR 177.1520(c) 3.2a | Olefin polymers in contact with food | End-use migration testing per 21 CFR 175.300; all food types, Conditions of Use B through H |
| EU Regulation 10/2011 Annex I | Plastic materials in contact with food | Overall migration limit 10 mg/dm²; test per EN 1186-1 |
| REACH EC 1907/2006 | Chemical registration in EU | Article 33 SVHC declaration; no SVHC above 0.1% w/w |
| RoHS 2011/65/EU | Hazardous substances in electrical and electronic equipment | Not directly applicable to packaging; Pb, Hg, Cd, Cr6+, PBB, PBDE below 1000 ppm if mixed with EEE parts |
| ISO 14021 | Recycled content claims | Self-declared environmental claims; PE//PE monomaterial structure must be verified |
Rollstock for frozen vegetable and seafood packaging produced at 40 µm to 60 µm gauge exploits the low seal initiation temperature and cold-weather impact of 1018MA. Frozen food packing lines operate with jaw temperatures between 105°C and 125°C. Exceeding 135°C causes seal degradation in the presence of moisture and fat contamination at the seal area. Seal strength under ASTM F88 after 24 h storage at -18°C should remain above 2.0 N/15 mm. Packages filled with free-flowing frozen product are drop-tested at -18°C under ISO 7965-2 from 1.5 m without burst failure. The narrow molecular weight distribution of metallocene resin yields a sharper melting peak, which reduces the processing window to ±5°C at the seal jaw. Vertical form-fill-seal machines with PID temperature control hold this band, but older relay-controlled sealers can drift outside. Condensation on film during line shutdowns raises moisture content above 500 ppm, producing bubble instability and teardrop holes if the film re-enters the extrusion stream. Purging with virgin resin for 20 min at 220°C is standard after contamination events. Compliance for frozen food contact is established under FDA 21 CFR 177.1520(c) 3.2a and EU 10/2011. The resin contains no intentionally added BPA or phthalate plasticisers. The low-temperature brittleness point of polyethylene is below -70°C per ASTM D746. This is not the limiting parameter for frozen packages, which instead fail by seal-area crack propagation if hot tack is insufficient during filling.
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- ExxonMobil Exceed mLLDPE 1018MA is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
ExxonMobil Exceed mLLDPE 1018MA is a metallocene-catalyzed linear low density polyethylene grade used primarily in film conversion. The resin is an ethylene-hexene copolymer, and the designation encodes key product attributes: the “m” refers to metallocene catalysis, the 1018 series defines a nominal density of 0.918 g/cm³ and a nominal melt index of 1.0 g/10 min, and the MA suffix identifies a medium-antiblock additive package. Melt index is measured at 190°C under 2.16 kg load according to ASTM D1238; density is measured according to ASTM D1505. Peak melting point by differential scanning calorimetry is approximately 119°C using ISO 11357-3. These values are typical and are not specification limits. The medium-antiblock package is intended to reduce film-to-film blocking during winding and storage, but it does not automatically provide a controlled slip effect. Processors requesting specific coefficient of friction values should verify the slip additive content through the lot-specific certificate of analysis. The product is supplied as pellets and is normally converted on blown film lines for food packaging, heavy-duty sacks, frozen food overwrap, and form-fill-seal structures. In cast film operations, 1018MA is used for stretch wrap and lamination layers where puncture resistance and controlled blocking aid winder performance.
Within the 1018 density and melt-index family, the additive suffix is the principal differentiator. 1018MA carries a medium-antiblock loading; high-antiblock variants carry more antiblock and may be chosen for thick film or high-wind-tension rolls, but higher additive loading can alter optical and dart impact results. Grades without the same additive package should not be substituted into food-contact documentation without a comparative study because the additive identity may affect the specific migration profile and the surface coefficient of friction. When comparing technical data sheets, users should hold film thickness, blow-up ratio, frost line height, and air ring type constant; otherwise laboratory differences obscure the effect of the additive package.
How Does Metallocene Catalysis Change the Molecular Architecture of 1018MA?
Conventional Ziegler-Natta LLDPE is polymerized with multi-site catalysts that generate a broad distribution of molecular weight and comonomer incorporation. The result is a mixture of lightly branched, highly crystalline molecules and more highly branched, lower-crystallinity molecules. Metallocene catalysis with a single-site active center produces a narrower molecular weight distribution and a more uniform distribution of hexene along the polymer chain. For 1018MA, the practical consequence is a more controlled crystalline morphology after film quenching. Short-chain branches are placed more evenly across the molecular weight distribution, which reduces the dense, high-molecular-weight fractions that can raise stiffness while limiting tear propagation resistance. At equal thickness, film from 1018MA typically shows higher dart impact when tested by ASTM D1709A and higher Elmendorf tear propagation resistance when tested by ASTM D1922, compared with butene-based Ziegler-Natta LLDPE of equal nominal density and melt index. Published data for the specific medium-antiblock variant are limited, so comparative studies should be generated on the same film line because die gap, frost line height, and bubble cooling change orientation and can either amplify or erase the molecular architecture advantage.
On production blown film lines, the narrow molecular weight distribution reduces shear thinning. At high screw speed the melt does not thin as much as a broad-molecular-weight conventional LLDPE, so head pressure and extruder motor load can be higher on single-screw machines with length-to-diameter ratios of 24:1 to 32:1. Machines should be configured with barrier screws and spiral mandrel dies; grooved-feed throats are preferred if conveying is limiting. Die gaps below 1.5 mm increase the risk of shark-skin melt fracture at low melt temperatures. Typical die gaps for 1018MA blown film are 1.5 mm to 2.5 mm. Melt temperature should be held between 204°C and 232°C. If melt temperature falls below 190°C, unmelted resin and severe melt fracture can appear; prolonged excursions above 240°C produce oxidative degradation that becomes visible as gels and discoloration. Bubble stability is the main processing limitation because mLLDPE has lower melt strength than LDPE. On single-lip air ring lines without internal bubble control, blending with 10 wt% to 30 wt% LDPE is a common industrial method to suppress vertical oscillation and helical instability. Dual-lip air rings, internal bubble cooling, and blow-up ratios of 2.0 to 3.0 improve bubble stiffness and can reduce the need for blending. Frost line height should be adjusted after melt temperature and die gap are fixed, because moving the frost line changes the balance of machine-direction and transverse-direction shrinkage and tensile strength.
Blown Film Extrusion Conditions and Die Configuration Boundaries
Laboratory film data for mLLDPE grades are often generated on a 63.5 mm single-screw extruder with a 30:1 length-to-diameter ratio, a 100 mm annular die, a 1.5 mm die gap, and a blow-up ratio of 2.5:1. These conditions provide controlled comparisons but do not represent all production equipment. On narrower dies or highly stretched film towers, orientation effects can dominate and alter tear balance. The resin should be run with flat or progressively increasing barrel temperature profiles, not reverse profiles, unless the screw design specifically supports reverse staging. Purging from Ziegler-Natta LLDPE to metallocene LLDPE can require a longer transition because the lower shear thinning of 1018MA does not remove carbonized residue from screw root areas as effectively as broader-MWD purge resins. At the die lip, the low melt strength of 1018MA makes web tension more sensitive. Excessively low frost lines raise transverse orientation and may cause bubble splitting when thickness variation is present. The practical operating range for frost line height is therefore narrower than for LDPE, and changes should be made in small steps of 5 cm to 10 cm after the line is thermally stable.
When Cast Film Lines Run 1018MA at High Line Speeds
Cast film operation with 1018MA is established, but published data for high-speed cast configurations using this exact medium-antiblock variant are limited. General mLLDPE cast film practice places the flat die close to the chill roll to reduce neck-in; die-to-chill roll spacing is usually under 25 mm. Chill roll temperatures from 15°C to 30°C are used to quench the web quickly. Vacuum boxes, air knives, and edge pinners are necessary because the low melt strength of metallocene LLDPE increases the tendency to draw resonance at high take-off speeds. Melt temperatures in the range 232°C to 260°C are typical to prevent melt fracture in thin-gauge cast films. If edge pinning is insufficient, neck-in can exceed 20%, producing trimmed waste and uneven web tension. The medium-antiblock additive is designed to reduce blocking in wound film, but cast film tack may still need to be controlled through chill roll temperature and, if permitted by the end use and food-contact status, external slip additives.
Mechanical Performance Data Are Generated Under Controlled Laboratory Film Conditions
Film property data for 1018MA are measured by ASTM D882 for tensile properties, ASTM D1922 for Elmendorf tear, and ASTM D1709A for dart drop. Because the MA package includes medium antiblock, optical and surface properties differ from grades with lower or higher additive load. At 25 µm nominal thickness, the combination of dart impact and tear resistance supports downgauging studies in heavy-duty sacks and form-fill-seal structures. Comparative field evaluations on a 90 mm blown film line with a 30:1 length-to-diameter ratio and a 250 mm annular die have shown that impact-equivalent films can in some cases be produced at 10% to 20% lower gauge than conventional butene LLDPE; however, published data for the MA variant are limited and results depend on air ring type, frost line height, and film tower geometry. The user should not assume that a property measured on a laboratory line will transfer directly to a production line with different orientation and thermal quenching.
Seal initiation temperature for metallocene LLDPE with a density of 0.918 g/cm³ is generally lower than for Ziegler-Natta LLDPE of equivalent density because the narrower melting distribution creates a sharper endothermic peak. This can increase throughput in fixed-temperature seal-jaw machines. Published heat-seal values for 1018MA are lot-dependent; converters running high-speed vertical form-fill-seal lines should generate heat-seal curves using ASTM F88 and hot-tack curves using ASTM F1921 on the actual finished structure. The medium-antiblock additive may shift hot-tack performance slightly relative to no-antiblock grades, but this shift is usually smaller than the effect of film gauge, seal bar profile, and dwell time. Organoleptic performance should be tested on the finished film after corona treatment and lamination because post-treatments can generate low-molecular-weight oxidation products that are not present in the resin pellet feedstock.
Regulatory Documentation for Food-Contact and EU Packaging Applications
Compliance for food-contact use is not automatically transferable between additive variants. Resins in the 1018 series may be qualified under 21 CFR 177.1520(c) and EU Regulation 10/2011, but the converter must obtain a product-specific food-contact statement from ExxonMobil for the exact grade and lot. Safety data sheets provide REACH information under EC 1907/2006. For electrical and electronic packaging or documentation requests, suppliers may provide a declaration that the resin does not intentionally contain cadmium, lead, mercury, hexavalent chromium, PBB, or PBDE above the limits of Directive 2011/65/EU. These documents should be controlled as part of the converter’s raw-material qualification system. When the final package is used for food contact, the converter is responsible for validating overall migration and specific migration of additives in the finished structure under the intended time-temperature conditions.
| Regulatory framework | Reference | Required document |
|---|---|---|
| U.S. food-contact resin | 21 CFR 177.1520(c) | Product-specific food-contact statement |
| EU plastics food contact | EU Regulation 10/2011 | Declaration of compliance |
| REACH | EC 1907/2006 | Safety data sheet and exposure scenarios |
| RoHS | Directive 2011/65/EU | Supplier declaration |
Storage and handling boundaries for 1018MA are typical for polyolefin film resins. Pellets should be protected from direct UV exposure and strong oxidizing atmospheres. Moisture pickup is generally not a primary processing risk, but resin stored in unsealed silos at high ambient humidity may carry surface moisture. In such cases, drying is not normally required unless visible moisture or surface condensation is present; when drying is used, temperatures should remain below 50°C to prevent additive agglomeration. Melt temperatures above 240°C should be avoided during start-up, shutdown, and die changes. The medium-antiblock additive can interact with certain antistatic or fluoropolymer processing-aid packages; users should not mix dissimilar additive systems without trial runs. When starting with 1018MA on a line previously running LDPE or Ziegler-Natta LLDPE, a complete purge sequence with a purge compound formulated for metallocene LLDPE is preferred because a simple resin transition may leave gel-containing residues in die lines, screen packs, and die lips.
