ExxonMobil Exceed mLLDPE 1018FA
- Product Name: ExxonMobil Exceed mLLDPE 1018FA
- 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 1018FA is typically used in formulations when density and melt index and melt temperature and die pressure must be controlled within specific ranges.
| HS Code | 745514 |
| Polymer Type | Metallocene Linear Low Density Polyethylene (mLLDPE) |
| Density | 0.918 g/cm³ |
| Melt Index 190 C 2 16 Kg | 1.0 g/10 min |
| Peak Melting Temperature | 119 °C |
| Crystallization Temperature | 103 °C |
| Vicat Softening Temperature | 93 °C |
| Tensile Strength At Yield | 9.7 MPa |
| Tensile Strength At Break | 34.5 MPa |
| Elongation At Break | 600 % |
| Flexural Modulus | 200 MPa |
| Dart Drop Impact | 120 g |
| Elmendorf Tear Strength Md | 220 g |
| Elmendorf Tear Strength Td | 400 g |
| Haze | 7 % |
| Gloss 45 | 70 |
As an accredited ExxonMobil Exceed mLLDPE 1018FA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ExxonMobil Exceed mLLDPE 1018FA is packaged in 25 kg polyethylene bags, with 40 bags per 1,000 kg pallet. |
| Container Loading (20′ FCL) | Loaded as palletized 25 kg bags in a 20′ FCL container, keeping ExxonMobil Exceed mLLDPE 1018FA dry, clean, and secure. |
| Shipping | Not classified as dangerous goods. ExxonMobil Exceed mLLDPE 1018FA is shipped as a non-hazardous solid resin, typically in sealed 25 kg polyethylene bags or bulk containers, palletized and stretch-wrapped. Transport in clean, dry vehicles/containers away from moisture, contaminants, direct sunlight, and excessive heat. Follow supplier SDS and applicable regulations. |
| Storage | Store ExxonMobil Exceed mLLDPE 1018FA in a cool, dry, well-ventilated warehouse, in tightly closed original bags or clean, dry silos. Protect from direct sunlight, heat, moisture, and contamination. Keep away from ignition sources, oxidizers, and incompatible materials. Avoid prolonged high temperatures. Maintain good housekeeping to prevent pellet spills and slipping. Follow local regulations and supplier safety data sheet. |
| Shelf Life | Shelf life is typically 24 months when stored unopened in original packaging under cool, dry conditions, away from direct sunlight. |
On a 3,500 mm wide cast film line equipped with a 30:1 L/D barrier screw and dual-layer feedblock, substitution of 30–50 wt% conventional butene LLDPE with 1018FA in the core layer shifts transverse direction tensile elongation variance to 4–6% at 23 µm nominal gauge, as registered under ASTM D882-18. The melt index of 1.0 g/10 min (ISO 1133-1:2022, 190 °C, 2.16 kg) and density of 0.918 g/cm³ define pumping-zone back pressure at 180–260 bar; when back pressure drifts below 150 bar, melt homogeneity defects appear as ovalized gels in the cling layer and cling force varies by more than 15% across web width. The melt curtain exits a slot die at 235–250 °C and contacts a chill roll held at 18–22 °C, producing a quench rate of 60–80 K/s at a line speed of 350–650 m/min and a die gap of 0.6–0.9 mm. The addition ratio in two-layer cast construction places 15–25 wt% 1018FA in the cling layer with 45–60 wt% ULDPE or plastomer and 15–25 wt% EVA, while the core layer runs 30–50 wt% 1018FA with the balance butene LLDPE and LDPE. Compliance for pallet wrap used as secondary industrial packaging does not require a direct food-contact declaration; however, where the film is placed near consumer goods in EU warehouses, converter documentation follows REACH Regulation (EC) No 1907/2006 Article 33 SVHC communication and, if food contact is anticipated, FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm². Corona treatment is held at 34–42 dyn/cm to anchor water-based inks and label adhesives; below 32 dyn/cm, ink abrasion failure appears within 50 km of industrial pre-stretch cycling. The terminal product range includes machine pallet wrap with 250–500% pre-stretch, hand stretch wrap, vented pallet wrap with edge slitting, and black UV-stabilized wrap for outdoor rail shipments.
Why Does Seal Initiation Temperature Drop 12–15 K in High-BUR Frozen-Food Blown Film?
In high-blow-up-ratio blown film for quick-frozen vegetable and poultry packaging, 1018FA supplied as 100% or as an 80/20 wt% blend with LDPE lowers seal initiation temperature to 90–103 °C because the metallocene LLDPE produces a broader interlamellar melting distribution than butene LLDPE of equivalent density. The addition ratio in a three-layer line places 70–80 wt% 1018FA in the bulk layer, 60–70 wt% in the seal layer, and 10–15 wt% HDPE in the outer skin for machine-direction tear and gloss control. At 50 µm thickness, dart impact under ASTM D1709-15a remains above 400 g, while Elmendorf tear under ASTM D1922-15 in machine direction remains 200–250 gf; if machine-direction tear drops below 180 gf, film splitting occurs during vertical form-fill-seal jaw draw at −20 °C. The blown film process operates at a 2.5:1 blow-up ratio, a 1.6–2.0 mm die gap, and a frost line height of 500–800 mm with internal bubble cooling air at 5–10 °C. Melt temperature is capped at 195–210 °C; exceeding 215 °C increases gel count from ≤1 gel per 100 kg to 3–5 gels per 100 kg and generates seal-contaminating specks in 60–80 m/min FFS lines. Compliance for direct frozen-food contact rests on FDA 21 CFR 177.1520(c) olefin polymers and EU Regulation (EU) No 10/2011 Annex I with an overall migration limit of 10 mg/dm²; slip/antiblock masterbatch in the skin layer is limited to 0.5–1.0 wt%. The terminal product family includes frozen vegetable pillow pouches, quick-frozen seafood bags, ice cream pouches, and modified-atmosphere lidding webs where antifog additive is incorporated in the skin layer.
Heavy-duty form-fill-seal conversion of granular urea and polyethylene resin at fill rates of 60–90 sacks per hour requires a film that survives a 2.0 m free-fall drop at −25 °C after contact with crystalline product. In such lines, 50–80 wt% 1018FA is loaded into the middle layer of a three-layer coextruded sack, with 10–20 wt% HDPE for static stiffness and 10–20 wt% butene LLDPE for edge trim recyclability. The blown film line operates at a 2.0–2.2:1 blow-up ratio, a 2.0–2.4 mm die gap, and a gusseted collapsing frame producing 350–500 mm layflat width. At 80 µm thickness, transverse direction elongation under ISO 527-3 remains above 700%, and dart impact under ASTM D1709-15a exceeds 700 g; below 45 wt% 1018FA, impact failure at the bottom seal occurs after 3–5 drops of filled sacks in gravity-fed packing lines. Compliance for non-food chemical and fertilizer sacks does not require food-contact standards; instead, REACH Regulation (EC) No 1907/2006 Article 33 SVHC communication and 94/62/EC Packaging and Packaging Waste Directive recovery requirements are referenced in EU tender documents. The terminal product range includes urea sacks, petrochemical export bags, polyolefin resin bags, and building-material sacks for 25–50 kg fill weights such as gypsum and calcium carbonate.
Sealant Web Design in Three-Layer Lamination for Stand-Up Pouches
A sealant web produced from 70–90 wt% 1018FA and 10–30 wt% LDPE is used in adhesive lamination against oriented PET or BOPP for coffee and snack pouches because the mLLDPE fraction widens the hot-tack plateau to 110–135 °C; this prevents seal pop-open during vertical fill when sachet drop speeds exceed 120 units/min. The addition ratio in the skin layers avoids plastomer above 20 wt%, as higher plastomer content reduces interlayer bonding at the lamination nip and raises haze to 8–12% measured under ASTM D1003-21. Compliance is anchored to FDA 21 CFR 177.1520(c) olefin polymers and EU Regulation (EU) No 10/2011 Annex I with an overall migration limit of 10 mg/dm²; the short-chain comonomer in this mLLDPE is not assigned a specific migration limit in Annex I, so the converter applies the overall migration limit and worst-case fatty food simulant D2. Sealant film is produced either on a cast line at 50–80 µm gauge with 0.8–1.2 mm die gap, or on a blown line at 80–120 µm gauge with 2.0–2.3:1 blow-up ratio, then corona-treated to 38–44 dyn/cm immediately before adhesive lamination. Heat-seal settings on horizontal pouch lines use 140–155 °C, 0.4–0.6 MPa jaw pressure, and 0.5–1.0 s dwell time; seal strength tested under ASTM F88/F88M-15 falls between 15–25 N/15 mm. The terminal product families include stand-up pouches for ground coffee, snack sachets, detergent refill pouches, and frozen ready-meal lidding films where the sealant layer is not exposed to retort temperatures above 121 °C.
| Segment | Standard designation | Critical parameter | Operator boundary |
|---|---|---|---|
| Cast pallet stretch film | ASTM D5748-19; ASTM D5458-12; FDA 21 CFR 177.1520(c) | Puncture ≥ 35 N/mm; cling 50–150 g; OML 10 mg/dm² | Back pressure 150 bar minimum |
| Frozen-food blown film | ASTM D1709-15a; ASTM D1922-15; EU 10/2011 | Dart ≥ 400 g; MD tear ≥ 180 gf; OML 10 mg/dm² | Melt temperature ≤ 215 °C |
| Heavy-duty sacks | ISO 7965-1; ISO 527-3; REACH Art. 33 | Drop 2.0 m at −25 °C; TD elongation ≥ 700% | 1018FA ≥ 45 wt% in core |
| Lamination sealant web | FDA 21 CFR 177.1520(c); EU 10/2011; ASTM F88/F88M-15 | Seal strength 15–25 N/15 mm; OML 10 mg/dm² | Plastomer ≤ 20 wt% in skin |
| Silage film | EN 13207:2001; EN 13206:2017 | Puncture 55–65 N/mm at −5 °C | Pre-stretch ≤ 70% |
| Collation shrink film | ASTM D2732-14; FDA 21 CFR 177.1520(c) | TD shrink ≥ 70%; gauge 45–60 µm | Seal jaw ≤ 175 °C |
When Silage Film Is Stretched Over Fermented Bale Edges at −5°C
In silage wrap production, the addition of 30–40 wt% 1018FA to the outer skin of a three-layer cast film shifts the cold-temperature puncture threshold at −5 °C from 35 N/mm to 55–65 N/mm as measured under EN 13207:2001, while the core layer uses 40–60 wt% VLDPE or EVA with 10–20 wt% 1018FA for cling consistency and unwind tension. The film is processed on a cast line at 250–300 m/min, slot die gap 0.7–1.0 mm, chill roll 16–20 °C, with integral slitting and edge trim recover. Pre-stretch during wrapping is limited to 55–70%; above 70%, the film relaxes below 30 N peripheral tension after 24 h and oxygen ingress exceeds 1.0% of bale volume per day. Compliance for agricultural film does not require food-contact migration limits, but EN 13207:2001 governs silage film oxygen permeability and EN 13206:2017 covers agricultural covering film durability and light transmission. The terminal product range includes dairy silage bale wrap, silage clamp top covers, and slit edge strips for maize silage sealing in bunker clamps.
Collation Shrink Film Gauge Uniformity and Burn-Through Thresholds
In collation shrink for bottled beverage multipacks, 15–30 wt% 1018FA is blended with 50–70 wt% LDPE and 10–20 wt% EVA to improve puncture resistance and seal integrity at 45–60 µm gauge without reducing unrestrained transverse direction shrink below 70% under ASTM D2732-14. The double-bubble process uses a first bubble water quench at 15–20 °C, in-line orientation at 4.0:1 machine direction and 5.0:1 transverse direction, and a second bubble annealing at 75–85 °C to stabilize residual shrink. Burn-through occurs at seal jaw temperatures above 175 °C when web thickness is below 40 µm; operators therefore hold seal wire temperature at 150–165 °C with a dwell time of 0.2–0.4 s. Food-contact compliance for shrink film used as secondary packaging around cans and bottles is limited to FDA 21 CFR 177.1520(c) olefin polymers, and EU Regulation (EU) No 10/2011 is applied when the film is part of a retail multipack that contacts the outer food container. Terminal products include printed collation shrink for 6-pack, 12-pack, and 24-pack beverage configurations, can multipacks, and tray overwrap for tissue rolls.
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- ExxonMobil Exceed mLLDPE 1018FA 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 1018FA is a metallocene-catalyzed ethylene-1-hexene copolymer with a nominal density of 0.918 g/cm³ (ASTM D1505 / ISO 1183) and a melt index of 1.0 g/10 min (ASTM D1238 / ISO 1133-1:2022, 190 °C/2.16 kg). The grade is supplied in pellet form and is specified primarily for blown film extrusion, where the metallocene catalyst architecture produces a narrower molecular weight distribution and a more uniform short-chain branching distribution than conventional Ziegler-Natta linear low density polyethylene. These structural differences affect solidified film morphology, seal behavior, and melt rheology. The 1018FA designation is supplier nomenclature; manufacturers should verify density, melt index, and additive package against the lot-specific certificate of analysis, because additive content and minor lot-to-lot variation can shift extrusion parameters.
What processing constraints emerge in blown film conversion?
On air-cooled monolayer blown film lines, metallocene LLDPE of this density class is typically processed through single-screw extruders with 24:1 to 30:1 L/D and barrier screws equipped with spiral or Maddock mixing elements. Die gap selection is a primary lever: gaps in the 1.8 mm to 2.4 mm range are commonly used for mLLDPE to reduce shear stress and delay sharkskin, whereas conventional LLDPE may run at narrower gaps. Die diameter, die lip construction, and air ring design influence bubble stability. A blow-up ratio of 2.0:1 to 2.8:1 and frost line height adjusted to produce oriented but not overcooled film are typical starting conditions. Published product-specific bubble stability limits for 1018FA are limited, so line trials are required.
Compared with a Ziegler-Natta LLDPE of the same melt index, 1018FA exhibits lower melt tension and lower zero-shear viscosity due to the absence of the high molecular weight tail and long-chain branching. In production, this manifests as bubble sag, flutter, and draw resonance on poorly stabilized lines, particularly at high neck heights or when the frost line is not controlled. Processors commonly add 5–20 wt% LDPE to increase melt strength; the addition also raises haze and reduces dart impact. Internal bubble cooling and dual-lip air rings can restore gauge uniformity at higher output, but they alter cooling rate and therefore crystallite size distribution, which affects optical properties. Grade-changeover purging from conventional LLDPE to 1018FA should include an LDPE purge of melt index 2.0 g/10 min or lower to reduce gel carryover and die-lip contamination.
Melt discharge temperatures are generally maintained in the 190 °C to 220 °C band for 0.918 g/cm³ mLLDPE film operations. Extended residence time above 230 °C can reduce heat stabilization performance, shift color, and increase odor potential. Screw speed, back pressure, and melt pressure must be monitored because metallocene resins can generate higher melt pressure at the die due to shear response; screen pack selection and breaker plate design affect residence time distribution and gel formation. The use of a melt pump is common on high-output lines to decouple extruder output from die pressure and to damp pressure fluctuations that would otherwise produce gauge bands.
Mechanical and optical property evaluation standards
Film performance is assessed at fixed gauge and fabrication conditions because comparisons across gauges are not meaningful. Tensile properties are determined according to ASTM D882; dart impact by ASTM D1709, Method A or Method B depending on expected energy; Elmendorf tear by ASTM D1922; puncture resistance by ASTM D5748 where relevant; and optical properties by ASTM D1003 for haze and ASTM D2457 for gloss. The supplier technical datasheet may report typical values for a 25 µm or 50 µm film; those values are not product specifications unless labelled as such and vary with blow-up ratio, die gap, output, cooling rate, and masterbatch content. Metallocene LLDPE films of similar density and melt index to 1018FA generally show higher dart impact and Elmendorf tear resistance and lower haze than Ziegler-Natta LLDPE, but the numerical advantage changes with orientation, where higher blow-up ratio increases the MD/TD balance and can flatten or reduce differences.
Seal properties are measured by ASTM F88 for seal strength and ASTM F1921 for hot-tack. Metallocene LLDPE resins often provide a lower seal initiation temperature and a wider hot-tack window than conventionally catalyzed LLDPE due to uniform comonomer incorporation. The exact seal initiation temperature for 1018FA should be taken from grade-specific technical data or generated on the target packaging line, because seal bar pressure, dwell time, film gauge, and contamination affect the result. Dart impact and tear data should not be transferred from one film line to another without verifying gauge distribution with a capacitance or beta gauge.
Comparative gel permeation chromatography of metallocene LLDPE and conventional Ziegler-Natta LLDPE indicates that the metallocene architecture reduces polydispersity index to roughly 2.0–3.0, while conventional LLDPE typically falls between 3.5 and 5.0. The lower fraction of very low molecular weight chains in 1018FA contributes to reduced extractable content and lower odor in food packaging relative to broad-distribution LLDPE of equivalent density. The reduction in the very high molecular weight tail, however, lowers melt strength and can reduce stress crack resistance in thick parts; in thin film applications this trade-off is generally acceptable because orientation and gauge uniformity dominate. Unlike LDPE, 1018FA lacks substantial long-chain branching, which explains the lower melt strength but also contributes to improved clarity and downgauging potential in monolayer and coextruded film structures.
When 1018FA is selected for sealant or multilayer film structures
In coextruded film structures, 1018FA may be used as a sealant web, toughness layer, or skin layer where a density of 0.918 g/cm³ provides lower seal initiation than higher-density grades. Coextrusion with HDPE or PP requires attention to interfacial adhesion and melt viscosity matching; tie resins are used for incompatible layers. The narrow molecular weight distribution of 1018FA yields a steeper viscosity-temperature response than conventional LLDPE, so melt temperature variation across the die can cause gauge nonuniformity if the die body is not uniformly heated. Bolted die zones, internal deckles, and edge encapsulation are practical measures on production lines.
Typical packaging applications reported for Exceed mLLDPE in this density and melt index class include food-contact films, heavy-duty sacks, liners, and lamination films. Published data for 1018FA-specific performance in each application is limited; therefore, qualification must include film fabrication on the target line, seal testing on the target packaging machine, and migration testing if the article is intended for food contact. Processors should not extrapolate hot-tack or seal-strength values from other metallocene grades without verifying the additive package, because slip and antiblock levels affect seal initiation and coefficient of friction.
Compliance verification must be performed against the supplier product stewardship bulletin and the specific regulatory article. The table below records the primary frameworks under which olefin polymer food-contact and product compliance are typically assessed. Food-contact compliance for the resin does not automatically transfer to the fabricated article; additive decomposition products, printing inks, adhesives, and processing conditions must be evaluated for the final structure.
| Framework | Designation | Application to 1018FA |
|---|---|---|
| U.S. food contact | 21 CFR 177.1520 | Olefin polymers for food-contact articles; compliance depends on density, additive package, and conditions of use. |
| EU plastics food contact | Regulation (EU) No 10/2011 | Overall migration limit 10 mg/dm²; specific migration limits apply to additives and monomers. |
| REACH | Regulation (EC) No 1907/2006 | Polymer exemption under Article 2(9); imported articles may require SVHC screening. |
| RoHS | Directive 2011/65/EU | Restricted substances Pb, Hg, Cd, Cr(VI), PBB, and PBDE are not intentionally added to raw polyethylene; final article testing is required only for electrical and electronic equipment scope. |
Moisture uptake in polyolefin pellets is negligible under normal warehouse conditions. However, if pellets are transferred from cold storage to a humid production room, surface condensation can introduce water into the feed throat, producing surface defects and bubbles in film. Drying in a desiccant or hot-air hopper at 60 °C to 80 °C for 4 h may be used when relative humidity exceeds 60% or when condensation is observed. The resin should be protected from prolonged exposure to ultraviolet radiation because unstabilized polyethylene undergoes chain scission and loss of elongation at break; outdoor use requires carbon black or UV stabilizer masterbatch. Continuous-service temperature is not defined solely by density; oxidative induction time testing by ASTM D3895 is recommended where warm or humid environments are expected. At temperatures above 80 °C, mechanical stiffness and short-term strength decline, and antioxidant depletion accelerates.
