| HS Code | 185768 |
| Density | 0.920 g/cm³ |
| Melt Flow Rate 190 C 2 16 Kg | 0.50 g/10min |
| Tensile Strength At Yield | 12 MPa |
| Tensile Strength At Break | 35 MPa |
| Elongation At Break | 900% |
| Vicat Softening Point | 105 °C |
| Melting Point | 124 °C |
| Dart Drop Impact F50 | 120 g |
| Haze | 14% |
| Gloss 45 | 50 |
As an accredited Luban LLDPE EFDC-7050 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Luban LLDPE EFDC-7050 is supplied in 25 kg polyethylene-lined woven bags, ensuring safe handling and moisture protection. |
| Container Loading (20′ FCL) | 20′ FCL: 20-foot container loaded with Luban LLDPE EFDC-7050 resin, safely packed in woven bags on pallets. |
| Shipping | Luban LLDPE EFDC-7050 is a linear low-density polyethylene resin supplied as virgin pellets. It ships as non-hazardous cargo in 25 kg bags, gaylord boxes, or bulk hopper trucks/containers. Keep packaging sealed and dry, avoiding prolonged UV exposure and high temperatures. Standard dry van or container transportation is suitable, with no special hazmat requirements. |
| Storage | Store Luban LLDPE EFDC-7050 in a dry, clean, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep original packaging sealed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure and excessive stacking. No special hazardous storage required; maintain moderate temperatures and handle carefully to preserve resin quality. |
| Shelf Life | Luban LLDPE EFDC-7050 has a shelf life of 12 months when stored in a cool, dry, well-ventilated area away from direct sunlight. |
In high-output blown film lines equipped with grooved-feed single-screw extruders with 30:1 L/D, Luban LLDPE EFDC-7050 is extruded for industrial can liners and bulk waste bags at melt temperatures of 190–220 °C and die head pressures maintained below 400 bar. The grade’s melt index, when confirmed by certificate of analysis under ISO 1133-1:2022 at 190 °C and 2.16 kg, is typically 2.0 g/10 min; this viscosity permits die gaps between 2.0 mm and 2.8 mm without provoking low-frequency melt fracture in monolayer structures. A blow-up ratio of 2.2:1 to 2.6:1 is maintained because machine-direction orientation increases rapidly below 2.0:1, while above 2.8:1 bubble flutter on iced air rings can generate gauge scatter exceeding ±8%. The frost line height is held at 6–9 die diameters, with nip rolls at 35–45 °C to stabilize film blocking without inducing surface haze above 12% as measured by ASTM D1003-13. For 75 µm liners, dart drop resistance is tested according to ASTM D1709-16a Method A; values for a C4 butene-based LLDPE of this class commonly lie between 140 g and 220 g, but the acceptance threshold must be linked to basis weight and layer segmentation because coextruded skin layers can raise dart values by 30–50 g without improving core toughness. Machine-direction Elmendorf tear measured by ASTM D1922-15 typically falls below transverse-direction tear by 20–40% due to process-induced orientation; when slit-edge failure is unacceptable, 15–25 wt% metallocene C8 LLDPE is dry-blended before the feed throat to shift the MD tear value above 4 N/mm. Heat-seal response is evaluated under ASTM F88/F88M-21 at 0.5 s dwell and jaw temperatures of 130–150 °C; hot-tack strength via ASTM F1921-18 becomes critical for vertical form-fill-seal lines running above 45 cycles/min. Gel counts are monitored by optical inspection systems aligned with ISO 18553:2002, with typical counts below 200 gels/1 m² when a 20/40/20 mesh screen pack is used, though catalyst residue variation can shift counts by ±50 gels/1 m² across production lots.
| Target film thickness | Die gap | Blow-up ratio | Frost line height | Melt temperature | Primary mechanical test |
|---|---|---|---|---|---|
| 20–25 µm lamination base | 1.8–2.2 mm | 2.4:1–2.8:1 | 5–7D | 195–215 °C | ASTM D882-18 |
| 75 µm liner | 2.3–2.8 mm | 2.2:1–2.6:1 | 6–9D | 190–210 °C | ASTM D1709-16a |
| 125–150 µm geomembrane cushion | 2.5–3.0 mm | 2.0:1–2.4:1 | 8–11D | 200–230 °C | ASTM D5748-19 |
Below a die gap of 2.0 mm, EFDC-7050 enters a high-shear regime on conventional LLDPE screw designs because the C4 branch distribution reduces the critical shear rate for onset of sharkskin melt fracture compared with hexene or octene resins. Capillary rheometry under ASTM D3835-16 at 190 °C shows entrance pressure loss and shear-thinning behavior that become unstable when apparent shear rate exceeds 600 s⁻¹ at melt temperatures below 200 °C. In thin-gauge 20–25 µm lamination base film, the bubble is stabilized by raising adapter and die temperatures to 210–230 °C while maintaining barrel profiles between 180 °C and 210 °C. A dual-lip air ring with iced air at 8–12 °C and dew point below -10 °C is required to control frost line height at 5–7 die diameters and prevent bubble sway. At this gauge, tensile elongation at break measured by ASTM D882-18 should remain above 400% in both machine and transverse directions; failure to maintain this value indicates excessive drawdown or degradation from melt temperatures above 240 °C. The finished lamination base film is evaluated for optical defects under ASTM D2457-13, with gloss values at 60° typically between 60 and 75 for blown LLDPE surfaces, depending on cooling air temperature and die lip cleanliness.
When woven polypropylene gusseted sacks are laminated for powdered cement and granular fertilizer, EFDC-7050 is extruded at a coating weight of 12–20 g/m² through a horizontal extruder with contact melt temperatures of 205–230 °C. The resin is compounded as a simple blend of 80–85 wt% EFDC-7050 with 15–20 wt% LDPE to reduce edge neck-in below 25 mm per side and improve melt-curtain stability; without the LDPE fraction, the low extensional viscosity of C4 LLDPE can cause curtain tear-off at line speeds above 120 m/min. Adhesion to the woven PP substrate requires corona treatment of the substrate to a surface energy of 40–46 dyn/cm according to ASTM D2578-23, or the LLDPE layer delaminates under ASTM D1876-08 peel testing at values below 3 N/15 mm. The final laminated sack is conditioned for 24 h at 23 °C and 50% RH before seal-strength verification according to ASTM F88/F88M-21; jaw temperatures of 130–145 °C are typical because the LLDPE skin fuses at lower temperature than the oriented PP tape underneath. Compliance for fertilizer contact is not automatic; the finished laminate must be evaluated against national packaging regulations for agrochemicals, and direct food contact use requires FDA 21 CFR 177.1520 and EU Regulation No. 10/2011 migration limits.
LLDPE cushion layers in waste-containment composite geomembranes are produced by blown film from EFDC-7050 at 125–150 µm thickness because the resin retains elongation under confining stress. Tensile properties measured by ASTM D6693-20 for geomembrane sheet should show elongation at break above 800% in both machine and transverse directions; EFDC-7050 contributes to this, but the seam strength of the final fabricated liner is dominated by wedge-welding parameters rather than resin alone. Puncture resistance is assessed by ASTM D5748-19; a 150 µm sheet of this class commonly exhibits values of 300–500 N, though the result varies with backing soil type and loading rate. Carbon black masterbatch is added at 2.5–3.0 wt% for UV stabilization, but the concentrate must be pre-dried at 80 °C for 4 h when exposed to RH > 60% because moisture at the microdispersion interface causes bubble pinholes during extrusion. Incompatibility with high-polarity tackifiers and amine-based additives is noted because such additives can accelerate oxidative degradation during high-shear processing; published data for EFDC-7050 in dual-texture surface coextrusion with VLDPE skins is limited.
A five-layer coextruded agricultural silage film composed of ULDPE skins, EFDC-7050 in the subskin layers, and EVA or ethylene-butyl acrylate as adhesive layers is used for high-cling bale wrap. The EFDC-7050 subskins are blended with 5–8 wt% metallocene plastomer to raise puncture propagation resistance evaluated by ASTM D5748-19; in the absence of plastomer, dart drop values for 35 µm film fall near 90–120 g and may propagate tears under bale-netting stresses. Oxygen transmission rate at 23 °C and 0% RH is measured by ASTM D3985-17 and is controlled by the barrier layer, not by EFDC-7050; the grade contributes less than 5% shift when the subskin thickness changes from 10 µm to 15 µm. UV stabilization uses hindered amine light stabilizer masterbatch at 1.0–1.5 wt% and UV absorber at 0.3–0.5 wt%, with pre-drying at 70 °C for 2 h when relative humidity exceeds 60%. The cling performance originates from polyisobutylene or ethylene-vinyl acetate-based tackifier resident in the outer ULDPE skins; migration of tackifier into EFDC-7050 subskins causes blocking and a coefficient of friction below 0.20 measured by ASTM D1894-14, which is managed by limiting tackifier addition to 2.0 wt% and adjusting cooling air temperature. The final bale-wrap tube seals repeatably under ASTM F88/F88M-21 at 120–140 °C and is specifically incompatible with amine-based antifog additives above 0.5 wt%, which shift seal initiation temperature upward by 5–8 °C.
For pallet stretch hood film produced at 150–200 µm, EFDC-7050 is not used as the sole resin because C4 LLDPE alone shows insufficient puncture and pre-stretch recovery. In production-scale cast film lines with 90 mm extruders and rotating nips, the grade is dry-blended at 20–40 wt% with metallocene C8 LLDPE and 5–10 wt% LDPE to balance cling and machine-direction elongation. Pre-stretch ratios above 250% are limited by the C4 fraction; beyond 280%, MD tensile elongation measured by ASTM D882-18 can drop below 200%, and the film shows whitening at deformation bands. Dart drop for 180 µm film measured by ASTM D1709-16a is typically above 800 g when the metallocene content exceeds 50 wt%, but with 40 wt% EFDC-7050 the value may fall to 600–750 g. The cling system uses 1.5–2.5 wt% PIB in the outer layers; at levels above 3.0 wt%, migration into the EFDC-7050-containing core over two weeks at 45 °C raises kinetic coefficient of friction measured by ASTM D1894-14 to above 0.65, producing unwind noise and edge tearing. Stretch hood equipment with pneumatic stretching grippers requires MD tensile modulus between 120 MPa and 180 MPa at 100 mm/min, measured by ISO 527-3:2018; EFDC-7050 at 20 wt% helps reduce film blocking without sacrificing seal integrity at the hood corners. The final hood is sealed with impulse welding at 190–210 °C; joint strength is conditioned for 24 h at 23 °C and 50% RH before ASTM F88/F88M-21 testing, with target values above 25 N/25 mm. The resin’s C4 branching also reduces crystalline melting point, so processing melt temperatures should be kept below 240 °C to avoid web splitting at the casting roll.
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Luban LLDPE EFDC-7050 is a linear low-density polyethylene resin based on a butene comonomer and supplied as translucent pellets for blown-film and cast-film conversion. The grade belongs to the LLDPE film family marketed under the Luban trade name. Supplier technical literature lists a nominal density of 0.918 g/cm³ when determined in accordance with ISO 1183-1:2019 and a melt mass-flow rate of 2.0 g/10 min at 190 °C under 2.16 kg load when tested according to ISO 1133-1:2022. The short-chain branching introduced by the butene comonomer interrupts crystallite formation, reduces film stiffness relative to high-density polyethylene, and increases tie-molecule density relative to low-density polyethylene. Compared with a hexene-based LLDPE of equivalent nominal density and melt mass-flow rate, Luban LLDPE EFDC-7050 generally exhibits lower dart drop impact and lower transverse-direction tear because butene branches are shorter and less effective at forming load-bearing interlamellar tie chains. The product is not a metallocene-catalyzed resin; haze, gloss, and hot-tack performance are therefore lower than those of mLLDPE film resins. Published data for this specific configuration is limited, and release values should be verified against the supplier certificate of analysis.
The primary application envelope includes heavy-duty sacks, general-purpose liners, agricultural film, and thin-gauge packaging where a combination of impact resistance, draw-down, and low gel count is specified. The resin is processed industrially on barrier-type extruders with L/D ratios from 25:1 to 30:1. Feed-throat temperature is typically maintained between 35 °C and 50 °C to prevent pellet agglomeration. The grade is compatible with gravimetric and volumetric dosing systems, but condensation on cold pellet surfaces should be removed before silo loading because surface moisture can reduce output stability in the feed zone. The product is not formulated for medical implant applications or pressure-pipe extrusion, and it should not be exposed to oxidizing acid environments at elevated service temperatures.
In high-stalk blown-film conversion, the principal processing limit is the balance between melt strength and draw resonance. The resin is typically processed with a blow-up ratio between 2.5:1 and 3.5:1 and a frost line height of 5 to 8 die diameters. On a 250 mm mono-layer die with a 2.0 mm die gap, die-specific output is commonly held between 1.2 and 1.8 kg/h per mm die circumference. Raising output beyond this range without increasing melt temperature can produce melt fracture at the die lip because apparent shear stress exceeds the critical value for the grade. The die entry angle and land length should be selected to keep apparent shear rate below the critical shear rate reported by the die supplier; for a 2.0 mm die gap, this requirement places an upper boundary on line speed before sharkskin or cyclic melt fracture appears. Melt temperature above 240 °C promotes oxidative chain scission and gel formation, while melt temperature below 175 °C increases melt pressure and reduces transverse tear strength. Pre-drying is not normally required. If pellets are stored under relative humidity above 60 % and transferred to a cold hopper, a dry-air purge or equivalent surface moisture control is recommended at the feed throat.
In extrusion lines equipped with internal bubble cooling and dual-lip air rings, bubble stability is governed primarily by air-ring pressure distribution rather than by resin melt strength alone. A three-layer line with a 75 mm grooved-feed core extruder, 30:1 L/D barrier screw, and 300 mm die with 1.8 mm die gap can run Luban LLDPE EFDC-7050 in the core layer at layer ratios up to 60 %. Edge trim from such lines is reprocessed at up to 15 wt% without significant loss of dart impact if the trim is dry and free of paper, metal, and high-temperature degradation gels. The main scale-up variable observed in production is not melt temperature but bubble cooling uniformity; asymmetric frost line height on a rotating die can produce gauge variation greater than ±5 %, reducing dart impact reproducibility according to ISO 7765-1:2005.
The following representative values are compiled from supplier technical literature and normalized to a 40 µm monolayer film produced on a 60 mm extruder with 30:1 L/D, 2.2 mm die gap, blow-up ratio 2.5:1, and melt temperature 200 °C. These values are not specification limits and vary with film fabrication parameters, additive package, and conditioning history.
| Property | Unit | Test method | Typical value |
|---|---|---|---|
| Density | g/cm³ | ISO 1183-1:2019 | 0.918 |
| Melt mass-flow rate (190 °C / 2.16 kg) | g/10 min | ISO 1133-1:2022 | 2.0 |
| Tensile yield stress (MD/TD) | MPa | ISO 527-3:2018 | 11 / 11 |
| Tensile break stress (MD/TD) | MPa | ISO 527-3:2018 | 36 / 30 |
| Elongation at break (MD/TD) | % | ISO 527-3:2018 | 750 / 850 |
| Dart drop impact, F50 (40 µm) | g | ISO 7765-1:2005 / ASTM D1709-22 | 100 |
| Elmendorf tear (MD/TD) | N | ISO 6383-2:1983 / ASTM D1922-23 | 1.8 / 3.6 |
| Haze | % | ASTM D1003-21 | 14 |
| Gloss at 60° | GU | ASTM D2457-21 | 55 |
Dart drop impact decreases as film gauge decreases. A 25 µm monolayer film may show an F50 reduction of 30 % to 40 % relative to the 40 µm reference because the plastic deformation zone becomes thinner and the film harder to decelerate under the dart. Elmendorf tear values should be evaluated after conditioning at 23 °C and 50 % relative humidity for a minimum of 48 h in accordance with ISO 291:2008. If the film contains recycled trim, dart impact retention generally remains above 90 % up to 15 wt% trim addition when the trim is free of oxidized gels. Additive interactions with slip or antiblock masterbatches should be evaluated on the converting line because migration kinetics in polyethylene matrices are concentration- and temperature-dependent.
In a three-layer heavy-duty sack structure with Luban LLDPE EFDC-7050 in the core at 60 % layer ratio and LDPE skins at 20 % each, the dart impact of a 75 µm film is generally higher than an LDPE-core equivalent because the linear backbone dissipates impact energy through larger plastic deformation. However, LDPE skins are retained to maintain transverse tear, heat-seal response, and surface smoothness. Replacing an LDPE core with Luban LLDPE EFDC-7050 can allow gauge reduction of 10 % to 15 % at equivalent dart impact, but the converter should validate seal-through-contamination performance because LLDPE sealing response is faster and more temperature-sensitive than LDPE. A 100 % EFDC-7050 monolayer sack film may show higher machine-direction shrinkage when exposed to temperatures above 65 °C, requiring adjustment of line tension and winder settings. Moisture vapor transmission rate is controlled by film gauge and orientation, not by resin type alone; the grade does not provide a separate barrier function.
Processing comparison with standard LDPE film grades shows that EFDC-7050 typically requires lower melt temperatures for equivalent bubble stability but higher torque at the same screw speed because its linear backbone transmits more viscous heating and shear stress. The use of a barrier screw with a Maddock mixing section is recommended when running at backpressure above 250 bar. Melt pressure at the entrance to the extrusion die is generally lower than for metallocene LLDPE of the same melt index, which reduces motor load and allows higher throughput on older blown-film lines without updated temperature control. The addition of polymer processing aids is not normally required, but if high backpressure is observed on a specific line, fluoropolymer-based process aids can reduce die deposit at levels of 0.02 % to 0.05 % by mass; such use should be validated for food contact compliance.
For agricultural film service, the bent-strip environmental stress cracking resistance according to ASTM D1693-15, condition B, with 10 % Igepal CO-630, is generally above 500 h for the natural resin. This resistance is relevant for greenhouse film and silage cover where pesticide concentrates, condensation, and mechanical folding occur. In formulations containing 2.0 wt% to 3.0 wt% carbon black masterbatch, ultraviolet resistance according to ASTM G154-23 must be verified at film level because carbon black dispersion in LLDPE matrices depends on screw mixing intensity. A 30:1 L/D barrier screw with a Maddock or distributive mixing section operated at shear rates between 100 s⁻¹ and 250 s⁻¹ is generally required to achieve agglomerate-free film below 20 µm. Without adequate dispersion, microvoid formation around agglomerates reduces tensile elongation and increases time-to-embrittlement variability. The grade is compatible with hindered amine light stabilizers and phenolic antioxidants. Direct liquid contact with acidic sulfur-bearing pesticides can accelerate stabilizer extraction and shorten film life; such service conditions require a separately stabilized film formulation rather than the unstabilized or lightly stabilized base resin.
In blown-film processing, molecular orientation differs along the machine and transverse directions because take-up speed, blow-up ratio, frost line height, and die gap interact to produce anisotropic chain alignment. At a blow-up ratio of 2.0:1, machine-direction tear is often higher than transverse-direction tear. At a blow-up ratio of 3.5:1, transverse-direction tear increases because transverse chain orientation increases. The representative table value of 1.8 N machine direction and 3.6 N transverse direction reflects a blow-up ratio of 2.5:1. This directionality is not a defect but a processing lever. Heavy-duty sack converters select blow-up ratio and frost line height to balance tear propagation resistance against impact and gauge uniformity. The Elmendorf values measured according to ISO 6383-2:1983 are sensitive to film gauge, test speed, and ambient humidity; comparisons between grades should be made at identical gauge and conditioning history.
Compliance for food contact applications is governed by FDA 21 CFR 177.1520 for olefin polymers, subject to extractive testing and end-use temperature conditions. European food contact use must be evaluated under EU Regulation (EU) No 10/2011 and the framework regulation EC No 1935/2004. The polymer as such is exempt from full registration under REACH (EC) No 1907/2006, while monomers and additives used in its manufacture are registered. Restrictions under RoHS 2011/65/EU should be confirmed by supplier declaration for the specific lot and packaging configuration. These regulatory references apply to the base resin; finished articles may require supplementary migration, organoleptic, and specific migration testing depending on film thickness, additive content, and intended food-contact conditions. The resin is not designed for use as a medical-grade material, implant component, or high-temperature sterilizable device material.
