| HS Code | 907446 |
| Melt Flow Rate 190 C 2 16 Kg | 2.0 g/10 min |
| Density | 0.920 g/cm³ |
| Tensile Strength At Yield | 12.0 MPa |
| Elongation At Break | 500% |
| Flexural Modulus | 300 MPa |
| Vicat Softening Point | 100 °C |
| Melting Point | 122 °C |
| Brittleness Temperature | -75 °C |
| Environmental Stress Cracking Resistance F50 | >1000 h |
| Shore D Hardness | 48 |
As an accredited Dushanzi Petrochemical LLDPE LL0209AA factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Dushanzi Petrochemical LLDPE LL0209AA is packaged in 25 kg woven bags with moisture-proof liners, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): LLDPE LL0209AA packed in 25kg bags, palletized and shrink-wrapped, about 20 metric tons per container. |
| Shipping | Dushanzi Petrochemical LLDPE LL0209AA is a linear low-density polyethylene resin, supplied as virgin pellets in 25kg bags, jumbo bags, or bulk containers. It ships as non-hazardous cargo via truck, rail, or sea freight. Protect from moisture, direct sunlight, and excessive heat during transport and storage. |
| Storage | Store Dushanzi Petrochemical LLDPE LL0209AA in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep packaging sealed to prevent moisture contamination and dust accumulation. No special hazardous storage conditions required, but maintain good housekeeping and avoid prolonged exposure to temperatures above 50°C. |
| Shelf Life | Store in a cool, dry, well-ventilated area away from sunlight. Shelf life is typically 12 months from date of delivery. |
Dushanzi Petrochemical LLDPE LL0209AA is a butene-copolymer linear low-density polyethylene film grade with a typical melt index of 0.9 g/10 min measured to ASTM D1238-20 at 190 °C/2.16 kg and a nominal density of 0.920 g/cm³ measured to ASTM D1505-18. Standard blown-film extrusion configurations operate within a melt temperature window of 200–225 °C and a die gap range of 1.2–2.4 mm. The downstream scenarios below are restricted to proven LLDPE film markets: agricultural cover and mulch sheeting, heavy-duty form-fill-seal sacks, frozen-food sealant webs, cast hand-stretch film, and refuse/compost sack liners. Addition ratios are stated as weight percent of the total film layer or as phr for additive masterbatches. EU importers must confirm registration under REACH EC 1907/2006 for the imported polymer substance before placing the material on the market.
For agricultural greenhouse cover and low-tunnel sheeting, LL0209AA is typically specified at 70–80 wt% of the total film formulation, with a 0.2–0.5 g/10 min LDPE film grade at 15–25 wt% and a UV/HALS/anti-fog masterbatch at 3–6 wt%. The LDPE component raises melt strength in the stalk region; below 15 wt% LDPE, bubble diameter oscillation of ±5% has been observed on 65 mm grooved-feed extruders with L/D 30:1 barrier screws when the frost line is raised above 500 mm. Finished film compliance is anchored to EN 13206:2017 for thermoplastic cover films in agricultural and horticultural use, with tensile properties tested to ISO 527-3:2018 and ASTM D882-18, and artificial weathering of UV-stabilized covers tested to ISO 4892-2:2013. Extrusion takes place through a spiral mandrel die of 250–350 mm diameter, die gap 1.6–2.4 mm, blow-up ratio 2.8–3.5, and melt temperature 215–225 °C. On lines with dual-lip air rings, a higher LL0209AA content shifts the frost line upward by 50–100 mm at constant output; operators compensate with internal bubble cooling or by reducing blow-up ratio from 3.5 to 3.0 to avoid bubble flapping. The processed sheet is converted into greenhouse films, low-tunnel covers, and early-crop forcing films in thicknesses from 80 μm to 120 μm. Hopper drying is not routinely required for material stored below 60% relative humidity, but surface moisture on granulate fed from outdoor silos in sub-zero conditions can create bubble spears and pinhole defects.
Heavy-duty form-fill-seal sack conversion places LL0209AA in the core layer of a three-layer coextrusion at 30–50 wt% of total film mass, while the outer layers carry a 0.2–0.5 g/10 min LDPE at 20–25 wt% each and the balance is recycled clean edge trim from the same line. The outer-layer LDPE maintains heat-seal strength and avoids the hot-bar tack observed when the butene-copolymer LLDPE exceeds 15 wt% in the skin. Compliance testing for this application uses ASTM D1709-15a dart drop impact and ASTM D1922-15a Elmendorf tear, with tensile properties measured to ISO 527-3:2018. Downstream production is carried out on a three-layer blown-film line with extruder sizes of 70 mm/80 mm/70 mm, L/D 30:1, a 350 mm spiral mandrel die, die gap 1.8–2.2 mm, blow-up ratio 2.2–2.8, and melt temperature 210–215 °C. Internal bubble cooling is used to stabilize the frost line because the middle-layer LL0209AA reduces bubble stability relative to straight LDPE at the same output. After calibration, the film is corona-treated to 38–42 mN/m for printing and converted into form-fill-seal sacks for petrochemical granules, fertilizer, agricultural chemicals, and FIBC liners. Seal initiation on the final structure occurs between 110 °C and 120 °C; if the outer-layer LL0209AA content is raised above 15 wt%, seal-bar release becomes irregular at sealing speeds above 1,200 bags/h, and coated or PTFE-separated sealing jaws are required.
In frozen-food barrier packaging, LL0209AA functions as a sealant-layer modifier in coextruded structures where the adjacent barrier core contains EVOH or polyamide and the sealant layer comprises 40–50 wt% LL0209AA, 50–60 wt% LDPE, and 1–2 wt% antiblock masterbatch. The resin contributes low-temperature flexibility because its 0.920 g/cm³ density reduces crystallinity relative to HDPE-based sealants; dart impact of the finished laminate at −20 °C is measured under ASTM D1709-15a Method A and is more sensitive to tie-layer thickness than to LL0209AA content within the 40–50 wt% band. Regulatory compliance for food-contact use rests on FDA 21 CFR 177.1520(c) 3.1b for olefin polymers and EU Regulation 10/2011, with the overall migration limit of 10 mg/dm² and simulant selection determined by the intended frozen-food matrix. Downstream production is performed on a five-layer blown-film coextrusion line with die gap 1.5–2.0 mm, blow-up ratio 2.0–2.5, melt temperature 215–225 °C, and a 250–300 mm die. The film is converted into IQF vegetable pouches, frozen seafood bags, and block-frozen food liners with total thickness from 60 μm to 90 μm. Hot-tack performance at 120 °C is lower than that of octene-based mLLDPE films; vertical form-fill-seal lines running seal temperatures above 125 °C or seal dwell times below 0.3 s may require a thicker sealant layer or a plastomer blend to maintain jaw release. Published data for this specific LL0209AA formulation in high-speed VFFS freezer lines is limited.
A monolayer agricultural mulch film built from 100 parts LL0209AA, 4–7 phr carbon black masterbatch, and 0.5–1.0 phr anti-block/slip masterbatch is processed on a 45–65 mm single-screw line with die gap 1.4–2.0 mm and blow-up ratio 2.5–3.0, yielding film thicknesses from 8 μm to 25 μm. The screen pack is typically 80/120/80 mesh to trap oxidized gel particles from the carbon black concentrate; if the screen pack is absent or opened above 120 mesh, black specks above 10 μm become pinhole nucleation sites during mechanical laying. Compliance for this application is commonly tested to GB/T 4455-2019 for polyethylene blown film used in agriculture, with tensile elongation measured to ISO 527-3:2018 and tear resistance to ASTM D1922-15a. The melt temperature is kept at 200–215 °C; below 195 °C, the combination of carbon black and LL0209AA raises melt pressure and can produce melt fracture at film thicknesses below 12 μm. The terminal products are black and white mulch films, fumigation films, and temporary soil-cover sheets for early vegetable forcing. A practical boundary is the 8 μm lower thickness limit; below this gauge, converter yield losses from pinholes increase sharply unless the carbon black masterbatch is dispersion-controlled to a particle size below 5 μm.
LL0209AA is confined to skin layers or a cost-reduced core component at 20–30 wt% in cast hand-stretch film formulations, with the balance being 60–70 wt% octene-based mLLDPE and 10 wt% LDPE. The butene copolymer lowers raw-material cost and provides adequate cling after corona treatment but increases neck-in relative to octene-based grades; on a 2.5 m cast die with a 0.5–0.8 mm die gap and chill-roll temperature 18–22 °C, edge trim can rise from 5% to 8% when LL0209AA approaches 30 wt%. The production line typically uses a 75–90 mm extruder with L/D 30:1 and a barrier screw, and line speeds of 300–600 m/min. The resulting film is converted into manual hand-stretch rolls, furniture wrapping, and bundling film with thicknesses between 15 μm and 25 μm. Stretch performance is measured under ASTM D4649-20 or by converter-specific ultimate stretch protocols; formulations containing 30 wt% LL0209AA generally deliver 120–180% manual-applied stretch, below the 200–250% pre-stretch commonly required for machine-grade pallet wrapping. This operational boundary defines the grade’s role: it is not formulated for high-speed pre-stretch machines above 200% elongation, where octene-based mLLDPE or plastomer-modified structures are required to avoid film breakage and inconsistent core tension.
Extrusion of 200–300 L refuse sacks and compost bags uses LL0209AA at 40–60 wt% blended with 20–30 wt% prime LDPE and 20–30 wt% clean post-industrial recycled polyethylene from the same production site. The post-industrial recyclate lowers melt strength, but the LL0209AA phase restores bubble stability in monolayer blown-film lines when the recycle fraction does not exceed 30 wt%. Final sack requirements are tested to EN 13592:2017 for household refuse sacks, with tensile strength and elongation measured under ISO 527-3:2018 and ASTM D882-18. Processing takes place on a 50–70 mm monolayer blown-film extruder with L/D 28:1–30:1, die gap 1.2–1.8 mm, blow-up ratio 3.0–4.0, and melt temperature 195–210 °C. The film is run at 50–100 μm thickness and converted into refuse sacks, compost bags, and industrial liners by impulse or hot-bar sealing. Above 60 wt% LL0209AA, the bubble becomes sensitive to high-blow-up-ratio tearing at the frost line; below 40 wt%, the recycled LDPE phase can dominate and reduce tear resistance in machine-direction slitting.
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LL0209AA is a linear low density polyethylene resin supplied by Dushanzi Petrochemical as pelletized material for general-purpose film conversion. The grade is positioned in the C4-LLDPE film segment and is produced with 1-butene as the principal comonomer. Its nominal melt mass-flow rate is 2.0 g/10 min when measured at 190 °C under 2.16 kg load according to ISO 1133-1:2022, and its nominal density is 920 kg/m³ according to ISO 1183-1:2019. These two indices define the processing behavior of the resin in blown and cast film extrusion: the density indicates a semi-crystalline ethylene copolymer with short-chain branches, while the MFR value indicates a viscosity that permits draw-down on conventional single-screw equipment without excessive motor load. Reactor technology details for this specific grade are not routinely disclosed in public technical literature; the product is therefore assessed through its rheological and mechanical data rather than catalyst architecture.
Producer literature identifies LL0209AA for agricultural mulch film, greenhouse covering, general-purpose liner film, heavy-duty sacks, and coextruded packaging structures. Published data for specialty high-clarity cast-film, freezer packaging, or high-purity solvent-contact configurations is limited. Converters evaluating the grade for these uses should not assume that nominal resin properties transfer directly to finished film performance without confirming the relationship on their own equipment.
Because olefin film resin properties are method-dependent, the values below are typical producer data and should not be interpreted as specification limits. Tensile values are obtained on compression-molded specimens according to the cited standard; blown film values may differ according to gauge, blow-up ratio, frost line height, die temperature, and post-extrusion conditioning history. Property tests should be repeated on the converter’s line under the designated test methods.
| Property | Unit | Typical value | Test method |
|---|---|---|---|
| Melt mass-flow rate, 190 °C/2.16 kg | g/10 min | 2.0 | ISO 1133-1:2022 |
| Density | kg/m³ | 920 | ISO 1183-1:2019 |
| Tensile stress at yield | MPa | 11 | ISO 527-2:2012 |
| Tensile elongation at break | % | 500 | ISO 527-2:2012 |
The omission of dart impact, Elmendorf tear, and haze from this table is deliberate. These quantities are film-property values that depend on extrusion conditions, film gauge, and conditioning history; a single-point value without the associated processing profile would be unreliable. Converters should obtain conditioning-dependent data from a 25 µm or 50 µm film specimen produced under defined bubble geometry and chill-roll conditions, using ASTM D1709-16a for dart drop and ASTM D1922-15 for Elmendorf tear.
In addition to the international methods, Chinese converters may encounter equivalent national test standards in domestic certificates of analysis. The melt mass-flow rate may be reported under GB/T 3682.1-2018 and density under GB/T 1033.2-2010. Differences between ISO and GB/T procedures are generally small for polyethylene, but the test temperature, load, and specimen conditioning must be identical before a converter compares batch data from different laboratories.
Extrusion guidelines for blown film equipment place the die melt temperature between 185 °C and 220 °C. On a 65 mm single-screw extruder with 30:1 L/D barrier screw, barrel temperature profiles from feed throat to die are commonly set at 160 °C, 175 °C, 185 °C, 195 °C, and 205 °C. At these settings the melt pressure at the die may range from 25 MPa to 35 MPa, depending on die gap, screen pack, and screw speed. Linear low density polyethylene resins such as LL0209AA exhibit less shear thinning than branched LDPE resins, so back pressure remains higher at equivalent output rates. This condition becomes a processing bottleneck when a converter installs an excessively restrictive mixing section or fine filtration mesh: melt temperature rises due to viscous dissipation, and surface defects may appear as sharkskin or melt fracture.
Recommended blow-up ratio lies between 2.0:1 and 2.8:1. At blow-up ratios above 3.2:1, bubble flutter and instability are frequently observed on conventional single-lip air rings unless the frost line is lowered or the melt temperature is reduced. Frost line height for 25–50 µm film is typically maintained at 1.0–1.5 m on a 50 mm annular die with 1.0 mm die gap. If the frost line is raised above 2.0 m, the extended cooling time increases machine-direction orientation and may reduce transverse tear resistance measured by ISO 6383-2.
For cast film lines, the same MFR value is compatible with slot die extrusion at melt temperatures between 210 °C and 240 °C. The chill-roll temperature is commonly held at 25–35 °C, and the air gap is adjusted from 10 mm to 20 mm to control neck-in. Published data for LL0209AA on high-output cast film lines with 2.0 m die width is limited; converters should verify neck-in and edge trim losses during initial trials.
The difference originates in molecular architecture. High-pressure LDPE contains long-chain branching, which enhances shear thinning and reduces viscosity under high shear; LL0209AA has a linear backbone with only short-chain branches from 1-butene, so its viscosity drops less sharply when shear rate increases. The practical consequence is that at melt temperatures below 190 °C, LL0209AA may show higher die pressure and higher motor load than LDPE at the same screw speed. Converter trials on 45 mm and 65 mm extruders should monitor melt pressure and motor amperage during start-up; a pressure increase greater than 5 MPa relative to the equipment baseline for LDPE indicates that the screw profile is not providing sufficient shear thinning. In such cases, raising the rear barrel zone temperature by 5–10 °C reduces feed-throat bridging and lowers melt pressure without increasing gel formation, provided the die temperature remains below 220 °C.
The melt fracture threshold of LL0209AA is also lower than that of LDPE on the same die. When the wall shear stress at the die lip exceeds the critical value, sharkskin appears on the film surface. If surface defects persist after optimizing melt temperature and die gap, a fluoroelastomer-based polymer processing aid is added at 200–500 ppm; the lower end is typically sufficient for cast film, while the upper end may be required for high-BUR blown film at 3.0:1 or above. The processing aid must be predispersed or added through a masterbatch to avoid plate-out on the die lip.
In comparison with high-pressure LDPE film grades, LL0209AA typically provides higher tensile stress at yield and stress at break at equivalent film gauge, but lower melt strength and lower melt elasticity. In coextrusion, a common structure places LDPE in the skin layers and LL0209AA in the core. The LDPE skin contributes bubble stability and heat-seal response, while the LL0209AA core contributes tensile strength and permits total thickness reduction. Calibration trials on a 3-layer blown film line with 20/60/20 weight distribution are common, but the optimum ratio is gauge-dependent and must be confirmed by film tests according to ASTM D1709-16a and ASTM D1922-15.
Relative to 1-hexene and 1-octene linear low density polyethylene resins, the 1-butene comonomer in LL0209AA yields a less effective tie-molecule enhancement for a given density because the short-chain branch length is shorter and the lamellar thickness distribution is less favorable for impact resistance. Published data for this specific configuration is limited, but the general trend is that a 1-octene LLDPE film of equal density and MFR will show higher dart impact and puncture resistance; however, 1-butene grades may be selected when the application prioritizes stiffness, lower resin cost, or source availability over maximum toughness.
The difference in comonomer type also affects seal initiation temperature. In heat-seal tests on film specimens, 1-butene LLDPE grades often require a slightly higher seal initiation temperature than 1-octene grades at the same density. Converters should establish the final sealing window on the packaging line, because seal bar pressure, dwell time, and film gauge change the measured value. The relevant standard for heat-seal strength is ASTM F88/F88M-21; for hot-tack, ASTM F1921/F1921M-20 may be applied.
1-Butene comonomer incorporation is sufficient for many general-purpose films but imposes boundaries in applications requiring extreme low-temperature toughness or high Elmendorf tear. At low temperatures, films based on 1-butene LLDPE grades often exhibit a more rapid loss of impact strength than 1-hexene or 1-octene grades, particularly when the density is above 918 kg/m³. For freezer packaging or ice-contact applications, converter validation should include dart impact at −10 °C and film tear after conditioning at −20 °C for 48 h, using ASTM D1709-16a and ASTM D1922-15 respectively. If the measured tear falls below the product acceptance threshold, blending with 15–30 wt% of a 1-hexene or 1-octene LLDPE may be required; this blend modification alters bubble stability and must be re-optimized for blow-up ratio and frost line height.
For agricultural mulch film and greenhouse covering, the relevant mechanical weaknesses are not only low-temperature impact but also retained elongation after ultraviolet aging. LL0209AA as supplied does not contain sufficient UV stabilization for long-term outdoor service. The converter must add a hindered amine light stabilizer package and, in many formulations, a carbon black masterbatch for low-light-transmission mulch film. Aging performance is evaluated by ISO 4892-2 or ASTM D4329-21 followed by tensile testing according to ISO 527-2:2012. Published data for the specific stabilization package in LL0209AA is limited, and end users should request batch-specific accelerated aging results from the compounder.
Agricultural mulch film production with LL0209AA generally uses a 3-layer coextrusion structure at total thickness from 15 µm to 25 µm. The outer layer may contain UV stabilizer masterbatch at 5–8 wt%; the core layer can be LL0209AA without filler or with processing aid to control die-lip buildup. On high-output lines with 80 mm extruders and 250 kg/h output, die melt temperatures are often limited to 210 °C to avoid oxidative gel streaks at the screen pack. Heavy-duty sack film at 100–150 µm gauge uses LL0209AA as a blend component with LDPE or recycled polyethylene; at recycle addition above 20 wt%, the variability of melt flow rate of the recycle stream can dominate process stability, and in-line melt filtration below 100 µm mesh is recommended.
Lamination and general-purpose liner film operations often run LL0209AA in a monolayer or coextruded structure at thicknesses below 50 µm. In these applications, the resin’s density and MFR combination supports draw-down at moderate line speeds. However, film blocking and coefficient of friction should be controlled with anti-block and slip additives at low addition levels appropriate for the intended contact surface. The additive package is not specified here because it must be selected for the converting line and final end use; excess slip can degrade heat-seal strength measured by ASTM F88/F88M-21.
LL0209AA is hydrophobic and normally does not require pre-drying before film extrusion when stored in sealed containers at ambient relative humidity below 60%. If bags are opened and exposed to relative humidity above 70% for more than 24 h, surface moisture can be conveyed into the feed throat and produce surface roughness, microvoids, or die-lip deposits. In coastal or monsoon-season plants, hopper dryers set to 70–80 °C for 2–3 h are used only when visual surface defects indicate moisture pick-up; continuous drying is generally unnecessary and may increase oxidation if the drying air has excessive oxygen content. The resin should not be stored in direct sunlight or in contact with oxidizing agents, and it should not be blended with flame-retardant masterbatches based on halogenated compounds unless the converter has verified the thermal stabilizer package can tolerate the resulting acid evolution.
If hopper blending with LDPE or recycle is performed, the blend must be homogenized before entering the feed throat. Uneven feed composition can produce film gauge bands and differential haze across the web. When adding liquid slip or antistatic agents, direct injection into the feed zone should be avoided because local lubricant concentrations can reduce solid conveying and cause feed-throat surging. The use of side feed or gravimetric masterbatch dosing at the feed throat is preferred for additive levels below 1 wt%.
For food-contact packaging, compliance of the final film must be established under the relevant jurisdiction. LL0209AA is not automatically cleared for direct food contact because conversion conditions, additives, and migration behavior of the finished article control the regulatory status. Candidate references include FDA 21 CFR 177.1520 for olefin polymers, EU Regulation 10/2011 for plastics intended to contact food, and GB 4806.6-2016 for food-contact plastic materials in China. Converters should obtain a conformity statement from the resin producer and perform overall migration and specific migration tests on the finished package; published data for this specific configuration is limited. The grade is not intended for medical implant, parenteral fluid, or high-purity solvent contact unless independently validated.
For export to jurisdictions requiring REACH registration, the converter should verify the registration status of the supplied material and any additives through the safety data sheet. RoHS Directive 2011/65/EU is normally not applicable to the raw polymer, but it may apply to finished electrical or electronic packaging components if the packaging is retained with the product. These regulatory statements are not a substitute for a certificate of compliance from the producer.
