| HS Code | 481902 |
| Density | 0.920 g/cm³ |
| Melt Flow Index | 2.0 g/10 min (190°C, 2.16 kg) |
| Melting Point | 122 °C |
| Vicat Softening Point | 100 °C |
| Tensile Strength At Yield | 10 MPa |
| Elongation At Break | 500% |
| Flexural Modulus | 260 MPa |
| Shore Hardness D | 50 |
| Brittleness Temperature | -70 °C |
| Environmental Stress Crack Resistance | >500 hours |
As an accredited Relene LLDPE J1020FA20 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Relene LLDPE J1020FA20 is packed in 25 kg multi-wall paper bags with polyethylene inner lining, on shrink-wrapped pallets. |
| Container Loading (20′ FCL) | 20′ FCL loaded with Relene LLDPE J1020FA20 in 25 kg bags on shrink-wrapped pallets, approximately 20 metric tons net weight. |
| Shipping | Relene LLDPE J1020FA20 is a linear low-density polyethylene grade supplied as free-flowing pellets. Ship in clean, dry containers or woven polypropylene bags, protected from moisture and direct sunlight. Avoid high temperatures and sharp objects. Not classified as dangerous goods under standard transport regulations. Keep away from ignition sources during handling. |
| Storage | Store Relene LLDPE J1020FA20 in a cool, dry, well-ventilated area, away from direct sunlight, heat, and open flames. Keep packaging sealed to prevent moisture, dust, and contamination. Avoid stacking excessively high. Follow safe handling practices to minimize dust accumulation. Proper storage ensures consistent processing and product quality. |
| Shelf Life | Shelf life is typically 12 months from manufacture if stored in original, unopened packaging under dry, cool conditions. |
In high-speed form-fill-seal sack lines running 55–75 sacks/min, gauge variation across the side gusset is the primary cause of burst failures in 70–100 µm mono-layer sacks. Relene LLDPE J1020FA20, with nominal melt index 2.0 g/10 min (ASTM D1238, 190 °C/2.16 kg) and nominal density 0.920 g/cm³ (ASTM D1505), is processed on grooved-feed extruders with L/D 30:1 to maintain melt pressure above 180 bar and to minimize surging. The formulation for chemical granule sacks typically uses 100 wt% J1020FA20, or 85 wt% J1020FA20 blended with 15 wt% LDPE of MI 0.3–0.5 g/10 min, to lower bubble instability at frost line heights of 450–800 mm. The film is produced on a blown-film line with die gap 1.8–2.4 mm, BUR 2.5–3.5, and melt temperature 190–210 °C; a high-stalk bubble configuration increases machine-direction orientation before the frost line. Compliance for sacks carrying solid dangerous goods is governed by UN 5H4 drop-test protocols, with a drop height of 1.2 m for Packing Group II; for general industrial use, tensile and dart impact are typically verified to ASTM D882 and ASTM D1709, with a minimum dart drop of 800 g at 80 µm film thickness. Finished goods include side-gusseted sacks for polymer pellets, carbon black, fertilizers, and construction chemicals, where seal strength at the gusset fold must exceed 30 N/15 mm after ASTM F88 heat-seal testing. Melt temperatures above 220 °C generate oxidative gels, while temperatures below 180 °C increase die-lip melt fracture and weaken seal integrity.
Field data from multi-season greenhouse installations indicate that failure in 180–200 µm greenhouse film originates at the intersection of roof steel and film, where repeated wind flutter causes flex-cracking. J1020FA20 is formulated for agricultural film as 70–80 wt% base resin blended with 20–30 wt% LDPE of MI 0.25–0.4 g/10 min to increase bubble stability on wide-web lines; HALS UV stabilizer masterbatch is added at 0.5–1.5 wt%, and anti-drip/anti-fog concentrates at 2–4 wt% where condensation control is required. For silage covers, carbon black masterbatch is dosed at 3–5 wt% to reach opacity sufficient to suppress photodegradation. Downstream processing on three-layer coextrusion blown-film lines uses die diameters 350–450 mm, die gaps 1.8–2.4 mm, BUR 2.5–3.0, and melt temperatures of 185–205 °C; output rates of 250–400 kg/h are typical when internal bubble cooling is fitted. Compliance for these films is anchored to EN 13206:2017 for thermoplastic films for agricultural and horticultural use, with tensile properties verified to ISO 527-3 and trouser tear to ISO 6383-2. Terminal product forms include greenhouse cladding, low-tunnel covers, silage sheets, and mulch films; additive levels above 1.5 wt% of HALS concentrate are not recommended because plate-out on the die lips degrades optical clarity and creates slip-induced bubble collapse.
Lamination converters selecting a butene-copolymer LLDPE for the sealant web in flexible food packaging typically specify a melt index of 2.0 g/10 min to balance drawdown and heat-seal strength. Relene LLDPE J1020FA20 is extruded at 100 wt% or blended at 80 wt% with 20 wt% LDPE of MI 0.3–0.5 g/10 min to suppress neck-in and draw resonance at coating weights of 15–30 g/m². Slip and anti-block additives are incorporated as masterbatch: erucamide at 500–1000 ppm and synthetic silica at 1500–2500 ppm, with the upper slip limit bounded by migration to the lamination interface, which can reduce bond strength below 2 N/15 mm after 14 days of storage. Lamination is run on cast-film or blown-film lines with die temperature 210–230 °C, air gap 120–200 mm, and line speeds of 150–300 m/min; corona treatment to 38–42 dynes/cm is applied immediately before adhesion to solvent-based or solvent-free laminating adhesives. Food-contact compliance rests on FDA 21 CFR 177.1520(c) olefin polymers and EU Regulation (EU) No 10/2011 Annex I, with overall migration not to exceed 10 mg/dm² under the intended food simulant. Published comparative data for J1020FA20 in coextruded sealant webs with metallocene grades is limited; converter trials are required to establish seal initiation and hot-tack after 6 weeks of erucamide migration. Terminal product types include stand-up pouches, dry-food sachets, personal-care single-dose packs, and liquid detergent refill pouches.
In institutional waste collection, puncture failures appear most frequently at the bottom seal, where a gusset-fold concentration and calender embossing weaken the film. J1020FA20 is used at 70–80 wt% blended with 20–30 wt% post-industrial reclaim, with carbon black masterbatch at 2–4 wt% for black liners and slip/anti-block concentrate at 2–3 wt% to keep the coefficient of friction below 0.4 when tested to ASTM D1894. Single-layer blown-film extrusion runs on grooved-feed extruders with L/D 28:1, die gap 1.5–2.2 mm, BUR 3.0–4.5, and melt temperature 180–200 °C; a high-stalk bubble height of 5–8 die diameters improves dart impact in 25–80 µm film. Compliance for household and institutional liners is assessed to EN 13592:2017 for dimensions, dart impact, and tear; ASTM D1709 and ASTM D1922 are used for incoming lot release in North American specifications. Reclaim content above 30 wt% reduces dart impact below 400 g at 50 µm, and hopper drying at 65 °C for 2 h is applied when ambient relative humidity exceeds 70%. Terminal product types include liners for hospital, airport, commercial kitchen, and construction debris applications, where side-seal and bottom-seal failure must not occur below 25 N/25 mm tensile strength in the machine direction.
Running long-stalk bubbles at 120–180 kg/h, bag converters observe that die-lip melt fracture can be suppressed by raising die temperature to 210 °C, but this penalizes bubble stability and heat-seal initiation. J1020FA20 is formulated in carrier bag film at 60–70 wt% with 30–40 wt% LDPE of MI 0.3 g/10 min to increase stiffness and clarity; erucamide slip is added at 300–700 ppm and silica anti-block at 1000–2000 ppm. The blown-film process uses die gap 1.2–1.8 mm, BUR 3.0–4.0, and melt temperature 175–195 °C; die temperatures above 210 °C produce oxidative gel and reduce film tear resistance. Downstream bag conversion employs servo-driven heat sealing at jaw temperature 150–180 °C and dwell 0.3–0.5 s; seal strength is verified to ASTM F88 and tensile to ISO 527-3. Compliance for heavy metals in packaging is governed by EU Directive 94/62/EC, with total lead, cadmium, mercury, and hexavalent chromium not exceeding 100 ppm. Terminal product types include T-shirt bags, produce bags, bread bags, and boutique carry-out bags; melt fracture at shear rates above 800 s⁻¹ occurs unless die gap is enlarged or die temperature raised, creating a process window that must be re-validated when recycled content exceeds 20 wt%.
At inner liner thickness below 100 µm, gel defects and heat-seal contamination are the two dominant rejection causes in bag-in-box filling lines. J1020FA20 is specified at 100 wt% for low-cost monolayer liners, or 70–80 wt% with 20–30 wt% metallocene LLDPE to enhance puncture resistance; EVA with vinyl acetate content 12–18% is added at 5–10 wt% when seal initiation below 85 °C is required. The film is produced by cast or blown extrusion at gauge 80–150 µm, die gap 1.5–2.0 mm, and melt temperature 190–210 °C; heat-seal strength is measured to ASTM F88, with a seal initiation temperature of 110–125 °C for unmodified J1020FA20 monolayer film. Food-contact liners comply with FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011, while dangerous goods inner liners follow UN 6HA1 composite packaging drop-test protocols and leakproofness tests. Storage of corona-treated film beyond 30 days before sealing is not recommended because additive bloom shifts seal initiation upward and can cause channel leaks. Terminal product types include bag-in-box liners for sauces, edible oils, industrial chemicals, and aseptic liquid packaging.
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Relene LLDPE J1020FA20 is a butene-copolymer linear low-density polyethylene film resin supplied by Reliance Industries Limited for general-purpose blown-film and cast-film conversion. The grade is identified by a nominal melt flow index of 2.0 g/10 min determined at 190 °C under 2.16 kg load in accordance with ISO 1133-1:2022 or ASTM D1238-20, and a nominal density of 0.920 g/cm3 measured by ISO 1183-1:2019 or ASTM D1505. In this grade designation, the 2.0 flow value positions the resin for moderate shear processing while retaining enough melt strength for bubble stability; the 0.920 g/cm3 density sits in the low-density segment and limits crystallinity to levels that preserve puncture resistance and drawability. The short-chain branching introduced by the butene comonomer disrupts polyethylene chain folding more than high-pressure long-chain branching does, so at equivalent density the linear-low-density backbone retains higher tensile strength and significantly better environmental stress crack resistance than high-pressure LDPE, while sacrificing melt elasticity and gloss.
The following table consolidates representative property ranges for butene-copolymer LLDPE film grades with a nominal 2.0 g/10 min melt flow index and 0.920 g/cm3 density. These are class-typical reference values from published film-resin data and are not certified lot-specific limits. Converters should treat them as screening data only and confirm each batch against the supplier’s certificate of analysis.
| Property | Test method | Unit | Representative range |
|---|---|---|---|
| Melt flow index | ISO 1133-1:2022 / ASTM D1238-20 | g/10 min | 1.9–2.1 |
| Density | ISO 1183-1:2019 / ASTM D1505 | g/cm3 | 0.918–0.922 |
| Peak melting temperature | ISO 11357-3:2018 | °C | 120–124 |
| Tensile yield strength, machine direction | ASTM D882 | MPa | 9–11 |
| Tensile yield strength, transverse direction | ASTM D882 | MPa | 8–10 |
| Elongation at break, MD/TD | ASTM D882 | % | 700–900 |
| Dart impact, F50 | ASTM D1709 Method A | g | 80–120 |
| Haze | ASTM D1003 | % | 8–16 |
| Gloss, 45° | ASTM D2457 | GU | 55–75 |
| Coefficient of friction, film/film | ASTM D1894 | dimensionless | 0.15–0.35 |
For mechanical performance, tensile properties are typically measured on 50 µm blown film conditioned at 23 ± 2 °C and 50 ± 5% RH for at least 40 h according to ISO 291. The machine-direction yield strength in class-typical data normally falls between 9 MPa and 11 MPa, while dart impact values range from 80 g to 120 g under ASTM D1709 Method A. Such ranges support use in medium-duty liners and packaging films but do not alone qualify the resin for heavy-gauge industrial dunnage without film-level validation.
In blown-film extrusion, the operational ceiling for J1020FA20 is usually governed by melt elasticity and bubble stability rather than plastication capacity. A standard 45 mm single-screw extruder with a 24:1 L/D barrier screw and a 150 mm die can process this resin at a barrel profile of 170–200 °C and a die temperature of 200–220 °C, but the lower shear thinning of LLDPE relative to high-pressure LDPE increases die pressure and motor load at the same throughput. The conventionally recommended die gap for butene-LLDPE is 1.2–2.0 mm, with a blow-up ratio of 2.0:1–3.0:1 and frost-line height set at approximately 1.5–2.5 times the die diameter. Under these conditions, bubble instability in the form of helical wobble or draw resonance often appears when line speed is raised beyond the resin’s melt-strength limit; the practical response is to blend 10–30 wt% high-pressure LDPE, widen the die gap slightly, or reduce melt temperature. Published field data for this exact grade is limited, but the described behaviour is class-typical for butene-LLDPE of 2.0 g/10 min MFI and 0.920 g/cm3 density as documented in blown-film extrusion literature.
At a blow-up ratio of 2.5:1 and film thickness of 50 µm, class-typical output on a 45 mm blown-film line is often constrained to 30–45 kg/h because of bubble instability. Above that range, the addition of 20 wt% LDPE or the use of a dual-lip air ring can raise output by roughly 10–20% in plant-scale trials of comparable butene-LLDPE grades. The exact response of J1020FA20 depends on die diameter, air-ring geometry, and ambient cooling conditions; published machine-specific data for this configuration is limited.
Film thicknesses from 25 µm to 120 µm are appropriate for general-purpose packaging, garment bags, industrial liners, and agricultural films. The combination of 2.0 g/10 min melt flow index and 0.920 g/cm3 density provides a balance between extruder throughput and mechanical integrity for these uses. However, high-clarity shrink or display films should not be selected solely on the basis of this grade because the relatively broad composition distribution of conventional butene-copolymer LLDPE produces higher haze and lower gloss than metallocene or octene-based grades. The film-surface additive package, if present, also influences print adhesion and heat-seal behaviour; corona treatment to a surface energy of 38–42 mN/m is typically required before solvent-based printing or lamination.
Cast-film converting with J1020FA20 requires melt temperatures in the 180–230 °C range, a flat die gap of 0.5–1.0 mm, and a chill-roll temperature held within ±5 °C of the setpoint, commonly 20–40 °C. The linear backbone reduces draw resonance relative to higher-MFI film grades, but neck-in at the die exit is more severe than with high-pressure LDPE. Edge encapsulation, increased die width, or a small addition of LDPE can compensate for width loss. On a 65 mm 30:1 L/D extruder with a barrier screw, the screw torque at 100% LLDPE is typically higher than with LDPE at the same output; adding 15 wt% LDPE can restore a safe torque margin in class-typical cast-film operations. Rapid cooling on the chill roll increases film line speed but can create asymmetric crystallinity and blocking if the roll temperature is not uniform. These operating margins are inferred from cast-film processing of similar butene-LLDPE grades, because published machine-specific data for J1020FA20 is limited.
The melt flow index of 2.0 g/10 min is a low-shear melt characterisation value. At typical film extrusion apparent shear rates of 100–1,000 s-1, capillary rheometry performed in accordance with ISO 11443:2021 shows that LLDPE of this flow class can exhibit a viscosity 30–60% higher than high-pressure LDPE of equivalent melt index. That viscosity difference explains the higher die pressure and motor load observed on conventional film extruders when replacing LDPE with J1020FA20. It also contributes to the more pronounced sharkskin tendency of LLDPE at high apparent wall shear stress, typically beginning in the range of 0.2–0.4 MPa for butene-copolymer film grades, although the onset value depends on die geometry and melt temperature.
Compared with high-pressure LDPE of equivalent density, J1020FA20 exhibits lower long-chain branching, narrower shear-thinning behaviour, higher tensile strength, higher dart impact strength, and better environmental stress crack resistance, but lower melt elasticity, lower clarity, and higher tendency to sharkskin at high shear stress. Compared with an octene-based LLDPE of the same melt flow index and density, the butene comonomer yields fewer load-bearing tie molecules under film orientation, so dart impact and Elmendorf tear strength measured by ASTM D1709 and ASTM D1922 are typically lower, while optical properties remain in the same general range for externally antiblocked films. Compared with HDPE film grades, J1020FA20 has lower stiffness, lower yield strength, and lower temperature resistance, but much higher dart impact and elongation at break, which shifts its use toward flexible packaging rather than dimensionally stable sacks or liners requiring high top-load resistance.
The substitution of J1020FA20 for high-pressure LDPE in an existing film structure is not automatic. Screw torque, die pressure, melt temperature, bubble stability, and film optics can all shift. In practice, film converters often run this grade in a blend with 20–30 wt% LDPE because the branched component improves bubble stability and gloss while preserving most of the LLDPE-derived tensile and puncture benefits. When only J1020FA20 is used, the die temperature may need to be raised by 5–10 °C relative to an LDPE baseline, and the die gap may need to be widened by 0.2–0.4 mm to avoid melt fracture on high-output lines. These adjustments are equipment-specific; published data for this specific configuration is limited.
At film thickness below 25 µm, the dart impact and Elmendorf tear of butene-LLDPE J1020FA20 may decline steeply because there are fewer tie molecules per oriented volume to arrest crack propagation. If downgauging is required, a move to octene-based or metallocene LLDPE is usually more reliable. For agricultural film or outdoor liners, the base resin is not normally supplied with sufficient UV stabilisation; an external UV stabiliser masterbatch should be added according to the intended exposure classification under ISO 4892-2 or a regional equivalent. For high-cling stretch-wrap or heavy-duty silage film, published data for this specific configuration is limited, and the use of J1020FA20 should not be assumed without film-level oxygen transmission and tear validation under ASTM D882 and ASTM D1922.
For food-contact applications, regulatory clearance is assessed under the olefin polymer clause FDA 21 CFR 177.1520, not by the grade name alone. The finished article must still meet applicable migration limits for intended food types. In the European Union, Regulation (EU) 10/2011 may require overall migration testing depending on food simulant and temperature conditions. REACH compliance requires a supplier confirmation that any substance of very high concern is below 0.1 wt% in the article, and RoHS compliance requires analytical verification of restricted substance thresholds. The table below summarises the verification matrix applicable to film-grade polyethylene resins of this class.
| Standard / regulation | Focus | Typical verification route |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymer food contact | Supplier declaration and migration testing |
| Regulation (EU) 10/2011 | Plastic food-contact migration | Overall migration test report |
| REACH 1907/2006 | SVHC concentration 0.1 wt% | SDS Article 31/32 declaration |
| RoHS 2011/65/EU | Pb, Cd, Hg, Cr(VI), PBB, PBDE | Analytical report from supplier |
| ISO 1133-1:2022 / ASTM D1238-20 | Melt flow index | Certificate of analysis |
| ISO 1183-1:2019 / ASTM D1505 | Density | Certificate of analysis |
The grade designation does not fully define the additive formulation. The “FA” in J1020FA20 may indicate a film additive package, but the exact slip and antiblock levels should be confirmed from the supplier’s technical datasheet. If slip additives are present, the coefficient of friction measured on film conditioned for 40 h at 23 ± 2 °C and 50 ± 5% RH per ISO 291 can be lower than unmodified LLDPE, but the value depends on additive migration kinetics and corona treatment. Polyethylene is non-hygroscopic, so predrying is not normally required; however, if granules have been stored at relative humidity above 60% or exposed to condensation, superficial drying at 60–70 °C for 1–2 h is recommended to prevent surface defects. Avoid blending with amine-based additives or lubricants that may interfere with the slip package; published compatibility data for this specific grade is limited. Processing above 240 °C with extended residence time may generate gel specks and oxidised volatiles, so purging with HDPE or LDPE is recommended before shutdown and during grade transitions on long-run film lines.
