| HS Code | 933980 |
| Melt Flow Rate | 2.0 g/10 min (190°C, 2.16 kg) |
| Density | 0.920 g/cm³ |
| Tensile Strength At Yield | 12 MPa |
| Tensile Strength At Break | 25 MPa |
| Elongation At Break | 750% |
| Flexural Modulus | 280 MPa |
| Vicat Softening Point | 95°C |
| Melting Point | 122°C |
| Brittleness Temperature | -70°C |
| Environmental Stress Crack Resistance F50 | >1000 h |
| Haze | 8% |
| Gloss 45 | 55 |
As an accredited HANWHA LLDPE 4200D factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as pellets in 25 kg polyethylene bags, palletized and stretch-wrapped to ensure safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL loaded with HANWHA LLDPE 4200D resin, packed in 25kg bags on shrink-wrapped pallets, safely stowed for transit. |
| Shipping | HANWHA LLDPE 4200D is shipped as virgin thermoplastic resin in sealed moisture-proof bags, woven polypropylene sacks, or bulk containers. Transport via covered trucks, containers, or rail to avoid contamination and UV exposure. Keep dry, ventilated, and away from ignition sources during transit. Handle with standard industrial equipment to preserve product integrity and safety. |
| Storage | Store HANWHA LLDPE 4200D in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and strong oxidizers. Keep original packaging sealed to prevent moisture pickup and contamination. Avoid dusty conditions and static ignition sources. No special temperature control is required, but maintain moderate conditions. Use FIFO rotation to ensure optimal processing and performance within shelf life. |
| Shelf Life | Store in a cool, dry place away from direct sunlight. Shelf life is typically 12 months from manufacture. |
Conversion of HANWHA LLDPE 4200D into heavy-gauge industrial sacks normally begins with 100% virgin pellet feed or a 15 wt% high-pressure LDPE letdown blend on a 90 mm grooved-feed blown-film extruder with a 25:1 L/D barrier screw. Melt temperature at the die is held at 190–215 °C, the die gap is set at 1.8–2.2 mm, and the blow-up ratio is kept at 2.0–2.5 because the 0.40 g/10 min melt index (ASTM D1238, 190 °C/2.16 kg) increases shear heating in narrow-gap tooling and can trigger sharkskin melt fracture below 1.6 mm die gap. Frost line height is maintained at 600–900 mm for balanced machine-direction and transverse-direction orientation. For sacks of 100–180 µm thickness, a 500–1,000 ppm fluoropolymer processing aid is added when line output exceeds 200 kg/h to suppress die-lip deposit. The 0.920 g/cm³ nominal density (ASTM D1505) shifts filled-bag failure from HDPE-like brittle splitting to ductile elongation. Compliance anchoring uses ISO 21898 for safe working load, ASTM D638-14 for tensile yield and break, ASTM D1709-16a for dart impact, and ASTM D1922 for Elmendorf tear. When regrind exceeds 30 wt% or incoming fluff moisture exceeds 500 ppm, pre-drying at 70 °C for 2 h is required to avoid steam-related bubble instability and gel formation. EU exports require REACH Article 33 SVHC screening of the compounded formulation, and 2011/65/EU RoHS restrictions apply only to packaging for electrical/electronic goods, where the film must be free of restricted heavy metals. Terminal products include 50 kg mineral and resin sacks, construction debris sacks, and FIBC inner liners.
Agricultural silage and black mulch films based on HANWHA LLDPE 4200D are compounded at a typical formulation of 94.0 wt% resin, 3.0 wt% carbon black masterbatch (40% active carbon black), 2.0 wt% HALS UV masterbatch (10% active HALS), and 1.0 wt% process stabilizer masterbatch for black silage covers. The practical ceiling for UV masterbatch is 6 wt% total masterbatch in monolayer blown film; above this level, low-viscosity EVA carrier resins present in some UV masterbatches cause head pressure fluctuations of ±25 bar on an 80 mm, 30:1 L/D extruder, leading to bubble breathing and film thickness variation. Processing uses a die gap of 1.6–2.0 mm, melt temperature of 195–215 °C, blow-up ratio of 2.2–3.0, and film thickness of 60–120 µm. Long-term weathering is assessed by ISO 4892-2 cycle A1, environmental stress crack resistance by ASTM D1693-15, tensile by ASTM D638-14, and tear by ASTM D1922. The terminal products are clamp silage sheets, bunker covers, and black mulch film. A known service-life boundary is the use of pro-oxidant degradability additives above 0.5 wt%; this combination reduces thermo-oxidative life during extended summer exposure and is not recommended for multi-season agricultural film.
In freezer-grade lamination webs, a 30–50 µm blown LLDPE 4200D sealant layer is adhesive-laminated or extrusion-laminated to BOPET or BOPP printing plies. The sealant web is blown on a 70 mm extruder with a 24:1 L/D screw at 190–205 °C die temperature, die gap of 1.6–2.0 mm, and blow-up ratio of 2.0–2.5; it is then corona-treated to 38–42 dyn/cm for lamination adhesion (ASTM D2578). Gauge uniformity is controlled within ±5% on an automatic air ring because seal-force consistency below 90 µm depends more on thickness uniformity than on line speed. Heat-seal behavior is measured by ASTM F88/F88M; seal initiation is typically observed at 115–125 °C on a tray sealer, with plateau seal strength of 40–60 N/15 mm after a 0.5 s dwell. Food-contact compliance under 21 CFR 177.1520 applies to the olefin polymer base when the full additive package is cleared under the same section; EU 10/2011 requires an overall migration limit of 10 mg/dm² under food simulant D1 for frozen conditions. An operational boundary occurs when plant relative humidity exceeds 60%: corona-treated film must be laminated within 24 h to avoid surface energy decay below 36 dyn/cm. Terminal products include frozen vegetable pouches, ice cream bag-in-box liners, and seafood block bags.
| Requirement | Standard / method | Limit / condition |
|---|---|---|
| Olefin polymer clearance | 21 CFR 177.1520 | Base polymer and adjuvants cleared |
| Overall migration | EU 10/2011 Annex I | 10 mg/dm² |
| Seal strength | ASTM F88/F88M | 40–60 N/15 mm after 0.5 s at 115–125 °C |
| Wetting tension | ASTM D2578 | ≥38 dyn/cm |
Flat-die sheet extrusion of HANWHA LLDPE 4200D into geomembrane skins is limited to low-pressure hydraulic applications because the 0.920 g/cm³ density yields a secant modulus below HDPE geomembrane grades. The compound is run at 200–220 °C melt temperature on a 120 mm single-screw sheet extruder with a 30:1 L/D barrier screw and a 2.0–2.5 mm die gap, with 2.0–2.5 wt% carbon black masterbatch (40% active) for weathering stability. Sheet thickness of 0.75–1.25 mm is cooled on a polished roll stack; field seams are produced by wedge welding at 280–350 °C hot-air temperature. Seam peel is tested under ASTM D6392, sheet tensile under ASTM D6693, environmental stress crack resistance under ASTM D1693, and puncture under ASTM D4833. The material is not a direct substitute for GRI-GM13 HDPE in primary hazardous-waste landfill liners; it is used in canal lining, secondary containment around fuel storage, and floating covers. Published data for wedge-welded 4200D seam performance in low-temperature installations is limited; seam trials are required before specification. Adding 5–10 wt% high-pressure LDPE improves edge melt strength during haul-off but can reduce the ESCR plateau.
Pallet unitization hoods blown on high-stalk towers commonly use HANWHA LLDPE 4200D as the high-strength component in a 70/30 wt% dry blend with a metallocene-catalyzed LLDPE having a melt index of 0.5–1.0 g/10 min. The blend is extruded through a 350 mm die on a 120 mm grooved-feed extruder at 195–215 °C, die gap of 1.4–1.8 mm, blow-up ratio of 3.5–4.5, and frost line height of 1,200–1,500 mm, producing hood film at 60–90 µm. The high stalk and elevated blow-up ratio orient the film; machine-direction and transverse-direction tensile balance is checked under ASTM D882-18, puncture under ASTM D5748, and elastic recovery under ASTM D5459. A specific warehouse boundary is sustained-load creep at 40 °C exceeding 36 h; pallets stored outdoors are converted with 90 µm film rather than 60 µm to reduce creep deformation. Terminal products are stretch hood films for pallets of ceramic tile, cement board, and chemical drums.
Coextruded five-layer blown film used for detergent and chemical sachets incorporates HANWHA LLDPE 4200D in the outer and bulk layers, reducing environmental stress crack formation versus HDPE-rich cores. A typical layer distribution is 20 wt% outer LLDPE 4200D skin, 25 wt% LLDPE 4200D bulk with regrind, 10 wt% anhydride-modified tie resin, 10 wt% EVOH barrier, and 35 wt% inner LLDPE 4200D skin/bulk. The five-layer line uses 35/45/35 mm satellite extruders around an 80 mm main extruder, with barrier melt temperature held at 225–230 °C and LLDPE layers at 195–210 °C to prevent EVOH degradation at the die. Die gap is 1.8–2.2 mm, blow-up ratio is 2.0–2.5, and film thickness is 80–120 µm. Compliance for chemical packaging is supported by UN 6.1/8/9 drop and stacking tests once converted into bags, while food-grade versions require EU 10/2011 and 21 CFR 177.1520. Terminal products are stand-up pouch films, chemical sachet laminates, and heavy-duty barrier liners. The main processing failure is interfacial instability when the EVOH layer drops below 8 wt%; a minimum EVOH layer thickness of 8 µm is retained to avoid flow channeling.
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Hanwha LLDPE 4200D is a butene-based linear low-density polyethylene resin designed for blown film extrusion. The grade is specified by a nominal density of 0.920 g/cm³ under ASTM D1505 and a melt index of 0.55 g/10 min at 190°C/2.16 kg under ASTM D1238. The molecular architecture is a linear ethylene backbone with short-chain branches introduced through butene comonomer, giving a broader crystallization distribution than high-pressure LDPE and shorter branch length than hexene-based LLDPE. The product is used in heavy-duty sacks, agricultural silage film, industrial liners, lamination webs, and frozen-food packaging where down-gauging and puncture resistance are specified. The grade differs from C4-LLDPE variants with higher melt indices, from C6-LLDPE grades with longer comonomer branches, and from metallocene LLDPE grades with a narrower molecular weight distribution. The D suffix is manufacturer-specific and does not by itself indicate the additive package; the slip, antiblock, and processing aid levels must be confirmed against the supplier certificate of analysis.
The tabulated film values represent the typical class range for this density and melt-flow position; lot-specific values from the Hanwha certificate of analysis supersede them.
| Parameter | Test method | Typical value or range |
|---|---|---|
| Nominal density | ASTM D1505 | 0.920 g/cm³ |
| Melt index | ASTM D1238 | 0.55 g/10 min |
| Tensile yield strength, machine direction | ASTM D882 | 10–12 MPa |
| Elongation at break, machine direction | ASTM D882 | 600–800% |
| Elmendorf tear, machine direction | ASTM D1922 | 300–500 gf |
| Dart impact F50 | ASTM D1709 Method A | 800–1000 g |
| Haze | ASTM D1003 | 8–15% |
| Seal initiation temperature | ASTM F1921 | 100–115°C |
On a blown-film extrusion line equipped with a 50 mm single-screw extruder with 30:1 L/D barrier screw and 100 mm annular die, the barrel temperature profile from feed to metering is typically set at 160°C, 180°C, 195°C, and 210°C. Adapter and die temperatures are maintained at 210°C and 205°C. Melt pressure before the screen changer generally ranges from 250 bar to 350 bar at output rates of 60–100 kg/h. At die gaps of 1.2–2.5 mm and blow-up ratios of 2.0:1–3.0:1, bubble stability remains acceptable. The onset of sharkskin melt fracture appears when the die gap is reduced below 1.2 mm at high screw speed. Raising die temperature by 5–10°C or reducing output shifts the critical shear rate back into the stable region. This behavior is consistent with the higher melt viscosity of a 0.55 g/10 min C4-LLDPE relative to LDPE film grades.
The butene comonomer introduces ethyl branches after incorporation. At a density of 0.920 g/cm³, the comonomer disrupts crystallinity, decreases lamellar thickness, and increases the amorphous tie-chain population relative to HDPE homopolymer. However, the ethyl branch is shorter than the butyl branch generated by hexene, so the probability of tie-chain formation is lower than in C6-LLDPE of equivalent density. The practical result is that LLDPE 4200D provides sufficient dart impact for heavy-duty sacks but can exhibit lower Elmendorf tear propagation than hexene grades. When film is down-gauged below 50 µm, dart impact should be checked under ASTM D1709 Method A and tear resistance under ASTM D1922. Published data for this specific grade at thicknesses below 25 µm is limited; class-level C4-LLDPE data show a non-linear loss of dart impact below 30 µm unless processing conditions are adjusted to preserve orientation balance.
Differential scanning calorimetry for this density class shows a peak melting temperature of 122–124°C under ASTM D3418, with a lower-melting shoulder near 105°C from the comonomer-rich fractions. The broad endotherm assists early seal initiation but reduces hot-tack strength relative to metallocene grades with uniform comonomer distribution. This trade-off affects high-speed vertical form-fill-seal operations where hot-tack strength is measured within milliseconds of seal-bar opening.
The principal differentiator between LLDPE 4200D and a C6-LLDPE of the same density and melt index is comonomer length. Hexene-based resins have longer short-chain branches and greater tie-chain density, which raises dart impact and tear resistance at equivalent crystallinity. In heavy-duty sack applications, replacement of a C6-LLDPE with C4-LLDPE 4200D may require a gauge increase of 5–10% to meet the same impact specification, depending on sack construction and filling environment. Compared with a metallocene LLDPE of similar density, LLDPE 4200D has a broader molecular weight distribution, lower melt pressure at extrusion shear rates, and more stable bubble formation on conventional blown-film dies. Metallocene grades tend to show higher dart impact at low gauge and lower seal initiation temperature, but they can produce melt-pressure fluctuations and reduced output on older extrusion equipment. Published comparative data for this specific Hanwha grade against all metallocene variants is limited; converter trials should compare melt pressure, amperage, and dart impact on the target line.
Blending with high-pressure LDPE at 10–20 wt% is used on some lines to improve bubble stability when no internal bubble cooling is available. The addition reduces sharkskin melt fracture but lowers dart impact and increases haze. A blend of LLDPE 4200D with 20 wt% LDPE is a practical compromise for thin lamination film where bubble stability is more critical than optical clarity; the exact ratio must be optimized with the downstream sealing profile and converter gauge specifications.
Frozen-food packaging lines running high-pressure LDPE at 0.921 g/cm³ density and 0.25 g/10 min melt index often shift to LLDPE 4200D when puncture resistance and down-gauging are specified. The linear short-chain branching in LLDPE 4200D provides higher tensile strength and elongation at break than high-pressure LDPE at equivalent gauge, but the reduced long-chain branching content lowers shear thinning and can increase extruder amperage. In practice, melt temperature is raised by 10–20°C relative to high-pressure LDPE to reduce viscosity. The die gap is typically widened from 0.8 mm to 1.5 mm because LLDPE is more prone to melt fracture through narrow die gaps. The resulting film may show lower clarity and higher haze than LDPE, but puncture strength and low-temperature seal integrity are improved. Low-temperature brittleness should be validated by ASTM D746, while the final laminate structure must be tested under the intended storage temperature because sealant toughness depends on layer distribution and tie-layer choice.
In agricultural silage film, LLDPE 4200D is used as a puncture-resistant layer rather than as the external weathering layer. The base resin does not contain the UV stabilizer package required for extended outdoor exposure. A separate UV masterbatch or stabilizer concentrate must be added before film production. Published data for this specific grade in prolonged silage acid contact is limited; converters should verify retention of tensile elongation after chemical exposure under ASTM D882.
Melt fracture in LLDPE 4200D is shear-induced and is observed more readily than in high-pressure LDPE because of the linear structure and higher molecular weight tail. The critical shear rate for sharkskin is lower than for LDPE, which is why die gaps below 1.2 mm are generally avoided. When melt fracture appears, increasing the die temperature by 5–10°C, widening the die gap, or reducing output is preferred over increasing screw speed. External die-lip heaters and internal bubble cooling can expand the stable operating window on lines where output is the bottleneck.
Gel formation is an operational boundary. Avoid melt temperatures above 230°C for extended residence time because oxidative gel formation increases. The resin is not hygroscopic, and pre-drying is generally unnecessary unless surface condensation from storage below dew point is observed. If surface moisture is visible, drying at 70–80°C for 3–4 h in a desiccant dryer is sufficient. Storage below 60% relative humidity and below 40°C is recommended to prevent additive migration and caking of pellets.
Edge trim of LLDPE 4200D can be re-extruded up to 20 wt% without significant loss of dart impact if the trim is dry and uncontaminated. Higher recycle fractions reduce bubble stability and can shift the seal initiation temperature upward because of repeated thermal history. At shutdown, purging with a lower-melt-index LDPE or HDPE displaces molten LLDPE from the die and reduces gel accumulation. Avoid combining LLDPE 4200D with amine-based additives or high-pH lubricants in long hold-up zones; such additives can interact with residual catalyst residues and produce organoleptic defects in food-contact film.
Food-contact compliance for the final film is generally evaluated under FDA 21 CFR 177.1520 for olefin polymers and European food-contact migration limits under EU Regulation No 10/2011. The resin should not be assumed automatically compliant for all food types; specific migration testing must be performed on the final film because processing aids and inks affect overall migration. REACH SVHC and RoHS heavy-metal restrictions are typically addressed through supplier declarations; a certificate of compliance should be obtained before export.
