| HS Code | 454345 |
| Density | 0.950 g/cm³ |
| Melt Index 190 C 2 16 Kg | 0.05 g/10 min |
| Melting Point | 131 °C |
| Vicat Softening Point | 124 °C |
| Tensile Strength At Yield | 27 MPa |
| Tensile Strength At Break | 50 MPa |
| Elongation At Break | 600 % |
| Flexural Modulus | 1200 MPa |
| Elmendorf Tear Strength Md | 20 g |
| Elmendorf Tear Strength Td | 200 g |
| Dart Drop Impact | 200 g |
| Haze | 10 % |
| Gloss | 10 % |
| Water Absorption | <0.01 % |
| Dielectric Constant | 2.3 |
| Volume Resistivity | >1E15 ohm·cm |
As an accredited Braskem HDPE HDF1050 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Braskem HDPE HDF1050 packaging: 25 kg polyethylene-lined paper bags, palletized, with optional 1,000 kg octabins for bulk shipment. |
| Container Loading (20′ FCL) | Braskem HDPE HDF1050 loaded into a 20′ FCL container as palletized 25 kg bags, stretch-wrapped and secured for ocean shipment. |
| Shipping | Braskem HDPE HDF1050 is shipped as solid polyethylene pellets in 25 kg bags, bulk bags, or bulk truck/rail containers. Packaging must remain sealed to prevent moisture and contamination. Store in dry, clean conditions away from heat and sunlight. Handle per SDS; no special hazardous transport classification. |
| Storage | Store Braskem HDPE HDF1050 indoors in a cool, dry, well-ventilated area, away from direct sunlight, heat, sparks, and open flames. Keep material in original sealed bags or containers on pallets, protecting it from moisture, dust, and contamination. Avoid prolonged UV exposure, excessive stacking, and incompatible substances. Maintain good housekeeping. Follow supplier SDS, local regulations, and recommended temperature limits. |
| Shelf Life | Braskem HDPE HDF1050 shelf life: 24 months in original unopened packaging, stored cool, dry, ventilated, away from direct sunlight. |
In high-output monolayer blown-film converting aimed at 12.5 µm to 25.4 µm grocery sacks, HDF1050 with nominal density 0.950 g/cm³ and melt flow index 0.05 g/10 min at 190 °C/2.16 kg under ASTM D1238 imposes a high-stalk bubble geometry rather than a short-stalk configuration. The processing window on single-screw extruders with an L/D 24:1 to 30:1 barrier screw, screen pack, and die diameter 250 mm to 350 mm is bounded at the lower end by melt fracture and at the upper end by oxidative gel formation; in continuous runs the practical melt temperature band around 210 °C to 225 °C is often held to a ±5 °C set point drift because HMW-HDPE film grades of this class lose bubble stability when barrel temperature oscillation increases. The die gap is set at 1.0 mm to 1.5 mm, the blow-up ratio is kept between 3.0:1 and 4.0:1, and the frost line height is maintained at 8 to 10 die diameters; in this geometry the frost line can be raised to lower transverse-direction gauge spread, but at the cost of reduced dart drop. Addition levels for a monolayer structure are 96.5 wt% to 98.0 wt% HDF1050, 2.0 wt% to 3.5 wt% white masterbatch, and 0.02 wt% to 0.05 wt% fluoropolymer processing aid masterbatch; the processing aid suppresses die-lip buildup on long runs, but addition above 0.05 wt% can lower surface energy sufficiently to interfere with downstream water-based flexographic ink adhesion unless inline corona treatment exceeds 38 mN/m. Compliance for this application is anchored to FDA 21 CFR 177.1520 for direct food contact with bakery, produce, and dry goods, EU Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm² for food-contact plastics, and ASTM D4976 for the base polyethylene material specification. Mechanical validation on the converting floor uses ASTM D882 thin-sheet tensile testing, ASTM D1922 Elmendorf tear, and ASTM D1709 dart impact; a 12.5 µm film run at high-stalk geometry typically exhibits directional property differences with machine-direction tear lower than transverse-direction tear, so bag perforation positions are offset to avoid tear propagation across the gusset. Terminal products include T-shirt sacks, produce roll bags, bakery bags, and light bin liners. The operational boundary is that HDF1050 is not suitable as a sealant-only monolayer on high-speed rotary bag machines that require seal initiation below 130 °C; it is used as an outer strength layer or converted on side-weld bag machines with hot-bar dwell times of 0.4 s to 0.8 s at 155 °C to 170 °C for monolayer film.
In five-layer blown-film structures for dry food liners, HDF1050 is placed in the two outer skins to supply stiffness, crease resistance, and downgauging potential, while the core is EVOH and the adjacent layers are maleic anhydride-grafted tie resins. The total HDF1050 addition across the two skins ranges from 45 wt% to 55 wt% of the film mass, the tie layers together are 8 wt% to 12 wt%, EVOH is 5 wt% to 8 wt%, and a metallocene LLDPE or LDPE sealant skin is 20 wt% to 30 wt%. The production process is a five-layer blown-film line with separate extruders feeding a spiral mandrel die; HDF1050 skin extruders are run at 215 °C to 232 °C, EVOH at 190 °C to 205 °C, and the tie resin at 195 °C to 215 °C to avoid interfacial viscosity inversion. If the HDF1050 skin extruder set point exceeds 230 °C while EVOH remains below 205 °C, the coextrusion interface can develop shark-skin-type instabilities in the barrier layer, especially at line speeds above 80 m/min. Die gap is maintained at 1.2 mm to 1.8 mm, blow-up ratio at 2.5:1 to 3.5:1, and total film thickness at 35 µm to 60 µm. Compliance includes FDA 21 CFR 177.1520 for the olefin skins, FDA 21 CFR 177.1360 for the EVOH barrier layer, and EU Regulation (EU) No 10/2011 with total migration below 10 mg/dm²; oxygen transmission is measured by ASTM D3985 and water vapor transmission by ASTM F1249. Terminal finished products are cereal box liners, cracker sleeves, dry soup pouches, and powdered drink film bags. The operational limitation is that HDF1050 should not replace the sealant layer in this structure because seal initiation temperature is higher than that of LLDPE and seal strength plateau narrows at 135 °C to 150 °C; processors that force HDF1050 into the sealant layer commonly observe weld-line thinning at the bag side seam when package drop weight exceeds 2 kg.
| Application segment | Compliance anchor | Critical test method | Typical control limit |
|---|---|---|---|
| Monolayer grocery sack film | FDA 21 CFR 177.1520, EU 10/2011, ASTM D4976 | ASTM D882, ASTM D1922, ASTM D1709 | Dart impact retained above 180 g at 12.5 µm |
| Coextruded barrier food liner | FDA 21 CFR 177.1520, 21 CFR 177.1360, EU 10/2011 | ASTM D3985, ASTM F1249, ASTM F88 | Oxygen transmission below 0.5 cm³/m²/day/atm at 23 °C/0% RH |
| Industrial liner and construction sheeting | ASTM D4397, REACH (EC) 1907/2006 | ASTM D882, ASTM D1922, ASTM D1709 | Thickness variation below ±8% at 100 µm |
| Vertical form-fill-seal frozen food film | FDA 21 CFR 177.1520, EU 10/2011 | ASTM F88, ASTM D1894, ASTM D882 | Seal strength above 12 N/15 mm at 23 °C |
| Agricultural silage cover film | ASTM D4397, REACH (EC) 1907/2006, RoHS Directive 2011/65/EU | ASTM D1709, ASTM D882, ASTM D1922 | Carbon black masterbatch at 2.0 wt% to 3.0 wt% |
At film thickness between 75 µm and 150 µm, industrial liner converting shifts from dart-impact-dominated packaging film behavior to tear propagation resistance, weld seam integrity, and gauge uniformity. The addition profile for this segment is 85 wt% to 100 wt% HDF1050, with 2.0 wt% to 3.0 wt% carbon black masterbatch for black UV-stabilized sheeting and up to 15 wt% clean in-house edge-trim regrind. Published data for the specific regrind fraction with HDF1050 is limited, so each regrind lot is qualified for ASTM D1709 dart impact retention and ASTM D882 elongation at break before line usage. Production is performed on monolayer blown-film lines with die diameter 350 mm to 500 mm, die gap 1.4 mm to 2.0 mm, blow-up ratio 2.5:1 to 3.0:1, and melt temperature 215 °C to 235 °C. At thickness above 100 µm, the primary process conflict is between output rate and bubble cooling; insufficient air ring cooling produces a low frost line and high machine-direction tear, while excessive cooling can induce gauge bands at ±8% variation. The lower blow-up ratio reduces transverse-direction extensibility but stabilizes the heavier bubble and improves edge-trim regrind compatibility. Compliance is anchored to ASTM D4397 for polyethylene sheeting used in construction, industrial, and agricultural applications, with ASTM D882 tensile, ASTM D1922 Elmendorf tear, ASTM D1709 dart impact, and ASTM D1894 coefficient of friction forming the release test set. Terminal products include construction vapor retarders, under-slab vapor barriers, crawl space liners, temporary containment sheeting, equipment covers, pallet covers, and heavy box liners. The operational boundary is that carbon black stabilized film exposed to direct sunlight can reach surface temperatures above 60 °C, and welded seams in black film that are formed above 160 °C may show shrinkage-induced creases; seam temperatures above 170 °C are generally avoided to reduce oxidation at the weld edge in thicknesses above 125 µm.
Vertical form-fill-seal packaging for IQF vegetables, frozen fruit, and dry pasta uses HDF1050 as the outer strength layer in a three-layer A/B/A construction or as a stiff monolayer film with slip and antiblock packages. In a three-layer structure, the addition profile is 70 wt% to 80 wt% HDF1050, 15 wt% to 25 wt% LLDPE or LDPE sealant resin, and 0.3 wt% to 0.6 wt% combined slip and antiblock masterbatch; in monolayer constructions, HDF1050 is run at 95 wt% to 98 wt% with the balance being processing aid and slip/antiblock additives. The film is produced on blown-film equipment at 30 µm to 60 µm, with die gap 1.2 mm to 1.6 mm, blow-up ratio 2.8:1 to 3.5:1, and melt temperature 210 °C to 225 °C. On the VFFS line, side-seal jaws operate at 150 °C to 175 °C, dwell time 0.3 s to 0.8 s, and jaw pressure 2 bar to 3 bar; film slip is adjusted to a coefficient of friction between 0.2 and 0.4 under ASTM D1894 to prevent film drag during draw-down rolls. Frozen product dust and ice crystals are a primary sealing contamination source, so air-jet cleaning of the seal jaws is required at packaging speeds above 60 bags/min. Compliance for direct frozen food contact is based on FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011, with overall migration below 10 mg/dm². Seal strength is measured by ASTM F88; published HDF1050-specific frozen-temperature seal data is limited, so processors should qualify seal strength at -20 °C rather than at ambient only, because HDPE sealant layers exhibit a measurable seal strength decline at frozen storage temperature compared with LLDPE sealant layers. Terminal finished products are IQF vegetable pouches, frozen fruit pouches, frozen side dish bags, and dry pasta short-run bags. The operational limitation is that HDF1050 in a monolayer sealant role requires higher seal temperatures and longer dwell than LLDPE; if the sealant layer is thinned below 15% of total film thickness in the three-layer structure, VFFS seal failure under product drop becomes statistically visible at bag weights above 1.5 kg.
In agricultural silage cover and bunker film, HDF1050 is run as the outer stiffness layer in a three-layer A/B/A construction where the inner layer is LLDPE for sealability and puncture resistance. The addition profile is 55 wt% to 70 wt% HDF1050, 20 wt% to 30 wt% LLDPE, 10 wt% to 20 wt% clean in-house regrind, and 2.0 wt% to 3.0 wt% carbon black masterbatch. Because published data for the specific HDF1050 regrind fraction in silage cover film is limited, each regrind lot is evaluated for ASTM D1709 dart impact, ASTM D882 elongation at break, and ASTM D1922 tear resistance before line use. The production process is a three-layer blown-film line with die diameter 400 mm to 600 mm, die gap 1.6 mm to 2.0 mm, blow-up ratio 2.8:1 to 3.5:1, melt temperature 210 °C to 225 °C, and total film thickness 100 µm to 200 µm. The process conflict is that regrind addition reduces melt strength and can destabilize the high-stalk bubble at levels above 20 wt%; increasing regrind also shortens the melt filter screen life, so screen-pack differential pressure is monitored to avoid melt starvation. Compliance is anchored to ASTM D4397 for agricultural polyethylene sheeting, REACH (EC) 1907/2006 for substances of very high concern, and RoHS Directive 2011/65/EU for heavy metals in pigment packages. Terminal finished products are silage bags, bunker covers, silage pit liners, and agricultural fumigation covers. The operational boundary is that carbon black loaded film absorbs solar radiation and surface temperatures can exceed 60 °C, so seam creep resistance at elevated temperature requires a separate weld-strength check per ASTM F88 before field deployment.
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Braskem HDPE HDF1050 is a high-density polyethylene resin supplied as a high-molecular-weight blown film grade. The product is delivered in pellet form and is intended for non-stretched film structures in which stiffness, moisture resistance, and melt strength are primary processing and performance requirements. The nominal density is 0.950 g/cm³ when measured under ASTM D1505 or ISO 1183-1:2019, and the high-load melt index is 10 g/10 min at 190 °C and 21.6 kg load under ASTM D1238-20 or ISO 1133-1:2022. The low-load melt index at 190 °C and 2.16 kg is generally quoted below 0.15 g/10 min, which gives a high-load/low-load flow-rate ratio above 66:1. That ratio places HDF1050 in the high-molecular-weight HDPE film segment and distinguishes it from injection-moulding or blow-moulding grades with low-load melt index above 1 g/10 min.
The resin is used principally in high-stalk and long-stalk blown film lines where bubble stability at high blow-up ratios is required. Because the high-load melt index of 10 g/10 min reflects a comparatively high-molecular-weight distribution, the melt exhibits elevated shear viscosity during die-lip deformation and slower molecular relaxation after draw-down. The result is a useful combination of melt strength and web stability in thin films, but also a measurable increase in extruder torque and die pressure relative to lower-molecular-weight HDPE film grades. Published data for this specific resin in a fixed production configuration is limited to the supplier’s lot-specific certificate of analysis; the values should be verified against the current Braskem technical datasheet before a permanent process specification is written.
Heat aging, antioxidant package, and additive composition may shift from lot to lot within the product specification limits. Converters producing food-contact packaging must not rely on generic polyethylene approvals alone and should obtain the supplier’s statement of composition for the exact lot. HDF1050 is not predried under normal ambient conditions because high-density polyethylene is hydrophobic, but condensation on cold pellets stored above 60% RH can introduce surface moisture and should be controlled by dry-air hopper conditioning or by allowing the pellet to reach ambient temperature before extrusion.
In comparison to a conventional HDPE film grade with high-load melt index in the 20–30 g/10 min range, HDF1050 produces a stronger melt web and permits higher bubble stability at a given film thickness. The high-load melt index of 10 g/10 min indicates that the resin will generally generate higher head pressure and higher motor load on the same extruder, particularly when the die gap is held constant. This is an operational boundary, not a defect: the increased melt strength allows a converter to reduce film thickness while retaining the bubble geometry needed for consistent layflat dimensions. However, the maximum screw speed before the melt temperature exceeds 230 °C is usually lower than that of a resin with high-load melt index above 20 g/10 min. The exact speed differential depends on barrel L/D ratio, screw design, backpressure, and cooling efficiency.
The density of 0.950 g/cm³ also differentiates HDF1050 from HDPE film grades with density of 0.944 g/cm³ or lower. At equal thickness, the higher-density film exhibits a higher secant modulus and a lower moisture-vapour transmission rate. The stiffness gain is useful for down-gauged T-shirt sacks, bin liners, and packaging films where load-bearing performance is controlled by film rigidity rather than by impact toughness. The trade-off is that the higher-density crystalline structure tends to produce lower dart impact and lower Elmendorf tear resistance than a lower-density high-density polyethylene film of the same thickness. The differences become more pronounced at low temperatures because the higher density reduces the energy absorbed before fracture.
A converter replacing a linear low-density polyethylene grade with density of 0.918 g/cm³ should expect a very large increase in stiffness and a similarly large decrease in puncture and low-temperature impact resistance. The substitution is therefore appropriate only where the end-use requirement prioritises stiffness, moisture resistance, or the film’s dead-fold character over high elongation and dart impact. If down-gauging is attempted, the thickness reduction must be validated with the same barrier and mechanical tests used for the original film, including ASTM D882, ASTM D1709, and ASTM F1249 where applicable.
For blown film production from HDF1050, the resin’s high molecular weight means that purging between HDF1050 and lower-viscosity LLDPE or metallocene grades requires a dedicated HDPE purge compound or a commercial purging agent. A direct viscosity mismatch can leave melt lines, gels, and polymer residues in spiral mandrel dies for several hours after the transition. Converters should monitor die pressure and break-plate pressure during the transition to detect incomplete purging before film deviation becomes visible.
The first process conflict on high-stalk blown film lines is the interaction between frost line height and bubble stability. For HDF1050, a frost line height of 8–12 die diameters is typically used to allow sufficient molecular orientation while preventing excessive bubble flutter. A frost line that is too short tends to produce blocking and high film-to-film friction, because the inner and outer surfaces are flattened before the microstructure has stabilised. A frost line that is too high can increase gauge variation and make the bubble sensitive to air drafts and die-lip temperature changes. The correct position is specific to the die diameter, blow-up ratio, and output rate, so it should be established by scanning the layflat profile rather than by copying a setpoint from another grade.
The second conflict is the relationship between output and melt temperature. High-molecular-weight HDPE grades such as HDF1050 rely on shear heating to reach a stable melt condition, but excessive shear heating at high screw speed can push the melt into the oxidative degradation range. Melt temperatures between 200 °C and 230 °C are typical for this resin on single-screw extruders with L/D ratios of 24:1 to 30:1. Above 230 °C, bubble stability may decrease because the melt strength falls, and above 250 °C the degradation by-products can create gels, off-odour, and colour shifts in the film. The melt temperature should be measured at the adaptor or die entrance with an immersion thermocouple rather than inferred from barrel-zone setpoints.
The third conflict is die pressure. On a 90 mm spiral-mandrel die with a die gap of 2.0 mm, die pressure in the range of 300–450 bar may be observed during stable operation. Actual values depend on die geometry, internal bubble cooling, output rate, and melt temperature, and published data for this specific configuration is limited. The pressure limit of the extruder drive and the screen pack must be checked before increasing screw speed. High die pressure also increases backpressure on the screw, which can reduce pumping stability if the feed section is not cooled properly. A barrier screw with a Maddock or spiral mixing section is preferable because it can tolerate the high backpressure without excessive pressure variation at the die lip.
Blow-up ratios from 3:1 to 5:1 are generally employed for HDF1050. At low blow-up ratios below 2.5:1, the film may show unbalanced tear resistance, with high machine-direction tear and low transverse-direction tear. At high blow-up ratios above 5:1, the bubble becomes more difficult to control unless internal bubble cooling and stable air rings are available. The die gap is typically set from 1.8 mm to 2.5 mm for HDPE film. A die gap that is too narrow can raise die pressure and reduce film impact strength, while a die gap that is too wide can lower draw-down and reduce machine-direction orientation.
When HDF1050 is run in monolayer film, gauge profiles should be checked against the dart impact and Elmendorf tear results. The high density of 0.950 g/cm³ means that the resin is more sensitive to gauge variation in low-temperature impact applications than a lower-density high-density polyethylene. A thickness deviation of ±2 µm in a 15 µm film may create a low-impact defect path, so the die, air ring, and collapsing-frame alignment need to be maintained within the equipment manufacturer’s tolerances.
In multilayer coextrusion, HDF1050 is typically used as a stiff core layer or as a surface layer to increase film modulus. The resin’s melt viscosity should be matched with the adjacent layers to avoid interfacial instability. If the adjacent layer has a high-load melt index above 20 g/10 min, the viscosity ratio can produce layer-thickness variation and wavy interfaces. The converter can adjust the melt temperature or blend a small amount of a compatible melt-flow modifier only when the supplier has verified the additive package. Uncontrolled blending with a low-viscosity polyolefin wax can reduce bubble stability and tensile properties. The use of a high-backpressure die with symmetrical flow channels reduces the risk of layer encapsulation and interfacial distortion.
Film produced from HDF1050 is commonly evaluated by tensile testing under ASTM D882, dart impact under ASTM D1709 Method A or Method B, Elmendorf tear under ASTM D1922, and moisture-vapour transmission under ASTM F1249. The high-density structure yields a higher modulus and a lower water-vapour transmission rate than lower-density polyethylene grades at equivalent thickness, but the same density increase reduces dart impact and low-temperature puncture resistance. These performance boundaries are not unique to HDF1050; they apply to the high-density polyethylene family and become more severe as density approaches 0.950 g/cm³ or higher.
For food-contact packaging, high-density polyethylene homopolymers and copolymers may be covered by 21 CFR 177.1520 when the finished article meets the prescribed extractive limits. The converter is responsible for confirming that the supplied grade, including its antioxidant and processing stabiliser package, is appropriate for the intended food-contact application. Compliance with EU Regulation 10/2011 as amended must be demonstrated by the final converter through migration testing or conservative compliance modelling, because the additive package and film thickness can affect the result. HDF1050 may also be assessed against REACH and RoHS Directive 2011/65/EU requirements when the finished film is placed on the market, but the supplier’s regulatory statement should be obtained for the specific lot and region.
The resin should not be used for injection-moulding, rotational moulding, or extrusion blow-moulding operations where low shear viscosity and high melt flow under low load are required. High shear rates above 1,000 s⁻¹ in injection runners can produce melt fracture and surface flow marks because the high-molecular-weight resin does not relax quickly enough during filling. HDF1050 is also not designed for stretched film structures requiring low density and high puncture toughness. Combining HDF1050 with amine-based additives should be avoided unless thermal-oxidative stability has been verified, because amine-based species may interfere with the phenolic antioxidant package at elevated processing temperatures. Oxidative stability can be screened under ASTM D3895 by measuring oxidation induction time.
Storage should be in a dry, clean environment with ambient temperature below 40 °C and relative humidity below 60%. If the resin is exposed to moisture condensation, it should be dried with dry air at 70–80 °C for 1–2 h before extrusion. Prolonged storage near heat sources or under ultraviolet light should be avoided because the stabiliser package can be consumed prematurely. When regrind is added, the maximum addition should be based on the converter’s process validation, but high levels of recycled material can increase gel counts and reduce bubble stability in high-stalk HDPE film lines.
