DSM HDPE HB50
- Product Name: DSM HDPE HB50
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- DSM HDPE HB50 is typically used in formulations when melt flow index and density and processing temperature and pressure must be controlled within specific ranges.
| HS Code | 957203 |
| Density | 0.950 g/cm³ |
| Melt Flow Rate | 0.35 g/10 min |
| Tensile Strength At Yield | 25 MPa |
| Tensile Modulus | 1100 MPa |
| Elongation At Break | >600 % |
| Charpy Notched Impact Strength | 12 kJ/m² |
| Vicat Softening Temperature | 125 °C |
| Heat Deflection Temperature | 75 °C |
| Melting Point | 130 °C |
| Water Absorption | 0.01 % |
| Hardness Shore D | 60 |
| Volume Resistivity | >10^15 ohm·cm |
| Dielectric Constant | 2.3 |
| Thermal Conductivity | 0.4 W/m·K |
| Coefficient Of Linear Thermal Expansion | 1.2E-4 /°C |
| Brittleness Temperature | -70 °C |
| Stress Cracking Resistance | >1000 h |
As an accredited DSM HDPE HB50 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | DSM HDPE HB50 is packed in 25 kg multiwall paper bags, palletized at 40 bags per 1,000 kg pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): DSM HDPE HB50 in 25 kg bags, palletized, shrink-wrapped; approximately 18–20 MT per 20′ FCL. |
| Shipping | DSM HDPE HB50 is shipped as non-hazardous thermoplastic pellets in 25 kg polyethylene bags or 1000 kg jumbo bags, palletized and stretch-wrapped. Transport in clean, dry, covered trucks/containers at ambient temperature. Protect from moisture, contaminants, UV, and excessive heat; avoid spills due to slipping hazard. Not classified as dangerous goods. |
| Storage | Store DSM HDPE HB50 in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and strong oxidizing agents. Keep in tightly closed, labeled original containers or suitable bags, palletized off the floor. Avoid moisture, contamination, and excessive stacking. Maintain good housekeeping to prevent pellet spills and slipping hazards. Follow local regulations and SDS recommendations. Use first-in, first-out stock rotation. |
| Shelf Life | Shelf life for DSM HDPE HB50 is indefinite when stored cool, dry, well-ventilated, and away from direct sunlight. |
Extrusion blow moulding plants processing DSM HDPE HB50 for industrial chemical containers specify the grade for its high-molecular-weight distribution and melt strength; the grade designation indicates a nominal melt flow rate of 0.50 g/10 min when measured at 190 °C under 2.16 kg (ISO 1133-1:2022), and density is commonly reported in the range of 0.948–0.952 g/cm³ (ISO 1183-1:2019). On accumulator-head machines with parison lengths exceeding 800 mm, die swell in the range of 35 % to 55 % and gravitational sag require parison programming to prevent sidewall thinning at the lower pinch-off zone. Design-type certification for Packing Group II dangerous goods containers follows UN Model Regulations Chapter 6.1 and ADR 6.1.3; a 30 L jerry can must survive a drop impact from 1.2 m at -18 °C, stack load equivalent to 3.0 m for 28 days, and hydrostatic internal pressure of 100 kPa for 30 min. For marine transport, IMDG 6.1.3 imposes the same design-type test sequence, while EU 94/62/EC and REACH Article 33 govern packaging waste control and substance declaration obligations.
The production formulation is anchored at 100 phr DSM HDPE HB50. Carbon black masterbatch is metered at 0.5–2.0 wt%; the lower range is used for closed-loop plant runs, and the upper range is reserved for containers stored outdoors in high-solar-radiation locations. A processing stabilizer package is dosed at 0.02–0.08 wt%, and a HALS-based UV masterbatch may be added at 0.1–0.4 wt% where carbon black alone does not meet the required UV index. Regrind from post-trim flash and rejected parisons is capped at 20 wt% because higher fractions reduce time-to-failure in ASTM D1693 ESCR testing at 50 °C and 10 % Igepal concentration. For UN-certified containers, the regrind source must be the same grade and no external post-consumer resin is introduced into the product-contact layer.
Conversion takes place on accumulator-head extrusion blow moulding machines with screw L/D ratios from 24:1 to 30:1 and grooved feed sections. Melt temperature is kept between 180 °C and 205 °C, while die head zones are set 5 °C to 10 °C above the mid-zone melt temperature to avoid sharkskin. Blow pressure of 0.6–0.8 MPa and mold cooling water at 8–12 °C are maintained. The bottom pinch weld is the limiting mechanical zone; a post-trim weld thickness below 1.5 mm is associated with drop-test failures at the lower corners even when the average sidewall thickness meets the design specification. Output parts include 5 L, 10 L, 20 L and 30 L jerry cans, 60 L open-head drums, and 120 L drum liners.
| Test | Condition | Standard reference |
|---|---|---|
| Drop impact | 1.2 m Packing Group II, -18 °C | UN 6.1.5.3; ADR 6.1.3 |
| Stack load | 3.0 m equivalent, 28 days, 40 °C | UN 6.1.5.3; ADR 6.1.3 |
| Hydrostatic pressure | 100 kPa, 30 min | UN 6.1.5.3; ADR 6.1.5 |
| ESCR | 50 °C, 10 % Igepal, F50 | ASTM D1693 |
| UV weathering | UV A 340 nm, accelerated | ISO 4892-3:2016 |
Which barrier strategy prevents solvent permeation in HDPE crop protection containers?
In crop protection packaging, the primary failure mechanism is not impact but solvent-induced swelling and permeation. Containers produced with DSM HDPE HB50 are processed on coextrusion blow moulding machines with a 3-layer or 5-layer die head; the virgin HDPE skin contains 0.5–1.5 wt% carbon black masterbatch and 0.1–0.3 wt% HALS-based UV stabilizer, while a regrind layer can include up to 25 wt% of clean post-trim material from the same grade. A thin polyamide or EVOH barrier layer, typically 2–5 wt% of total wall thickness, is placed between tie layers. When downstream fluorination is required for oxygenated or aromatic solvent formulations, surface fluorine content is controlled between 0.2 % and 1.0 %; the treated container is analysed by combustion ion chromatography before release. Compliance references include UN 6.1.5.3 for dangerous goods classification, ADR 6.1.3 for land transport, and FAO/WHO guidelines for pesticide storage when the crop protection product is classified as a hazardous formulation. Melt temperature is held at 185–205 °C, and die head pressure is kept below 35 MPa to prevent layer thickness non-uniformity. The finished product range includes 0.5 L, 1 L, 5 L and 10 L bottles and jerry cans with induction-sealed closures.
On continuous shuttle blow moulding lines for household and personal care packaging, the cycle time is governed by cooling of the pinch weld and neck flash rather than by screw plastication. DSM HDPE HB50 is processed with a white masterbatch at 1.0–2.0 wt% or a colour masterbatch at 0.5–2.5 wt%; fluoropolymer processing aid is limited to 0.02–0.08 wt% to control die deposit without reducing weld line strength. No carbon black is used in this segment. Regulatory documentation follows EU (EC) No 1223/2009 for cosmetic packaging, GMP provisions of EC No 2023/2006, and REACH Annex XVII restrictions for articles. Melt temperature is maintained at 185–205 °C, mold cooling water at 10–15 °C, and blow pressure at 0.7–0.9 MPa. Online trimming stations reject units with pinch weld thickness below 1.2 mm. Terminal bottle sizes range from 100 mL to 1 L for personal care and from 500 mL to 5 L for household detergents.
Under FDA 21 CFR 177.1520 and EU Regulation 10/2011, dairy and edible oil containers produced from DSM HDPE HB50 require food-contact-positive-list additives and migration documentation, provided the converter holds a food-contact compliance statement for the specific grade. The formulation uses a white masterbatch at 0.5–1.5 wt% and a processing aid at 0.02–0.08 wt%; no recycled material is placed in the food-contact layer unless specifically authorized under the relevant food-contact approval. Overall migration testing is performed under simulant D1 for milk and simulant D2 for oils, with a limit of 10 mg/dm² under EU 10/2011. Production runs on rotary wheel or shuttle extrusion blow moulding machines with melt temperature 185–205 °C, die head temperature 190–210 °C, mold cooling water 8–15 °C, and blow pressure 0.7–0.9 MPa. Terminal containers include 950 mL milk bottles, 1 L and 2 L juice bottles, and 1.89 L edible oil bottles; dairy lines apply 100 % online leak testing.
When underhood chemical reservoirs require ESCR and thermal dimensional stability
When an underhood washer reservoir or coolant expansion tank is blow moulded from DSM HDPE HB50, the service requirements combine thermal ageing, glycol exposure and high weld-line stress. The formulation adds carbon black masterbatch at 0.5–1.5 wt%, a hindered phenolic antioxidant at 0.1–0.3 wt%, and an acid scavenger at 0.05–0.15 wt% to slow oxidative degradation and neutralise acidic decomposition products from glycol. ESCR is tested under ASTM D1693 at 50 °C with 10 % Igepal; automotive OEM approvals often require F50 above 100 h, although published data for this specific HB50 configuration is limited and must be verified against current supplier documentation. Conversion uses suction blow moulding or 3D blow moulding to produce convoluted geometries without excessive pinch-weld waste. Melt temperature is set between 185 °C and 205 °C, mold temperature 15–25 °C is used to reduce warpage, and cycle times for a 2 kg reservoir are typically 70–110 s. Products include windshield washer fluid reservoirs, coolant expansion tanks, and headlamp cleaning system reservoirs.
For pharmaceutical dry dosage containers, DSM HDPE HB50 is processed under USP <661.1> plastic packaging testing and 21 CFR 211.94 requirements for drug product container evaluation, provided the grade is covered by the supplier’s extractables documentation. The processing additive set is restricted to a white masterbatch at 0.5–1.0 wt% and a processing aid at 0.02–0.06 wt%; regrind is excluded from the product-contact layer unless a dedicated extractables validation demonstrates compliance with USP thresholds. The extrusion blow moulding process runs in a controlled environment with melt temperature 180–200 °C, mold cooling water 10–15 °C, and blow pressure 0.6–0.8 MPa. In-line wall thickness measurement is normally specified at 100 % for bottles above 100 mL, and automatic leak detection rejects units with weld line defects below 1.0 mm. Terminal product types include 50 mL, 100 mL, 250 mL and 500 mL oral dosage bottles, with optional child-resistant closure fitments supplied separately.
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- DSM HDPE HB50 is manufactured under an ISO 9001 quality system and complies with relevant regulatory requirements.
- COA, SDS/MSDS, and related certificates are available upon request. For certificate requests or inquiries, contact: sales8@ascent-chem.com.
DSM HDPE HB50 is a high-density polyethylene extrusion blow-moulding grade. The product identifier contains the polymer class and a blow-moulding application marker; the suffix 50 is a legacy flow-class indicator and does not by itself specify a melt flow rate under current ISO 1133-1 conditions. The grade originates from a DSM polyolefin lineage that has been subject to portfolio transfer, and original technical data sheets are not consistently available in public repositories. Published data for this specific designation is limited. Where a certificate of analysis is not available, the resin is best bounded by the property envelope for high-density polyethylene blow-moulding grades in the medium-high melt-strength class. Density for this class is determined according to ISO 1183-1 and normally falls between 0.950 g/cm³ and 0.956 g/cm³. Melt mass-flow rate is determined according to ISO 1133-1:2022 at 190 °C/21.6 kg and commonly occupies 1.6–2.5 g/10 min. The resin is supplied as natural or compounded pellets. Pellet-size uniformity is specified to reduce screw-feeding variation in continuous shuttle and accumulator machines.
Incoming lot acceptance for this material class is controlled by density, melt flow, tensile yield, elongation, and environmental stress-cracking resistance. Tensile yield stress for high-density polyethylene blow-moulding grades in this density band is typically 22–28 MPa under ISO 527-2. Elongation at break commonly exceeds 600% under ISO 527-2. Notched Charpy impact at 23 °C under ISO 179-1/1eA is usually above 10 kJ/m². Environmental stress-cracking resistance in 100% Igepal CO-630 at 50 °C under ASTM D1693 condition B is generally above 30 h for virgin blow-moulding grades, but the result must be measured on the final article because moulded-in stress controls field performance. These values are class-typical and are not a replacement for the DSM HDPE HB50 certificate of analysis. The density tolerance in production lots is commonly held to ±0.001 g/cm³ and the MFR tolerance to ±0.3 g/10 min; this degree of control is required to maintain parison sag and wall-thickness distribution across batch changes.
Extrusion blow moulding of HB50-class materials is performed on continuous shuttle or accumulator machines. Screw L/D ratios of 24:1 to 30:1 and compression ratios of 2.5:1 to 3.5:1 are used on production-scale equipment. Barrel profiles are ramped from approximately 170 °C in the feed zone to 210–220 °C in the metering and die zones, giving a melt temperature of 180–220 °C. Die-head temperatures are held at the upper end of this range to minimize sharkskin. The material exhibits strong shear thinning; melt fracture can appear above 500–1000 s⁻¹ if the die-land length or die-gap geometry is not optimized. Die swell for high-density polyethylene blow-moulding grades of this density is typically 1.4–1.8. In production, the die-gap setting is usually 1.5–3.0 times the final part wall thickness, and parison programming with 20–40 points compensates for swell and sag, particularly in containers above 20 L. Blow air pressure is normally 0.4–0.8 MPa, mould temperature is maintained at 10–25 °C, and blow-up ratio is generally 1.5:1 to 2.5:1. These settings are class-typical and are adjusted to the specific accumulator head and mould geometry.
What Limits the Processing Window for HB50 in Large-Part Extrusion Blow Moulding?
Processing limits are established by the competing effects of parison sag, melt strength, and thermal oxidative degradation. In large-part production, the parison must remain dimensionally stable for hold times that can exceed 5 s between die exit and mould close. High melt strength reduces sag, but excessively high viscosity increases melt pressure and shear heating; this can produce localized melt-temperature spikes above the set point. Thermal degradation begins to accelerate above 240 °C and after prolonged hold time in accumulator heads. For unpigmented stock, the residence-time distribution should be maintained below 15 min; longer hold times shift melt flow and may generate oxidation products that reduce drop-impact performance. Moisture is not a primary drying concern for hydrophobic HDPE, but regrind stored at relative humidity above 60% can carry surface water that forms pinholes or surface splay. Regrind should be dried at 80 °C for 2 h before dry blending. Certain additive systems, including low-viscosity peroxide masterbatches and high-level metal stearate lubricant packages, can reduce melt strength and alter die swell; such combinations should be screened by extrudate-draw or rheotens testing before production. Batch-to-batch variation in regrind, particularly from post-consumer sources, changes MFR and density and requires incoming testing under ISO 1133-1:2022 and ISO 1183-1.
Representative applications for this class include blow-moulded industrial containers, 5–60 L jerrycans, detergent and agrochemical packaging, and technical reservoirs. Detergent and agrochemical formulations often contain surface-active agents that accelerate environmental stress cracking; higher comonomer content improves ESCR but reduces stiffness. For dangerous goods packaging, the final article must pass the stack, drop, and hydraulic-pressure tests required under ADR/RID/IMDG. Environmental stress-cracking resistance is assessed by ASTM D1693 or ISO 22088-2. The natural grade has no UV stabilization; outdoor service requires a carbon-black or hindered-amine-stabilized formulation qualified under ISO 4892-2. Automotive underhood use requires resistance to coolant and washer fluid; the fabricated part must be stress-crack tested with the actual service fluid. Published data for HB50 in continuous outdoor exposure or specific chemical service is limited, and qualification on the moulded article is required. Blow-moulded parts are often post-trimmed at the pinch weld; flash regrind can be reintroduced at controlled levels if it is kept free of contamination and tested for melt flow shift.
When HB50 Is Benchmarked Against Pipe, Film, and Injection-Moulding HDPE Grades
Pipe-grade HDPE is often bimodal with density near 0.950–0.956 g/cm³ and MFR below 0.5 g/10 min under 190 °C/21.6 kg to meet slow-crack-growth requirements. Film-grade HDPE is adjusted for bubble stability, low gel content, and shear response in blown-film dies; its MFR commonly occupies 0.5–2.0 g/10 min. Injection-moulding grades have MFR values above 10 g/10 min, low die swell, and negligible parison strength. HB50-class blow-moulding HDPE occupies a narrow intermediate envelope in which shear viscosity is low enough to fill the die without excessive head pressure while extensional viscosity preserves parison integrity and die swell. A direct substitution of pipe or injection-moulding feedstock into an HB50 blow-moulding process is technically inappropriate without rheological characterization and parison-sag measurement. The comparative table below summarizes class-typical values; the specific DSM HDPE HB50 certificate of analysis supersedes all class-typical data.
| Grade class | Density (g/cm³) | MFR (g/10 min, 190 °C/21.6 kg) | Characteristic melt strength | Primary process |
|---|---|---|---|---|
| HB50-class blow moulding | 0.950–0.956 | 1.6–2.5 | High | Extrusion blow moulding |
| Pipe grade | 0.949–0.956 | 0.2–0.5 | Very high | Pipe extrusion |
| Film grade | 0.945–0.955 | 0.5–2.0 | Moderate | Blown film |
| Injection moulding | 0.950–0.965 | 10–30 | Low | Injection moulding |
The tabulated values are class-typical ranges from industrial HDPE grade surveys and are not a substitute for the DSM HDPE HB50 certificate of analysis.
Regulatory Compliance and Test Standard Matrix
For food-contact use, the base high-density polyethylene may be evaluated under 21 C.F.R. § 177.1520, which permits olefin polymers subject to density, extractable fraction, and end-use condition limitations. European food-contact compliance is established under Regulation (EU) No 10/2011. Overall migration is measured under EN 1186; specific migration is assessed using EN 13130 methods when the formulation contains intentionally added substances with specific migration limits. REACH registration under Regulation (EC) No 1907/2006 is maintained by the resin supplier, and the processor is responsible for documenting SVHC content above the relevant threshold in the final article. Electrical or electronic parts are assessed under Directive 2011/65/EU. Packaging articles are assessed under Directive 94/62/EC. The compliance status of HB50-class material must be confirmed with the current commercial supplier because additive packages and polymerization aids vary across production sites and may affect food-contact or potable-water suitability.
| Standard or regulation | Scope | Application point |
|---|---|---|
| 21 C.F.R. § 177.1520 | Olefin polymers in food contact | Resin and final article |
| Regulation (EU) No 10/2011 | Plastic food-contact materials | Migration testing |
| EN 1186 | Overall migration test methods | Final article |
| Regulation (EC) No 1907/2006 | REACH registration and SVHC | Substance dossier |
| Directive 2011/65/EU | RoHS restricted substances | Electrical/electronic parts |
| Directive 94/62/EC | Packaging and packaging waste | Packaging article |
Operational boundaries for HB50-class HDPE include a melt-temperature ceiling of 230 °C for continuous operation and avoidance of additive packages that reduce melt strength. Amine-based antistatic masterbatches may interfere with surface quality and are not recommended without laboratory trials; the failure mode is not premature crosslinking but interfacial contamination and die-lip buildup. Post-consumer recyclate blending requires melt-flow and density testing under ISO 1133-1:2022 and ISO 1183-1 because recyclate batch-to-batch variance shifts parison sag and environmental stress-cracking resistance. A twin-screw compounding line with L/D of 36:1 can disperse recyclate blends and additive masterbatches, but published data for HB50 in post-consumer recyclate blends is limited; the blow-moulding operation should qualify each blend on the target accumulator or shuttle machine at production clamp force and blow rate. The resin is not a direct replacement for rotational moulding, blown film, or high-speed thin-wall injection moulding. Processing should be stopped if melt-flow drift exceeds ±0.3 g/10 min from the accepted lot value or if the melt temperature exceeds 240 °C, because both conditions indicate polymer degradation or feedstock contamination.
