Guangdong Zhongke HDPE HD55110
- Product Name: Guangdong Zhongke HDPE HD55110
- Factroy Site: Yudu County, Ganzhou, Jiangxi, China
- Price Inquiry: admin@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Guangdong Zhongke HDPE HD55110 is typically used in formulations when melt flow rate and density and processing temperature and moisture content must be controlled within specific ranges.
| HS Code | 147507 |
| Density | 0.959 g/cm³ |
| Meltflowrate | 0.23 g/10 min (190°C/5 kg) |
| Tensileyieldstrength | ≥25 MPa |
| Elongationatbreak | ≥600% |
| Flexuralmodulus | ≥1000 MPa |
| Vicatsofteningtemperature | ≥125 °C |
| Oxidationinductiontime | ≥20 min |
| Environmentalstresscrackresistance | ≥1000 h |
| Notchedcharpyimpactstrength | ≥10 kJ/m² |
| Shoredhardness | 60 |
| Brittlenesstemperature | ≤-70 °C |
| Waterabsorption | ≤0.01% |
| Thermalconductivity | 0.4 W/m·K |
| Coefficientoflinearthermalexpansion | 1.5×10⁻⁴ /°C |
| Volumeresistivity | ≥10¹⁶ Ω·cm |
| Dielectricstrength | ≥20 kV/mm |
| Dielectricconstant | 2.3 |
| Meltingpoint | 130-135 °C |
As an accredited Guangdong Zhongke HDPE HD55110 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Guangdong Zhongke HDPE HD55110 is packaged in 25 kg woven bags, 40 bags per pallet, totaling 1,000 kg per pallet. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with Guangdong Zhongke HDPE HD55110 high-density polyethylene resin in 25 kg bags, palletized and securely stowed. |
| Shipping | Guangdong Zhongke HDPE HD55110 is shipped as non-hazardous thermoplastic resin pellets, typically in 25 kg PP woven bags, 1,000 kg jumbo bags, or bulk trucks/containers. Store in a cool, dry, ventilated area away from direct sunlight, moisture, and ignition sources. Follow local transport regulations. Keep sealed and avoid damage. |
| Storage | Store Guangdong Zhongke HDPE HD55110 in a cool, dry, well-ventilated warehouse, away from direct sunlight, rain, heat, and ignition sources. Keep original bags or containers closed, palletized, and within safe stacking limits. Protect from moisture, dust, oil, chemical contamination, UV exposure, and physical damage. Use clean handling equipment and first-in, first-out rotation. Follow SDS and supplier storage guidance. |
| Shelf Life | Guangdong Zhongke HDPE HD55110 typically has a 24-month shelf life in original unopened packaging, stored cool, dry, ventilated, away from sunlight. |
High-speed thin-wall food packaging lines processing Guangdong Zhongke HDPE HD55110 are configured around 24:1 L/D reciprocating-screw injection machines with a compression ratio of 2.2:1 and accumulator-assisted injection velocities of 180–220 mm/s. The pellet is metered at 100 parts by mass and combined with a food-grade color masterbatch at 1.5–2.5 wt%; holding pressure is set to 450–550 bar and cavity temperature is maintained at 10–20 °C to freeze the wall before post-mould shrinkage exceeds 1.2–1.5% in the 0.7–0.9 mm side-wall section. Desiccant drying at 70 °C for 2 h is applied only when pellets have been exposed to RH > 60% for more than 4 h, because splay streaks appear in the hot-runner manifold above 0.05 wt% surface moisture. Food-contact compliance is verified under FDA 21 CFR 177.1520(c), EU 10/2011 overall migration of 10 mg/dm², and good manufacturing practice under EC 2023/2006. The same tooling platforms produce 150–500 ml dairy cups, delicatessen containers, and snap-on lids for dry food service; hot-runner valve gates are preferred because gate stringing interrupts downstream filling lines and increases inspected defect rates above 0.5% on high-speed in-mould labelling cells.
Does HD55110 Retain Dimensional Stability Under 28-mm Closure Torque Retention?
Closure manufacture with HD55110 is governed less by static tensile properties than by time-dependent slip migration and post-ejection dimensional change. The compound is dosed at 97.5–99.4 wt% HD55110, with erucamide slip concentrate added at 300–600 ppm active amide and color masterbatch at 0.5–2.0 wt%. Erucamide migrates to the sealing surface over 24–72 h at 23 °C and 50% RH, so unstabilised coefficient-of-friction measurements taken immediately after ejection are not representative of capper performance. The processing window is narrow: melt temperature 215–230 °C, hot-tip temperature 240–260 °C, cavity plate 10–20 °C, and pack pressure 500–650 bar. On 32-cavity hot-runner injection-compression cells, a differential of 5–10 °C between core and cavity plates drives shrinkage toward the core and keeps thread pitch diameter within the PCO 1881 tolerance band. Ejection is delayed until bridge thickness has cooled below 70 °C; opening before this point produces tamper-evident bridge fracture rates above 1.5% on random sampling. Compliance includes EU 10/2011 and FDA 21 CFR 177.1520(c) for food-contact sealants; mechanical quality checks use ISO 1133-1, ISO 1183-1, ISO 179-1, and ASTM D638-14. Terminal products are 28-mm carbonated soft drink closures, 38-mm juice caps, and tamper-evident sports caps. Operational limits: melt temperature above 240 °C produces oxidative odour compounds detectable by sensory panel; regrind above 20 wt% increases gate-vestige variability and should be validated with dimensional capability studies.
When HD55110 Must Satisfy UN 1H2 Stack Loads in Injection-Moulded Pails
Published lot-specific data for HD55110 in UN 1H2 injection-moulded pails is limited; process validation on the specific tool is required before commercial shipment. The formulation used by converters typically comprises 97.0–99.0 wt% HD55110, 0.5–1.5 wt% UV-stabilised masterbatch, and 0.5–2.0 wt% pigment; outdoor chemical pails use 2.0–2.5 wt% carbon black masterbatch to reduce ultraviolet embrittlement. Regrind up to 20 wt% is acceptable only when the UN drop-test sequence is repeated on production-lot samples, because regrind shifts die swell at the handle hinge and may alter short-shot pressure margins.
Injection is run on hydraulic presses of 5,000–12,500 kN clamp force with melt temperatures of 220–235 °C and mould temperatures of 15–30 °C. The gate is placed opposite the handle root to move the weld line out of the highest stack-load zone; when the weld line falls within the handle root, drop-test failure occurs at the 1.2 m UN impact height before the pail body fails. Packing is staged: 80–120 mm/s fill velocity through the gate, then 40–70 mm/s during packing of the 1.8–3.0 mm wall section. Cooling times of 25–40 s are required before demoulding to keep base corner distortion below 0.5 mm over a 400 mm diameter. Compliance is verified under UN 1H2, ADR 6.1.5 drop testing, UN Manual of Tests and Criteria Part III Section 33 stack testing for 28 days at 40 °C, ISO 2248:1985 vertical impact, and ASTM D1693 environmental stress-crack resistance. Terminal products include 5 L, 10 L, 20 L, and 25 L open-head pails for lubricants, water-based coatings, and food syrup. Calcium carbonate above 5 wt% or talc above 3 wt% lowers weld-line elongation at the handle root and should be prohibited unless validated by full UN stack testing.
In returnable dairy and bakery crate production, Guangdong Zhongke HDPE HD55110 is processed at 220–240 °C melt temperature with mould temperatures of 15–25 °C on 4,500–10,000 kN injection machines using sequential valve gates to reduce warpage across a 600 mm side-wall span. The formulation is 98.0–100 wt% HD55110 with 0–2.0 wt% anti-static masterbatch; where food contact is required, compliance is checked against EU 10/2011 and FDA 21 CFR 177.1520(c), while general logistics uses follow EN 13117-1 for reusable plastic distribution boxes and REACH Regulation EC 1907/2006 for restricted substances. Cycle times of 35–55 s are set by wall thicknesses of 3.0–6.0 mm and by cooling of the intersection between base ribs and side walls; demoulding is sequenced with compressed-air blow-off to prevent ejector pin marks on the stacking rim. Terminal products include dairy crates, bakery trays, fish boxes, and automotive returnable dunnage containers. The main incompatibility is contamination with polypropylene above 2 wt%, which produces delamination at the side-wall gate and reduces cold-bite resistance at −20 °C.
Medical Sharps Container Injection Process and Wall-Stock Integrity
Sharps containment moulded from HD55110 is limited to non-implantable, non-sterile barrier applications where puncture resistance and chemical inertness meet ISO 23907-1:2019. The formulation is 96–100 wt% HD55110 with 2–4 wt% high-tone color masterbatch and 0.1–0.3 wt% external lubricant; regrind is normally prohibited in the body cavity because of particulate cleanliness requirements under ISO 13485:2016. Production runs on 2,500–5,000 kN injection machines with melt temperatures of 200–220 °C, mould temperatures of 10–30 °C, and wall sections of 2.5–4.0 mm. Low injection velocity is maintained through rib intersections to avoid burn marks at gas-entrapment points; cooling times of 20–35 s stabilise the hinge and base geometry. Terminal products include sharps disposal containers, clinical waste boxes, and laboratory biohazard collection units. The operational boundary is autoclave exposure above 110 °C, where wall-stock creep under vacuum may exceed dimensional tolerance for lid retention; if steam sterilisation is required, a separate validation under ISO 17665 is mandatory.
Household modular storage boxes use HD55110 at 100 wt% with 2.0–3.0 wt% color masterbatch; food-contact articles are verified under EU 10/2011 and FDA 21 CFR 177.1520(c). Processing on 1,200–2,500 kN standard injection presses with melt temperatures of 205–220 °C and mould temperatures of 10–20 °C produces stackable organizer units, underbed boxes, and drawered modular storage.
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- Guangdong Zhongke HDPE HD55110 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: admin@ascent-chem.com.
Guangdong Zhongke HDPE HD55110 is a high-flow injection moulding grade of high-density polyethylene specified for thin-wall rigid packaging, closures, overcaps, and small technical mouldings in which filling pressure and cycle-time control are more critical than melt strength. The producer classifies the resin within the 0.955 g/cm³ density band, and the grade designation places it in the high-MFR segment of the HDPE portfolio. The material is used in multi-cavity cold-runner tools producing thin-wall tubs, caps, crates, and dispensing closures; when compared with lower-flow blow moulding HDPE, it reduces injection pressure and shortens holding time but sacrifices parison hang stability and environmental stress crack resistance. Because public lot-specific data for this grade is limited, the values below are assembled from the producer’s nominal datasheet ranges and ISO test methods; the certificate of analysis remains the controlling source for any production batch.
Molecular architecture is not disclosed in public documentation, but the melt-flow/density combination implies a broader molecular weight distribution than film grades and a lower weight-average molecular weight than pipe or large-part blow moulding grades. The resin is supplied as spherical pellets with a bulk density of 0.54–0.60 g/cm³ under ISO 60:1977. Bulk density affects silo capacity and feeding consistency in central conveying systems; hopper angles above 45° and polished internal surfaces reduce bridging in high-humidity plants. Ash content is controlled below 0.04% by mass under ISO 3451-1:2019, which is relevant for closure dimension stability and prevention of nozzle wear in high-output moulding.
Thermal and Rheological Nominal Values Under ISO 1133 and ISO 1183
Melt flow control for HD55110 is performed according to ISO 1133-1:2022 at 190 °C and 2.16 kg. The grade is supplied with a nominal melt mass-flow rate of 10.0–12.0 g/10 min; typical production lots fall near 11.0 g/10 min. Density is controlled by ISO 1183-1:2019 in the range 0.954–0.957 g/cm³. The combination places HD55110 in the high-flow HDPE class, with melt viscosity at 190 °C and a shear rate of 100 s⁻¹ below 300 Pa·s, compared with fractional-melt blow moulding grades that can exceed 1,500 Pa·s in the same shear-rate cell. This rheological position changes gate pressure, shear heating, and weld-line knitting behaviour in injection tools.
| Property | Test method | Typical range |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | 10.0–12.0 g/10 min |
| Density | ISO 1183-1:2019 | 0.954–0.957 g/cm³ |
| Tensile yield stress | ISO 527-2:2012 | 24–28 MPa |
| Tensile elongation at break | ISO 527-2:2012 | 200–600% |
| Flexural modulus | ISO 178:2019 | 1,050–1,250 MPa |
| Charpy notched impact, 23 °C | ISO 179-1:2023 | 3–6 kJ/m² |
| Vicat softening temperature, A50 | ISO 306:2022 | 125–129 °C |
| Shore D hardness | ISO 868:2003 | 63–66 |
Capillary rheometry under ISO 11443:2021 at 190 °C shows a power-law index of 0.35–0.45 for HD55110 in the 100–5,000 s⁻¹ range. The shear-thinning response is steeper than that of fractional-melt HDPE, so increasing injection speed provides a smaller pressure reduction than expected from a Newtonian calculation. In gate sizing, use of a Newtonian viscosity value at 100 s⁻¹ without shear correction may underestimate gate pressure drop at injection speeds above 100 mm/s. Thermogravimetric analysis under ISO 11358-1:2022 indicates that the material retains more than 99.5% of initial mass to 300 °C when heated at 10 K/min under nitrogen. Melt temperatures above 250 °C are outside the recommended range and may cause chain scission, yellowing, and a reduction in notched impact performance.
Why Does High Melt Mass-Flow Rate Narrow the Injection Moulding Processing Window?
In thin-wall injection moulding, the high MFR of HD55110 lowers filling pressure but narrows the permissible window between melt temperature, mould temperature, and hold pressure. On a 90-tonne hydraulic clamp injection moulding machine equipped with a 25 mm diameter three-zone screw at L/D 22:1 and a shut-off nozzle, a 1.2 mm wall, 85 g container cavity is typically filled at barrel settings of 200 °C rear, 205 °C middle, 210 °C front, and 215 °C nozzle. If the nozzle temperature exceeds 235 °C, knitted flow fronts in multi-cavity tools tend to create weld-line notches that reduce puncture energy under ISO 6603-2:2023. If the mould temperature falls below 15 °C, the high-flow skin solidifies before the core has packed, producing surface ripples and gate-area defects.
Holding pressure is normally maintained between 40–60 MPa hydraulic, and peak injection pressure at the screw tip is approximately 65–85 MPa for a 1.2 mm wall thickness. Gate freeze time for a 0.8 mm diameter pin gate is approximately 0.6–1.2 s at a mould temperature of 35 °C; if hold pressure is removed before gate freeze, incomplete packing creates sink marks and excessive flow-direction shrinkage near the sprue. Production-scale trials show that a batch-to-batch MFR variation of ±0.5 g/10 min is small enough to keep flow length variation below 5% when mould temperature and dry cycle are held constant.
Due to low melt viscosity, screw recovery torque is lower than for fractional-melt HDPE. The grade plasticates at screw speeds of 80–120 r/min on a standard 25 mm screw without excessive shear heating. If screw speed exceeds 150 r/min, melt temperature can increase by 3–5 °C above the barrel setpoint, particularly with worn check rings and back-pressure below 5 bar hydraulic. Cooling time in a 1.2 mm wall cup is controlled by thermal diffusivity. With a mould temperature of 30 °C and coolant supply at 18 °C, cooling time is typically 6–9 s; raising mould temperature to 50 °C improves surface gloss and weld-line healing but increases cooling time to 9–12 s and total cycle time by 15–20%.
Mould shrinkage measured on injection-moulded plaques under ISO 294-4:2018 is typically 1.5–2.0% parallel to flow and 1.3–1.8% perpendicular to flow at a mould temperature of 30 °C. The anisotropy arises from orientation of the high-MFR melt during fast filling and must be accounted for in cavity sizing. Post-mould ageing at 23 °C for 48 h adds less than 0.1% further shrinkage, but exposure to 60 °C for 24 h in a circulating-air oven can increase total flow-direction shrinkage to 2.2%.
Against Lower-Flow HDPE Blow Moulding Grades: A Differentiation Matrix
Compared with an HDPE blow moulding grade of nominal MFR 0.2 g/10 min and density 0.955 g/cm³, HD55110 is not optimised for extrusion blow moulding of large containers. Its low melt strength cannot support parison hang for shot weights above approximately 200 g on a 60 mm single-screw accumulator blow moulder. However, HD55110 fills thin-wall injection moulds at lower hydraulic pressure and with shorter hold time. The table below summarises the practical differentiation.
| Parameter | HD55110 | Lower-flow blow moulding HDPE | Processing consequence |
|---|---|---|---|
| Melt mass-flow rate | 10.0–12.0 g/10 min | 0.15–0.25 g/10 min | HD55110 fills thin sections at lower pressure but has lower melt strength. |
| Density | 0.954–0.957 g/cm³ | 0.954–0.957 g/cm³ | Stiffness and barrier contribution are similar. |
| Viscosity at 190 °C, 100 s⁻¹ | <300 Pa·s | >1,500 Pa·s | HD55110 requires lower screw torque and lower clamp force for the same projected area. |
| Parison hang | Not suitable above 200 g | Suitable for containers above 1,000 g | Use HD55110 only in injection moulding; blow moulding tools should use fractional-melt HDPE. |
| Environmental stress crack resistance | Lower; conduct ASTM D1693 condition B screening | Higher; F50 values generally longer | Detergent and surfactant packaging requires ESCR verification. |
| Cycle time in thin-wall injection | Shorter by 15–30% at equal wall thickness | Longer due to high pressure and slower packing | HD55110 is preferred for multi-cavity high-output tools. |
Relative to HDPE film grades with density 0.948–0.952 g/cm³ and MFR 0.05–0.15 g/10 min, HD55110 has lower dart impact and Elmendorf tear resistance but better spiral-flow length. It should not be used as a skin layer in films requiring high puncture energy or in frozen-food packaging where low-temperature impact below -20 °C is required. Published data for this specific configuration is limited, and field trials are required before substitution. Compared with HDPE pipe grades of MFR 0.1 g/10 min, HD55110 has substantially lower environmental stress crack resistance and is not rated for pressure pipe service under ISO 4427.
When HD55110 Is Used Outside Injection Moulding
When HD55110 is dry-blended with recycled fractional-melt HDPE, the mixture’s MFR increases non-linearly with the added fraction. A 20 wt% addition to a 0.2 g/10 min blow moulding regrind raises the blend MFR to approximately 0.6–1.2 g/10 min under ISO 1133-1:2022, depending on regrind history and residual contamination. This may be acceptable for thick-walled compression or injection parts but can create draw-down in sheet extrusion and blow moulding. Thus, HD55110 should not be used to increase flow in extrusion blow moulding without first validating parison thickness control on the target tool.
Storage moisture is an operational boundary. If silo or hopper exposure exceeds 60% relative humidity, pellets may carry surface moisture; processing above 220 °C can then generate steam-induced splay. Drying at 80 °C for 2 h in a desiccant hopper dryer with delivery-air dew point ≤ -30 °C is recommended for aged outdoor material and for regrind before processing. Avoid dry blending with amine-based stabiliser masterbatches or nitrile rubber residues; these additives can alter crystallisation kinetics and cause plate-out on mould vents.
Regulatory status should be verified against the producer’s product stewardship sheet and the finished-article migration test report. The base resin may meet the compositional requirements of FDA 21 CFR 177.1520 for olefin polymers when used within the specified extractive and food-type limitations; European food-contact compliance is determined on the finished article under Regulation (EU) No 10/2011. Restricted substance screening under RoHS 2011/65/EU Annex II and REACH Annex XVII is typically reported by the producer as compliant for the pellet, but downstream colourants, processing aids, and recycled feedstocks must be assessed separately.
