Breplast HDPE TS COR HF
- Product Name: Breplast HDPE TS COR HF
- Factroy Site: Yinchuan, Ningxia, China
- Price Inquiry: sales8@ascent-chem.com
- Manufacturer: Ascent Petrochem Holdings Co., Limited
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- Breplast HDPE TS COR HF is typically used in formulations when melt flow rate and processing temperature must be controlled within specific ranges.
| HS Code | 263931 |
| Manufacturer | Breplast |
| Productcode | HDPE TS COR HF |
| Material | High-density polyethylene (HDPE) |
| Pipetype | Structured-wall HDPE pipe |
| Wallconstruction | Double-wall corrugated |
| Innersurface | Smooth |
| Outersurface | Corrugated |
| Primaryapplication | Non-pressure underground drainage and sewerage |
| Standardcompliance | EN 13476-3 |
| Ringstiffness | SN4 / SN8 depending on variant |
| Nominaldiameterrange | DN/OD 110-1200 mm |
| Color | Black |
| Jointtype | Integrated socket and spigot with elastomeric seal |
| Nominallength | 6 m |
| Servicetemperaturerange | -40°C to +60°C |
| Chemicalresistance | Resistant to most acids, alkalis, and salts |
| Impactresistance | High |
| Abrasionresistance | High |
| Uvstabilization | Carbon black |
| Flexibility | High |
| Recyclability | Recyclable |
| Hydraulicperformance | High flow due to smooth inner wall |
As an accredited Breplast HDPE TS COR HF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Breplast HDPE TS COR HF is supplied in 25 kg moisture-resistant bags, stacked on pallets and shrink-wrapped for storage. |
| Container Loading (20′ FCL) | Breplast HDPE TS COR HF is packed in 25 kg bags, palletized, and loaded into a 20′ FCL for export. |
| Shipping | Breplast HDPE TS COR HF is typically a non-hazardous high-density polyethylene resin. It is not regulated as dangerous goods under DOT, IATA, IMDG, or ADR. Ship as general cargo in original sealed packaging; keep dry and avoid heat, sunlight, and moisture. No UN number, hazard class, or packing group. Include SDS. |
| Storage | Store Breplast HDPE TS COR HF in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, and strong oxidizers. Keep original containers or bags tightly closed, clean, labeled, and off the floor. Avoid moisture, contamination, and static buildup. Use safe stacking and secondary containment where required. Follow the manufacturer’s SDS and local regulations. Do not exceed recommended storage temperatures. |
| Shelf Life | Shelf life: 2 years from date of production when stored in original packaging under dry conditions at temperatures below 40°C. |
In high-cavitation injection moulding of thin-wall dairy containers, Breplast HDPE TS COR HF is processed on hydraulic or hybrid machines of 350–450 mT clamp force with general-purpose PE screws of 45–70 mm diameter and 22:1–24:1 L/D ratio. A barrel profile of 180–190 °C, 195–205 °C, 210–220 °C, and 220–230 °C from feed to nozzle, with nozzle body held at 220–235 °C, keeps melt temperature within 200–230 °C. For a 0.55–0.75 mm sidewall tub, filling is completed in 0.18–0.35 s at injection speeds of 150–250 mm/s, followed by hold pressure of 450–600 bar for 1.0–1.8 s and cooling time of 2.8–4.2 s with mould temperature at 10–25 °C. The high-flow character permits 8–16 cavity tools with valve-gated hot runners or 0.6–1.0 mm cold runners without persistent short-shot formation. White pigmentation is achieved with a 60 wt% TiO2 masterbatch at 2.0–4.0 wt%, producing 1.2–2.4 wt% TiO2 in the moulded part. Slip and antiblock masterbatch is added at 1.0–1.5 wt% where nested tub denesting is a line-speed control. Migration compliance is assessed under FDA 21 CFR 177.1520(c) 3.2a and EU Regulation 10/2011; overall migration remains below 10 mg/dm² for aqueous and acidic simulants. Terminal articles include 150 g, 250 g, and 500 g dairy tubs, margarine containers, and frozen dessert packs. Flow length-to-wall thickness ratios of 180:1 to 220:1 are demonstrated at 230 °C and 600 bar using short-shot progression from 50% to 95% fill. Where barrier-layer insert moulding is required, tie resin based on maleic anhydride grafted polyethylene or EVA is used at 3–5 wt% of the barrier structure to prevent delamination.
| Article class | Governing reference | Measured limit or condition |
|---|---|---|
| Thin-wall dairy tubs, margarine containers, frozen dessert packs | FDA 21 CFR 177.1520(c) 3.2a | Food simulant extraction; no migration exceeding FDA specifications |
| Thin-wall food packaging within EU | EU Regulation 10/2011 Annex I and II | Overall migration ≤ 10 mg/dm²; additive-specific SML per Annex I |
| Organoleptic suitability for drinking water and food contact | EN 1622:2006 | No perceptible odour or flavour transfer under cold and warm contact |
How Do High-Cavitation Closure Moulds Balance High Melt Flow Against Torque and Backpressure Limits?
Closure manufacturing on 32–64 cavity tools requires the hot runner manifold to be held at 220–235 °C while nozzle tips are held at 230–245 °C. Breplast HDPE TS COR HF is processed with metering zone temperatures of 215–230 °C and mould temperatures of 8–18 °C to freeze tamper-band bridges without brittleness. For 30/25 mm screw caps and 26/22 mm snap caps, part weights are controlled at 1.8–2.5 g and fill time is held at 0.12–0.25 s; injection speed ranges from 180–300 mm/s, with hold pressure of 400–550 bar for 0.8–1.5 s. Total cycle time on high-speed closure machines is 4.5–6.5 s. Because the low-viscosity melt reduces plastication torque, backpressure is maintained at 50–100 bar only to ensure melt homogeneity without excessive shear heating. Erucamide is added at 500–1000 ppm and silica antiblock at 500–1000 ppm to control slip and cap-to-cap separation. Antioxidant package is maintained at 800–1200 ppm to limit yellowing during hot runner residence. Colour masterbatch is dosed at 1.0–2.0 wt%, keeping final pigment loading below 1.0 wt% to avoid tamper-band notch sensitivity. For two-stage closures requiring a soft EVA liner, the liner melt temperature is set independently at 180–205 °C and the two-shot transfer is sequenced before complete HDPE freeze of the shell. Compliance for organoleptic neutrality is verified under EN 1622:2006; food-contact status is maintained under FDA 21 CFR 177.1520(c) 3.2a and EU Regulation 10/2011. Terminal closure products are suitable for still water, dairy beverages, edible oil, and non-carbonated drink applications where oxygen barrier is not the limiting design variable.
For UN-certified open-head pails and tight-head jerrycans, Breplast HDPE TS COR HF is injection moulded in wall thicknesses of 3.0–4.5 mm using 600–1000 mT machines with screw diameters of 70–90 mm. Melt temperature is set at 210–230 °C, mould temperature at 15–30 °C, and hold pressure at 500–700 bar for 5–10 s; cooling time for a 20 L pail is 20–35 s. Carbon black masterbatch at 2.0–3.0 wt% provides UV stability for outdoor stacking, while hindered amine light stabiliser at 0.1–0.3 wt% is added for long-term weathering. Chemical resistance is evaluated in accordance with ASTM D543-21 using representative lading chemicals. The high-flow molecular structure of this grade imposes an operational boundary: environmental stress crack resistance is reduced relative to bimodal HDPE pipe grades, so pails and jerrycans intended for high-wetting surfactant formulations, nonylphenol ethoxylate-containing cleaning agents, or aggressive ester-based solvents require a lower-flow HDPE or post-mould annealing. Annealing at 80–100 °C for 20–40 min reduces moulded-in stress at handle gates and sidewall corners. Terminal products include 5 L, 10 L, and 20 L open-head pails for water-based paints, inks, adhesives, detergents, and powdered chemicals. Tight-head jerrycans produced from the grade are not recommended for UN certification under continuous load from stacked liquids above 40 °C unless stress cracking behaviour is first validated under ISO 16770:2019 with the intended lading.
Logistics Moulding: Impact and Environmental Stress Crack Resistance Trade-Offs Are Set by Gate Design and Hold Pressure
Collapsible crates, ventilation dunnage, and distribution totes moulded from Breplast HDPE TS COR HF typically use wall thicknesses of 1.2–3.0 mm with living-hinge sections reduced to 0.4–0.8 mm. Processing on 450–650 mT machines uses melt temperature of 215–235 °C, mould temperature of 12–25 °C, injection speed of 150–250 mm/s, and hold pressure of 350–500 bar. The high-flow characteristic fills thin hinge webs at lower pressure, but gate design must avoid over-packing of hinge zones because excessive hold pressure increases residual stress and reduces subsequent flexural fatigue life. Fan gates with land thickness of 60–70% of nominal wall thickness are preferred over pinpoint gates for large sidewalls. Nucleating agent based on sodium benzoate is added at 0.05–0.2 wt% to increase crystallisation rate and shorten cycle time, but over-nucleation above 0.3 wt% can reduce notched impact further. Notched Charpy impact is measured under ISO 179-1/1eA at 23 °C on 2 mm specimens; high-flow HDPE materials of this class typically show 4–6 kJ/m², with the lower end observed when moulded at high injection velocities and low mould temperatures. Environmental stress crack resistance is measured under ASTM D1693-15 condition B in 100% Igepal CO-630; published data for this specific configuration is limited, but the expected trend is a shorter failure time relative to high-molecular-weight blow moulding grades. Terminal articles include foldable 12 L and 20 L crates, dunnage trays, and ventilated tote boxes used in returnable logistics loops. Heavy-duty pallets requiring cold-brittleness resistance below −20 °C are outside the recommended service window for this high-flow grade.
Thin-wall housewares and storage boxes are injection moulded from Breplast HDPE TS COR HF at wall thicknesses of 0.8–1.5 mm on 150–300 mT machines. Melt temperature is set at 200–220 °C, mould temperature at 15–30 °C, injection speed at 120–200 mm/s, and hold pressure at 300–450 bar for 1.5–3.0 s; total cycle time ranges from 8–15 s depending on article height and core geometry. Colour masterbatch is dosed at 1.0–3.0 wt% in transparent, translucent, or opaque storage boxes, while antistatic masterbatch at 0.5–1.5 wt% is used when dust attraction must be controlled on display packaging. Dimensional stability is characterised under ISO 294-4:2018 after conditioning at 23 °C and 50% RH for 24 h; measured linear shrinkage is 1.5–2.5% in the flow direction and 1.0–2.0% transverse to flow for 2 mm nominal walls. Mould temperature differential across cores and cavities must be held within 5 °C to prevent warpage in tall storage boxes with sidewall aspect ratios above 3:1. Consumer product compliance is established under REACH 1907/2006, RoHS 2011/65/EU, and applicable portions of EN 71-3 where children’s storage articles are targeted. Terminal products include drawer organisers, garment hangers, storage boxes, and laundry accessories. The grade is processed without pre-drying at normal indoor humidity, but surface blush on appearance parts occurs when melt temperature falls below 195 °C or when mould surface condensation is present at relative humidity above 60%.
If Thin-Wall Technical Components Demand Controlled Shrinkage, Mould Temperature Uniformity Must Be Verified Before Tool Acceptance
Thin-wall technical mouldings such as protective caps, pipe end caps, filtration housings, and battery spacers made from Breplast HDPE TS COR HF are produced at wall thicknesses of 1.0–2.5 mm. Mould temperature for these components is maintained at 20–40 °C, and the cavity-to-cavity variation is verified at or below ±2 °C before dimensional capability studies are accepted. Melt temperature is held at 215–235 °C, with hold pressure of 400–600 bar and cooling time of 6–12 s for 2 mm nominal walls. Nucleating agent at 0.1–0.3 wt% reduces differential shrinkage between flow and transverse directions, but post-mould shrinkage remains measurable: ISO 294-4:2018 values for 2 mm plaques are 1.4–2.0% in flow direction and 1.0–1.8% transverse. Dimensional audit is performed with coordinate measuring machines after conditioning under ISO 291 at 23 °C and 50% RH. Heat deflection temperature under 0.45 MPa is measured according to ASTM D648-18 and is typically in the range of 65–75 °C for high-density polyethylene of this class; sustained load-bearing service above 60 °C is therefore not recommended without creep testing. Sink marks at bosses are controlled by limiting rib-to-wall thickness ratio to 0.6 or less and by using gas-assisted injection where local wall sections exceed 3.0 mm. Terminal products include temporary pipe caps for transit damage prevention, filter housings for non-pressurised water service, and protective plugs used in hydraulic connector shipping. The grade is not suitable for continuous immersion in strong oxidising acids or for applications requiring sustained contact with aromatic hydrocarbon solvents, which swell HDPE and reduce dimensional stability.
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- Breplast HDPE TS COR HF 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.
Breplast HDPE TS COR HF is a high-density polyethylene compound whose designation indicates twin-screw compounding, a corrosion-stabilised additive package, and a high-flow molecular architecture. The material is supplied as cylindrical pellets and is intended for thin-wall injection moulding of closures, industrial caps, battery vent components, and chemical handling articles requiring resistance to aqueous acids and alkalis. Because the grade-specific datasheet has not been published in full, the numerical ranges in this technical introduction are class-derived from high-flow HDPE compounds with melt flow rates in the 20–40 g/10 min range at 190 °C/2.16 kg when tested according to ISO 1133-1. Density for this class is typically 0.954–0.960 g/cm³ by ISO 1183-1. The product differs from standard HDPE pipe and blow-moulding grades by prioritising flow length, cycle time reduction, and chemical stabiliser dispersion over high melt strength and long environmental stress crack resistance. Published data for this exact grade is limited; therefore, the performance boundaries below are derived from the high-flow, corrosion-stabilised HDPE class and from standardised test protocols conducted on injection-moulded specimens prepared according to ISO 1873-2.
Processing behaviour is governed less by the low-shear melt flow value alone than by viscosity at high shear rates. The high-flow designation lowers the pressure required to fill narrow flow channels, but it also reduces the melt strength needed for extrusion blow moulding. This material should not be selected for parison-dependent processes or for constant-strain structural parts in aggressive surfactant environments.
Flow Length, Injection Pressure, and Gate Freeze Behaviour
Injection moulding machine selection for this flow class uses lower clamp force demands than standard HDPE at the same projected area. A part with projected area of 200 cm² and wall thickness 1.2 mm is commonly filled on an 800 kN machine with peak injection pressure between 60–90 MPa; a standard HDPE with melt flow rate below 5 g/10 min may require 100–140 MPa under identical gating and thermal conditions. Screw L/D ratios of 20:1–24:1 with compression ratios of 2.5:1–3.0:1 are common on production lines for this material class. Barrel temperatures are typically profiled from 180 °C at the feed zone to 230–250 °C at the metering zone, with mould temperatures maintained between 20 °C and 60 °C. Higher mould temperatures increase flow length and reduce weld-line visibility but extend cooling time and can increase post-ejection shrinkage anisotropy.
The high-flow architecture delivers measurable cycle time reductions in thin-wall parts. When wall thickness falls below 1.2 mm, hesitation effects at sharp corners and gate blush become processing constraints. Short injection times, typically 0.3–0.8 s for multi-cavity closure tools, produce shear rates above 10,000 s⁻¹ in the gate region. Under these conditions, the apparent viscosity of high-flow HDPE compounds drops to 80–150 Pa·s, compared with 200–400 Pa·s for standard injection moulding HDPE at the same shear rate. The practical consequence is a reduction in peak cavity pressure and a lower tendency to flash at parting lines, but also a greater sensitivity to gate freeze time. Thin gates freeze earlier in high-flow HDPE because the heat capacity per unit volume is similar while the melt front cools rapidly after filling stops. Packing pressure must therefore be applied within a shorter window; a packing delay above 0.5 s after fill can produce sink marks and poor gate sealing in closure assemblies.
| Property | Test method | High-flow HDPE TS COR HF class | Standard HDPE |
|---|---|---|---|
| Melt flow rate, 190 °C/2.16 kg | ISO 1133-1 | 20–40 g/10 min | 4–12 g/10 min |
| Density | ISO 1183-1 | 0.954–0.960 g/cm³ | 0.959–0.965 g/cm³ |
| Tensile yield stress | ISO 527-2 | 22–28 MPa | 25–30 MPa |
| Flexural modulus | ISO 178 | 1000–1300 MPa | 1200–1500 MPa |
| Charpy notched impact strength, 23 °C | ISO 179-1/1eA | 4–10 kJ/m² | 15–30 kJ/m² |
| Environmental stress crack resistance, 10 % Igepal, 50 °C, notched | ASTM D1693/B | 1–20 h | 100–1000 h |
Under the constraints of thin-wall design, tensile yield stress and flexural modulus remain in the range of 22–28 MPa and 1000–1300 MPa, respectively, when measured according to ISO 527-2 and ISO 178. Notched Charpy impact strength at 23 °C is typically 4–10 kJ/m² by ISO 179-1/1eA, lower than standard HDPE because high melt flow is achieved through reduced molecular weight and modified molecular weight distribution. The most significant difference from other HDPE grades is environmental stress crack resistance. Under ASTM D1693 condition B in 10 % Igepal CO-630 at 50 °C, class-typical high-flow HDPE exhibits time to 50 % failure of 1–20 h, whereas standard pipe grades often exceed 100 h and can reach 1000 h. This reduction is not a defect but a property cliff-edge: the material must not be used for pressurised pipe, snap-fit joints with high hoop stress, or constant-strain structural parts in contact with aggressive surfactants or polar solvents. The trade-off arises from lower tie-chain density and shorter terminal relaxation times of high-flow resins, which reduce the energy dissipation capacity at crack tips.
For closure applications, the limitation is often acceptable because the in-service strain remains below 2 % and the load is intermittent. Field failure modes observed on production-scale closure lines are more frequently linked to gate freeze, weld-line weakness, or excessive regrind addition than to chemical stress cracking. The twin-screw compounding step is critical for dispersing the acid-neutralising and antioxidant package; high-shear dispersion reduces additive agglomeration and improves lot-to-lot consistency compared with single-screw blending. Migration kinetics of processing-derived oxidation products in the polymer matrix can influence surface tack and colour during storage, particularly when regrind fractions are elevated or barrel residence time is not controlled.
What Corrosion-Resistance Claims Require Standardised Validation?
Corrosion resistance of high-density polyethylene is primarily a function of chemical permeation, oxidation, and stress cracking rather than metallic corrosion. The COR stabilisation package in Breplast HDPE TS COR HF is intended to neutralise acidic residues and inhibit hydroperoxide formation during processing and service. In immersion testing according to ASTM D543, the base HDPE class retains more than 90 % of tensile yield stress after 7 days at 23 °C in 30 % sulfuric acid, 10 % sodium hydroxide, and 10 % acetic acid. Published data for this exact grade is limited, and end-users should conduct chemical compatibility trials at the service concentration and temperature. Strong oxidising media remain outside the operational boundary: nitric acid above 40 %, chromic acid, and organic peroxides degrade polyethylene through chain scission and surface oxidation. Aromatic hydrocarbons, chlorinated solvents, and strong oxidisers cause swelling or oxidative degradation; the material is best suited to aqueous acid and alkali service below 60 °C continuous temperature and 80 °C short-term excursions.
Oxidative stability of the compound can be screened by oxidation induction time according to ISO 11357-6 at 200 °C; values above 20 min are typical for well-stabilised HDPE compounds, but the exact grade value should be verified from the certificate of analysis. The corrosion claim should not be interpreted as universal chemical resistance. In stressed applications involving low-pH condensates, the controlling failure mechanism may be stress cracking rather than bulk chemical attack, and the ESCR limitation discussed above applies. A test programme using ISO 22088-2 or ASTM D1693 under the actual service environment is therefore required before the material is specified for a new aggressive formulation.
In lot-to-lot release testing, compliance documentation for this product class generally includes food-contact and industrial safety statements. Regulatory status for food-contact use is based on the base olefin polymer rather than on proprietary stabilisers alone. Suppliers of HDPE grades in this class typically provide FDA 21 CFR 177.1520 verification, EU Regulation No 10/2011 migration certificates, and REACH compliance. The table below lists the standard designations under which the material is commonly assessed; the exact grade certificate should be obtained for the production lot.
| Requirement | Standard or regulation | Typical test condition |
|---|---|---|
| Olefin polymer food-contact compliance | FDA 21 CFR 177.1520 | Extraction and migration testing |
| EU plastics food-contact migration | EU Regulation No 10/2011 | Overall migration below 10 mg/dm² |
| REACH SVHC screening | EC No 1907/2006 | Candidate List screening |
| RoHS restricted substances | Directive 2011/65/EU Annex II | Pb, Cd, Hg, Cr(VI), PBB, PBDE |
If Regrind Fractions Exceed 20%, Melt Viscosity Drift Must Be Monitored
Because the high-flow architecture is sensitive to thermal history, closed-loop regrind of this material requires monitoring of melt flow rate, ash content, and oxidation induction time. Twin-screw compounding produces homogeneous stabiliser dispersion, but repeated injection cycles consume antioxidants and lower molecular weight through thermomechanical chain scission. In a production scenario with 30 % regrind and 70 % virgin material, the melt flow rate may shift upward by 5–15 % after five cycles, although published data for this exact grade is limited. The shift increases not because of contamination but because the high-flow resin has a lower initial molecular weight and therefore less tolerance for chain scission before viscosity falls below the processing window. If the melt flow rate exceeds the acceptable range or the melt temperature must be raised above 260 °C to fill the mould, the regrind fraction should be reduced.
Regrind should be ground to consistent particle size between 3–6 mm, with bulk density above 0.50 g/cm³ to maintain feeding stability in gravimetric hoppers. Extruder barrel temperatures should be profiled from 180 °C at the feed zone to 230–250 °C at the metering zone, with the melt temperature measured by an immersion probe rather than inferred from barrel set points. Use of vacuum devolatilisation is recommended if regrind has been stored outdoors or exposed to humidity above 60 % relative humidity. The material should not be combined with amine-based processing aids or certain metal stearates that may antagonise the phenolic antioxidant system and reduce oxidation induction time. This incompatibility is an operational boundary, not a routine constraint for uncontaminated closed-loop regrind.
The product is not suitable for extrusion blow moulding because parison sag under self-weight becomes severe at melt temperatures above 210 °C, and the high-flow formulation lacks the melt strength characteristics of standard HDPE blow-moulding grades. For injection moulding, the practical upper barrel temperature should not exceed 260 °C for extended residence time; above this threshold, chain scission accelerates and the resulting viscosity reduction can cause flash and non-linear shrinkage in thin-wall parts. Pre-drying is not normally required for virgin pellets because moisture absorption is below 0.01 % by ISO 62, but surface condensation from outdoor storage should be removed by drying at 80 °C for 2 h before processing.
