| HS Code | 876197 |
| Manufacturer | Birch Plastics |
| Product Name | HDPE PIR-HD03BK |
| Material Type | High Density Polyethylene (HDPE) |
| Recycled Content | Post-Industrial Recycled (PIR) |
| Color | Black |
| Density | 0.955 g/cm³ |
| Melt Flow Rate | 0.30 g/10 min (190°C/2.16 kg) |
| Tensile Strength At Yield | 24 MPa |
| Tensile Elongation At Break | 600% |
| Flexural Modulus | 1,100 MPa |
| Notched Izod Impact Strength | 80 J/m |
| Hardness Shore D | 65 |
| Heat Deflection Temperature At 0 46 Mpa | 75°C |
| Vicat Softening Temperature | 125°C |
| Water Absorption | 0.01% |
| Processing Method | Injection Molding |
As an accredited Birch Plastics HDPE PIR-HD03BK factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Birch Plastics HDPE PIR-HD03BK is supplied in 50 lb multi-wall bags, securely sealed and labeled for industrial handling and storage. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL) for Birch Plastics HDPE PIR-HD03BK: palletized 25 kg bags, shrink-wrapped, securely braced for safe transport. |
| Shipping | Birch Plastics HDPE PIR-HD03BK is supplied as black, post-industrial recycled HDPE pellets. It ships as a non-hazardous material in sealed moisture-barrier bags, gaylords, octabins, or bulk sacks on pallets via truck or rail. Store in a dry, clean area away from heat, UV, and contamination. No special dangerous goods documentation is required. |
| Storage | Store Birch Plastics HDPE PIR-HD03BK in a cool, dry, well-ventilated area, away from direct sunlight, heat, flames, and strong oxidizers. Keep original containers closed, labeled, and off the ground to prevent moisture and contamination. Avoid dust generation and prolonged UV exposure. Use first-in-first-out stock rotation. Prevent spills because pellets can create slippery surfaces. Follow the manufacturer's SDS and local regulations. |
| Shelf Life | Birch Plastics HDPE PIR-HD03BK: no defined shelf life; store sealed in a cool, dry place, away from sunlight, heat, and contaminants. |
In corrugated stormwater drainage pipe extrusion, post-industrial HDPE derived from blow-molding scrap and industrial packaging can enter the main wall formulation without pre-compounding when the line is specified with a grooved-feed extruder of L/D 30:1 or higher and a slide-plate screen changer containing 100/200/325 mesh breaker plates. The melt flow rate should be confirmed against the lot certificate under ISO 1133-1:2022 at 190 °C/2.16 kg; recycled HDPE pipe streams of this type generally operate between 0.3 g/10 min and 0.8 g/10 min, a range that maintains melt strength in corrugator forming. Industry compliance for gravity-flow drainage pipe follows AASHTO M294 and ASTM F2306 for 300 mm to 1,500 mm corrugated HDPE systems, with cell classification reported under ASTM D3350 and environmental stress crack resistance monitored under ASTM D1693 condition C. The formulation addition ratio depends on specification class: structural stormwater pipe walls use 25 wt% to 60 wt% HDPE PIR-HD03BK, while non-structural agricultural drainage and land drainage tubing are run at up to 100 wt%; where acidic catalyst residues are present in regrind, calcium stearate is dosed at 0.05-0.15 wt%. Downstream processing is single-screw or counter-rotating twin-screw extrusion into a corrugator with vacuum-forming blocks, followed by water spray cooling, inline perforation, and slitting; barrel zones are profiled from 180 °C at the feed throat to 215 °C at the die, with a melt temperature ceiling of 230 °C to prevent viscosity drift and oxidative degradation. Moisture content above 0.02 wt% creates microvoids and corrugation break, so pre-drying at 80 °C for 3-4 h is applied when sacks have been exposed to relative humidity above 60%. Finished products include twin-wall corrugated drainage pipe from 100 mm to 1,500 mm nominal diameter, stormwater retention and detention chambers, culvert liners, and non-pressure agricultural drainage tubing. Potable water service is not an allowed downstream use for this post-industrial flowstream.
When a triple-head pipe die is specified for coextruded non-pressure electrical conduit, the grade functions as a black outer or inner skin over a virgin HDPE core to supply carbon black pigmentation and surface hardness. The jacketing loading is typically 20 wt% to 40 wt% of the total wall thickness, because higher loadings may shift the compound away from the certified conduit formulation unless the full compound is retested. Industry compliance rests on UL 651A for HDPE conduit, NEMA TC-7 for smooth-wall coilable polyethylene conduit, and ASTM D3035 for dimensional and pressure-rated PE pipe, with lot-specific density and melt index recorded under ASTM D1505 and ASTM D1238. Processing requires each extruder to be equipped with a melt pump, because a layer thickness imbalance above ±1% can cause die swell differences and final wall eccentricity; melt temperature is held between 190 °C and 220 °C, and vacuum calibration sleeves with inlet water at 15-25 °C control roundness. Residual film, label adhesive, or crosslinked particles are removed with 124 mm candle filters or 325 mesh slide-plate screens, which are replaced when head pressure rises by more than 15% from the clean-state value. Terminal products are Schedule 40/80 HDPE conduit, power and communication innerduct, cable duct, and low-voltage fiber-optic pathway. The grade is not recommended as the sole compound in a listed conduit article because the listing body must evaluate the exact recycled compound; published data for this specific configuration is limited.
Accumulator-head extrusion blow molding of non-food industrial containers can introduce HDPE PIR-HD03BK at 30 wt% to 70 wt% in an ABA structure where virgin HDPE forms the inner and outer skins, or at 100 wt% in single-layer open-head pails not intended for food contact or solvent-containing product. The recycled stream is characterized under ASTM D4976 for molding and extrusion material designation, and environmental stress crack resistance is measured under ASTM D1693 condition B before a container geometry is released. When a design type is intended for liquids, qualification follows 49 CFR 178.509 and UN Model Regulations Chapter 6.1 package performance tests, and the design type must be tested with the exact recycled compound rather than a virgin reference. Processing parameters for high molecular weight HDPE recycled grades are melt temperature 190 °C to 210 °C, die head pressure 20-35 MPa, mold temperature 10-30 °C, and parison programming adjusted for lot-to-lot melt flow variation of ±0.2 g/10 min. Adding virgin high-density copolymer at 30 wt% moderates parison sag, but formulations above 70 wt% recycled content require a longer swell time and slower extrusion speed to avoid drop impact failure. Terminal products include 20 L to 220 L closed-head drums, industrial pails, non-food chemical containers, and automotive windshield washer fluid bottles. Direct food contact is outside the operating boundary of this post-industrial black stream unless a functional barrier is demonstrated under 21 CFR 177.1520 migration testing; storage of aggressive polar solvents and strong oxidizing agents should be excluded without ESCR and permeation data.
A 2,200-tonne hydraulic clamp injection molding cell running an 8-drop hot runner for 1,200 mm × 1,000 mm pallets can use HDPE PIR-HD03BK as the major flowstream when the material is dried to below 0.01 wt% moisture and the barrel is profiled from 190 °C at the feed throat to 220 °C at the nozzle. The addition ratio is 50 wt% to 100 wt% for pallet structures, with 10-20 wt% virgin high-density copolymer blended only when cold-temperature impact at -20 °C is contractually specified. Compliance for load-bearing pallets references ISO 8611-1:2021 for rated loads and durability, ASTM D638-14 for tensile yield and elongation at break, ASTM D256 for Izod impact, and ISO 178 for flexural modulus. The downstream injection process requires fill time of 4-6 s, hold pressure 60-80 MPa, cooling time 35-60 s for 25 kg pallets, and mold temperature 20-40 °C. Shrinkage is measured as 1.2-2.5% after 48 h at ambient temperature, and warpage is controlled by balanced gate placement rather than by raising mold temperature; if the melt temperature exceeds 230 °C, the viscosity drop increases flash formation around ejector pins and hot runner valve gates, while below 190 °C weld lines at gate junctions exhibit reduced impact strength. Finished types are export pallets, collapsible rigid crates, fish crates, dairy crates, and closed-loop distribution dunnage. The black color masks regrind inclusion, but light-colored product and direct food contact are not within the guaranteed operating limits.
For non-critical ancillary geosynthetic drainage sheet, the grade is let down at 10 wt% to 25 wt% into a virgin HDPE or LLDPE matrix to produce dimpled sheet and edge-drain filter panels, with recycled content claims reported under ISO 14021 and SVHC screening conducted under REACH. Density and melt flow controls follow ASTM D792 and ASTM D1238; primary barrier-layer geomembranes are excluded under GRI-GM13 because that specification requires virgin resin and oxidative induction time values that post-industrial black grades may not meet. Processing is flat-die sheet extrusion on a single-screw extruder with L/D 32:1 and melt temperature 190 °C to 210 °C, followed by vacuum embossing and inline trimming. Terminal products are geocomposite drainage cores, protection sheets, and foundation damp-proofing dimple boards. Published data for this specific configuration is limited.
Non-food building protection sheet and impact-resistant liner stock can be extruded from 50 wt% to 100 wt% HDPE PIR-HD03BK on a single-screw extruder with a barrier screw and melt pump, with L/D 30:1, melt temperature 200 °C to 220 °C, and polished roll stack temperatures of 60 °C to 80 °C. Mechanical acceptance references ISO 527-2:2012 for tensile properties and ASTM D256 for Izod impact; UV resistance for outdoor exposure beyond six months is verified under ASTM D2565. Edge trim is fed back as closed-loop regrind, and terminal products include temporary concrete curing sheets, studded protective membrane, and impact-resistant liner panels. Potable water contact and food packaging are excluded, and outdoor uses require the specific carbon black and antioxidant package to be confirmed by lot analysis.
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Birch Plastics HDPE PIR-HD03BK is a black post-industrial recycled high-density polyethylene pellet grade supplied for injection molding, profile extrusion, and compounding where a pre-colored recycled olefin stream can replace virgin HDPE in non-food contact applications. The model code separates the product from post-consumer and blended recycled grades: PIR designates post-industrial recycling, HD03 identifies the high-density polyethylene series, and BK indicates black pigmentation. The material is not a single-lot product; post-industrial feedstock composition, melt flow behavior, and residual additive loading are expected to vary across batches. Therefore, all numerical values in this document are stated as class-typical ranges for recycled high-density polyethylene unless the supplier’s certificate of analysis for PIR-HD03BK provides lot-specific values. Published data for this specific configuration is limited; no test result in this text should be interpreted as a guaranteed product specification.
Post-industrial HDPE derives from manufacturing scrap such as extrusion purge, blow molding flash, injection runner systems, trim, and off-spec parts collected before the article reaches a consumer. The contamination profile therefore differs from post-consumer recycled HDPE, which may carry label adhesives, food residues, oil, household chemicals, and mixed-color fractions. In PIR-HD03BK, the post-industrial route reduces the probability of polyethylene terephthalate or polypropylene cap contamination but does not eliminate the risk of silicone mold release carryover, carbon black concentrate agglomerates, or cross-contaminated purge from polypropylene lines. The physical consequences of such contamination include gel-like inclusions and inconsistent melt strength during sheet extrusion. Where the feed stream has been homogenized by shredding and repelletizing, batch-level traceability should be confirmed against the supplier’s process records. Lot-specific total volatiles may be measured using ASTM D6980, and differential scanning calorimetry according to ISO 11357-3 can provide oxidative induction time as an indicator of stabilizer retention. No food-contact claim under 21 CFR 177.1520 should be assumed without a specific supplier no-objection letter and migration testing appropriate to the end use.
On standard injection molding machines, the recycled HDPE chemistry of PIR-HD03BK requires screw and barrel conditions typical of high-density polyethylene. Barrel zone settings from 180 °C to 230 °C are used, with the rear zone set 20–40 °C below the nozzle to control solids conveying and reduce the chance of black spec formation from excessive shear heating. A general-purpose polyolefin screw with an L/D of 20:1 and compression ratio between 2.5:1 and 3.5:1 is sufficient for most single-cavity and multi-cavity work; high-speed packaging molds may require a mixing screw or controlled check valve because recycled melt viscosity can shift within the lot. The material does not require routine pre-drying because HDPE moisture uptake under ISO 62 is below 0.02% at 23 °C and 50% RH. If pellet surfaces are wetted from outdoor storage or condensation, pre-drying at 80 °C for 2 h in a desiccant dryer removes surface water without thermal degradation. Mold temperatures from 10 °C to 40 °C produce adequate crystallization rates; higher settings can increase shrinkage and should be avoided when dimensional tolerances are below 0.5%.
When processing PIR-HD03BK, shot weight and fill time monitoring are preferred over sole reliance on melt flow index because post-industrial HDPE can exhibit lot-to-lot variation in molecular weight distribution that is not fully captured by ISO 1133-1:2022. Clamp force requirements do not differ from virgin HDPE of equivalent melt volume flow rate; the projected area multiplier generally falls between 2 kN/cm² and 4 kN/cm² for HDPE injection molding. Production-scale injection molding lines with post-industrial HDPE have observed fill time shifts when switching lots; therefore, first-article inspection after each lot change should include shot weight, fill time, and gate seal or cushion stability.
On twin-screw compounding lines with an L/D of 40:1, vent port plugging is a more common failure mode with post-industrial HDPE containing paper labels or silicone oil than with virgin HDPE. Published data for PIR-HD03BK’s specific feedstock is limited, but the operating window should be validated on production-scale equipment. Screw configuration should include kneading blocks only after the melt seal and before the vent to control volatile entrainment. Operational boundaries include storage away from strong oxidizing acids and chlorinated solvents; HDPE is not recommended for continuous exposure to oxidizing environments above 60 °C or for contact with aromatic solvents that can swell the polymer. Avoid compounding PIR-HD03BK with amine-based flame-retardant additives that may interfere with carbon black pigment dispersion and thermal stabilizer systems; formulation trials should include baseline control lots. Pellet drying above 90 °C can cause surface tack and agglomeration. Outdoor storage of bulk boxes should avoid direct sunlight and rain ingress to reduce surface oxidation and moisture contamination.
During repelletizing and subsequent melt processing, screen pack configuration affects the removal of incidental elastomer particles and carbon black agglomerates. Post-industrial HDPE lines often use breaker plate screens with mesh packs in the 60/80/100 range and downstream continuous screen changers; however, published data for PIR-HD03BK’s specific filtration micron rating is limited. The presence of black pigment can complicate optical gel detection, so pressure rise across the screen pack is used as a real-time indicator of contaminate loading. A pressure differential that increases by more than 20–30% over a stable baseline is an operational trigger for screen change or backflush. Melt rheology can be screened by capillary rheometry at 190 °C across apparent shear rates from 100 s⁻¹ to 1,000 s⁻¹; a recycled HDPE grade intended for injection molding should maintain shear-thinning behavior comparable to a virgin HDPE with similar melt volume flow rate. If the supplier provides lot-specific ISO 1133-1:2022 melt volume flow values, process parameters should be adjusted against those values rather than against the class-typical range.
The substitution is most suitable for opaque industrial parts such as dunnage, crates, pallet stops, pipe spacers, material handling trays, and non-food storage containers. In these uses, the black pigmentation of PIR-HD03BK acts as an ultraviolet stabilizer when carbon black loading is sufficient; class-typical UV-stable HDPE formulations contain 2–2.5 wt% carbon black, but the actual loading in PIR-HD03BK should be confirmed by ash testing according to ASTM D5630 or supplier documentation. Mechanical property retention relative to virgin HDPE is not guaranteed because prior heat history and pelletizing can reduce elongation at break and impact strength. Under ASTM D638-14, class-typical virgin HDPE may exhibit tensile yield strength from 18 MPa to 30 MPa and elongation at break above 100%; post-industrial recycled HDPE can remain within that tensile yield range while elongation at break may fall to 20–200% depending on feedstock age, contamination, and stabilization. Designers should therefore avoid replacing virgin HDPE in living hinges, thin-wall food contact parts, or pressure-containing components without conducting end-use testing. When measured under ISO 178, flexural modulus of recycled HDPE can fall between 800 MPa and 1,500 MPa; the lower modulus may require rib thickness increases compared with virgin HDPE.
| Property | Test designator | Class-typical range |
|---|---|---|
| Density | ASTM D1505 / ISO 1183-1 | 0.94–0.97 g/cm³ |
| Melt volume flow rate at 190 °C, 2.16 kg | ISO 1133-1:2022 / ASTM D1238-20 | 0.2–20 cm³/10 min depending on injection or extrusion grade |
| Tensile yield strength | ASTM D638-14 / ISO 527-2 | 18–30 MPa |
| Elongation at break | ASTM D638-14 / ISO 527-2 | 20–200% recycled; virgin may exceed 300% |
| Flexural modulus | ISO 178 / ASTM D790-17 | 800–1,500 MPa |
Comparative positioning against other recycled HDPE products depends on feedstock origin and additive loading. Compared with a post-consumer black HDPE, PIR-HD03BK is expected to carry fewer label- and adhesive-derived contaminants because the stream is captured before consumer use; however, surface defect rejection data for this specific grade is limited. Compared with a virgin HDPE injection grade, the recycled material may show lower elongation at break and wider lot-to-lot viscosity variation. Compared with filled or compounded HDPE recyclates, PIR-HD03BK is specified as an unfilled black HDPE unless filler content is explicitly declared by the supplier. Processors selecting between PIR-HD03BK and a post-consumer grade should request total ash, melt flow, tensile, and odor panel data. Sourcing documentation should identify the industrial origin of the feedstock because pipe regrind, blow molding flash, and injection molding scrap can produce different molecular weight distributions and black pigment dispersion.
Regulatory documentation for PIR-HD03BK must distinguish between the recycled polymer and any additives used to produce the black pellet. The base high-density polyethylene may fall within ISO 1043-1 designation PE-HD, but the recycled content claim should be verified under ISO 14021 or an independent mass balance scheme. REACH registration obligations under Regulation EC 1907/2006 apply to substances imported or manufactured in the EU; recycled materials may be exempt from registration if the material has been recovered and the substance is already registered, but the specific exemption must be documented. RoHS Directive 2011/65/EU compliance should be confirmed for cadmium, lead, mercury, hexavalent chromium, PBB, and PBDE in the final article. Carbon black and other pigments must not introduce restricted polycyclic aromatic hydrocarbons above the limits specified in REACH Annex XVII entry 50. Because PIR-HD03BK is a post-industrial product, the absence of post-consumer food residues supports use in closed-loop industrial packaging; however, no claim should be made for direct food contact without migration testing under relevant national or EU framework legislation.
| Domain | Standard or directive | Required lot-level evidence |
|---|---|---|
| Resin identification | ISO 1043-1 | PE-HD designation on certificate |
| Melt flow rate | ISO 1133-1:2022 / ASTM D1238-20 | Lot-specific melt volume flow or mass flow |
| Density | ASTM D1505 / ISO 1183-1 | Lot-specific density or CofA |
| RoHS restricted substances | Directive 2011/65/EU Annex II | Supplier declaration or lab screening |
| REACH SVHC | Regulation EC 1907/2006 | SDS and SVHC candidate list declaration |
| Recycled content claim | ISO 14021 | Mass balance or supplier certificate |
