| HS Code | 163060 |
| Density | 0.955 g/cm³ |
| Melt Flow Rate | 9.5 g/10 min |
| Tensile Strength At Yield | 26.0 MPa |
| Tensile Strength At Break | 20.0 MPa |
| Elongation At Break | 1000 % |
| Flexural Modulus | 1.10 GPa |
| Izod Impact Notched | 0.500 J/cm |
| Hardness Shore D | 65 |
| Vicat Softening Point | 125 °C |
| Deflection Temperature At 0 46 Mpa | 75 °C |
| Deflection Temperature At 1 8 Mpa | 45 °C |
| Thermal Expansion Coefficient | 1.2E-4 1/°C |
| Melting Point | 130 °C |
As an accredited Amco Plastic Materials HDPE 055952 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Amco Plastic Materials HDPE 055952 is supplied in 50 lb multi-wall bags, palletized and shrink-wrapped for safe transport and storage. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Amco Plastic Materials HDPE 055952 loaded in a 20-foot full container, securely stowed for export shipment. |
| Shipping | Amco Plastic Materials HDPE 055952 is a non-hazardous high-density polyethylene resin. It is not a DOT/IMDG/IATA regulated material. Transport in sealed bags, boxes, or octabins. No placards or special labels required. Keep dry, cool, and away from ignition sources. Standard freight handling applies. Use ordinary dry-van or container shipment. |
| Storage | Store Amco Plastic Materials HDPE 055952 in a cool, dry, well-ventilated area away from direct sunlight, heat, flames, and strong oxidizers. Keep original packaging closed and palletized to prevent moisture, dust, and contamination. Maintain ambient temperature, avoid prolonged UV exposure, and use first-in, first-out stock rotation. Clean spills promptly, as pellets can create slipping hazards. |
| Shelf Life | No specific shelf life established; stable under normal storage conditions. Keep cool, dry, and away from direct sunlight and heat. |
On accumulator-head shuttle blow moulding lines, HDPE 055952 is processed with 80–120 mm grooved-feed extruders operating at L/D 24:1–30:1. The certificate of analysis is checked for density in the 0.950–0.957 g/cm³ band per ASTM D1505-18 and melt flow rate in the 0.2–0.8 g/10 min band per ASTM D1238-20 at 190 °C/2.16 kg. Barrel zone setpoints are held between 180 °C and 210 °C; the accumulator head is maintained at 200–215 °C. The parison programme uses a diverging die gap from 2.0 mm to 4.5 mm to compensate for sag. Die swell for high-density polyethylene is observed in the range 30–50%; the blow-up ratio is set at 2.0:1–3.5:1 for non-round containers. Mould cooling water enters at 10–20 °C and exits below 30 °C. Blow air pressure of 0.6–1.0 MPa is applied after the pre-blow delay. Cycle time for a 20 L jerrycan with 1.2 kg part mass is typically 60–110 s. The use of 25 wt% post-industrial regrind is accepted for non-UN containers; UN-rated 1H1 drums and 3H1 jerrycans require 100% virgin HDPE with traceable lot numbers unless the regrind is generated from the same production line and validated under ADR/RID Chapter 6.1. Food-contact containers require compliance with FDA 21 CFR 177.1520; EU food-contact exports are covered by EU Regulation (EU) No 10/2011. Pre-drying is not required for sealed boxes stored below 60% RH. Resin exposed to ambient moisture above 60% RH for more than six months is dried at 80 °C for 2–3 h. ESCR testing per ASTM D1693-15 Condition B is required for agricultural chemical and surfactant packagings; values below 20 h are rejected for aggressive liquid service. Notched Izod impact per ASTM D256-10e1 is monitored on container sidewalls; brittle failure below 80 J/m indicates excessive cooling or molecular weight mismatch. Finished products include 5–60 L industrial containers, 200 L tight-head drums, and 1000 L IBC liners when coextruded with a 2–3 wt% carbon-black outer layer for UV resistance.
Flat-die sheet extrusion of HDPE 055952 requires a die land length-to-gap ratio of 10:1–20:1. Land lengths below 10:1 produce visible sharkskin at haul-off speeds above 8 m/min. The melt pump is operated at a suction pressure of 3–5 MPa and a discharge pressure of 12–18 MPa. Barrel zone setpoints are 180–220 °C; the flexible lip die is heated to 200–220 °C. A three-roll stack with polished chrome rolls is run at 60–90 °C for sheet thickness 2–12 mm. Thickness tolerance for sheet below 3 mm is held within ±0.05 mm using automatic die bolts. Sheet produced from HDPE 055952 is used for cutting boards, chemical containment trays, and thermoformed truck bed liners. FDA 21 CFR 177.1520 covers food-contact uses; EU Regulation (EU) No 10/2011 applies for export to the European Union. Moisture absorbed above 0.05 wt% causes microbubbles in sheet; a desiccant dryer at 80 °C for 2 h is recommended for regrind with high surface moisture. Melt strength is sufficient for 12 mm sheet without sag on a horizontal roll stack.
For geomembrane service, HDPE 055952 is converted into 1.00–3.00 mm flat sheet. The formulation contains 2.0–3.0 wt% carbon black masterbatch with a particle size below 25 nm to meet UV ageing criteria. Carbon black dispersion is checked by ASTM D5596-03; agglomerates larger than 30 µm in a 1 m² sample are rejectable. Wedge welding is run at 220–260 °C with a speed of 1.5–3.0 m/min. Seam peel adhesion per ASTM D6392-12 must exceed 80% of parent sheet yield strength. Air channel testing at 250 kPa is performed for 5 min; a pressure drop greater than 10 kPa indicates a leak. High-pressure oxidative induction time per ASTM D5885-06 is run at 200 °C; values below 60 min for a 1 mm sheet indicate insufficient stabilizer package. Tensile properties per ASTM D6693-04 must show yield strength above 20 MPa and break elongation above 700% for standard GRI-GM13 HDPE geomembrane. Terminal products include landfill caps, wastewater lagoon liners, and heap leach pads in mining. HDPE 055952 should not be used without UV stabilization for exposed installations exceeding two years; unstabilized sheet will embrittle.
| Property | Test method | Threshold/control band |
|---|---|---|
| Thickness | ASTM D5199-12 | ≥1.00 mm |
| Density | ASTM D1505-18 / ISO 1183-1:2019 | ≥0.940 g/cm³ |
| Carbon black content | ASTM D4218-15 | 2.0–3.0 wt% |
| Carbon black dispersion | ASTM D5596-03 | ≤30 µm agglomerates |
| High-pressure OIT | ASTM D5885-06 | ≥100 min at 200 °C |
| Break elongation | ASTM D6693-04 | ≥700% |
When drawn into monofilament and raffia tape, HDPE 055952 is processed on 45–90 mm single-screw extruders with L/D 24:1–30:1. Barrel temperatures are set at 210–250 °C; the die is heated to 230–260 °C. The melt is quenched in water at 30–50 °C through an air gap of 20–40 mm. Draw ratio is set between 6:1 and 10:1 depending on final denier. Annealing rolls at 90–120 °C are followed by a relaxation stage of 3–8%. For raffia tape lines, water bath temperature is maintained at 35–45 °C; tape speed reaches 250–350 m/min after stretching. HDPE 055952 can be compounded with 2–5 wt% titanium dioxide masterbatch for UV-stabilized agricultural twine. Melt fracture at the die lip occurs if the die land length is below 5:1 or if melt temperature drops under 220 °C. Finished products include woven HDPE sacks, agricultural shade netting, baler twine, and industrial rope. Tensile tenacity on oriented tapes is measured per ISO 2062:2009; values above 0.30 N/den are typical for export-grade woven fabric.
When corrugated pipe production incorporates post-industrial regrind, HDPE 055952 is dry-blended and fed to 60–120 mm grooved-feed single-screw extruders with L/D 30:1–36:1. Barrel zone temperatures are 180–220 °C; the pipe die is held at 195–225 °C. The corrugator mould blocks are cooled to 20–40 °C with closed-loop water. Post-industrial regrind is incorporated at 20–30 wt% for non-pressure agricultural and land drainage pipe. Post-consumer recyclate is not used in pipe sold under AASHTO M294 or ASTM F2306 unless the recyclate is certified to the same cell classification. A 5–10 wt% carbon black masterbatch is added for UV resistance. Wall thickness is 0.75–2.50 mm depending on diameter. Vacuum calibration holds the liner against the corrugator blocks at -0.02 to -0.05 MPa. Melt pressure before the die is monitored at 15–25 MPa; pressure fluctuation above ±0.5 MPa causes visible weld lines and dimensional drift. Offline ring stiffness per ISO 9969:2016 is used to verify class SN4/SN8. For 100 mm diameter SN8 pipe, ring stiffness exceeds 8 kN/m² and creep ratio is below 4 per ISO 9967:2016. The addition of 30 wt% regrind reduces melt strength by 10–15%, which is compensated by raising the die head temperature 5 °C. HDPE 055952 is suitable for corrugated pipe when its density is 0.950–0.956 g/cm³ and its melt index per ASTM D1238-20 at 190 °C/2.16 kg is 0.3–0.8 g/10 min; grades with melt index above 1.0 g/10 min will sag in the corrugator. Finished products include 100–600 mm land drainage pipe, highway edge drains, and stormwater retention structures.
| Blend condition | Loading | Melt pressure band | Wall thickness tolerance | Product standard |
|---|---|---|---|---|
| Virgin + carbon black masterbatch | 0 wt% regrind; 5–10 wt% carbon black | 15–25 MPa | ±0.05 mm | ISO 9969:2016 |
| Post-industrial flake | 20–30 wt% | 15–25 MPa | ±0.10 mm | AASHTO M294 |
| Certified post-consumer recyclate | ≤10 wt% | 15–25 MPa | ±0.15 mm | ASTM F2306 |
In blown film lines, HDPE 055952 is processed at a die gap of 0.8–1.2 mm and a blow-up ratio of 3:1–5:1. Barrel zones are set from 190 °C to 230 °C; the spiral mandrel die is held at 200–225 °C. The high-stalk bubble is maintained with a frost line height of 6–10 die diameters. Film thickness is controlled between 10 µm and 100 µm by automatic air ring chillers. Dart drop impact per ASTM D1709-16a for a 25 µm film is typically in the range 100–250 g; Elmendorf tear per ASTM D1922-15 in the machine direction is lower than the transverse direction due to orientation. Adding 20–30 wt% LDPE improves tear balance and heat-seal initiation at 115 °C. HDPE 055952 film is used for T-shirt bags, bin liners, and food-contact liners under FDA 21 CFR 177.1520. Processing limitations: melt temperatures above 235 °C generate oxidative gel in the film; resin stored above 60% RH should be dried at 80 °C for 1–2 h. A 2–3 wt% slip/antiblock masterbatch is added for films below 20 µm to prevent blocking.
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High-density polyethylene stock designated 055952 from Amco Plastic Materials is a semicrystalline polyolefin product supplied in stock-shape form for machining, thermoforming, and structural fabrication. The numerical code 055952 is a distributor-specific stock-keeping identifier rather than an ASTM or ISO grade designation; it must be referenced alongside the lot-specific certificate of analysis and mill test report when regulatory conformances or mechanical properties are required. Because published data for this specific configuration is limited, the property ranges below reflect the general HDPE sheet and machining stock class and are not guaranteed lot-specific specifications.
HDPE 055952 is based on linear polyethylene with a density range typical of high-density grades, 0.940–0.970 g/cm³. The polymer consists of long methylene sequences with low branch content, producing crystallinity on the order of 60–80% by differential scanning calorimetry. Density, molecular weight distribution, and crystallinity govern stiffness, environmental stress cracking resistance, and extrusion response. The following table summarizes the property envelope for HDPE sheet and machining grades; values are not guaranteed specifications for 055952 unless confirmed by lot certification.
| Property | Test method | Typical range | Technical note |
|---|---|---|---|
| Density | ASTM D1505 | 0.940–0.970 g/cm³ | Higher density increases stiffness but may reduce environmental stress cracking resistance. |
| Melt index | ASTM D1238 | 0.20–0.90 g/10 min | Determined at 190 °C and 2.16 kg; extrusion sheet grades typically lie at the low end to reduce sheet sag. |
| Tensile yield strength | ASTM D638 | 20–30 MPa | Test speed and specimen conditioning affect yield. |
| Flexural modulus | ASTM D790 | 900–1,600 MPa | Reported values may be secant or tangent modulus depending on data source. |
| Shore D hardness | ASTM D2240 | 60–70 | Hardness is a surface measurement and does not predict abrasion resistance. |
| Vicat softening temperature | ASTM D1525 | 120–130 °C | Not to be treated as a continuous service temperature. |
| Brittleness temperature | ASTM D746 | < -75 °C | Indicates low-temperature impact transition; not a design load rating. |
| Water absorption, 24 h | ASTM D570 | < 0.01% | Explains dimensional stability in wet environments. |
The processing window is narrower than the resin melting point alone suggests. Sheet extrusion melt temperature should remain between 180 °C and 230 °C; at melt temperatures above 260 °C, oxidative degradation generates gel defects and yellowing, while below 170 °C, incomplete fusion produces weld lines and low sheet impact strength. Melt index is the primary rheological control. A melt index below 0.2 g/10 min raises extruder motor torque and die head pressure in single-screw extruders; a melt index above 1.0 g/10 min increases melt curtain sag and thickness variation in flat die lines. For production-scale single-screw extruders with L/D ratios of 24:1 or greater, the die lip gap is typically set at 1.05–1.20 times target sheet thickness to compensate for draw-down.
Because the product is converted by machining and welding, lot-to-lot variation in crystallinity rather than average melt flow rate often controls edge finish and dimensional recovery. CNC routing with carbide tooling at surface speeds between 200–400 m/min and positive rake geometry reduces melt smearing; cool air or flood coolant may be used to limit local temperature rise. Hot gas welding of HDPE 055952 requires melt-matched HDPE welding rod. Gas temperature of 210–220 °C at the weld root, with a side angle of 45–60°, should be used; extrusion welding uses barrel temperatures between 200–220 °C. Preweld surface oxidation must be removed by planing or scraping immediately before welding. Solvent wiping with isopropanol may be used but must completely evaporate before heat application. Joint tensile strength typically reaches 70–90% of parent material strength under controlled welding conditions, though published data for the 055952-specific configuration is limited.
The Vicat softening range of 120–130 °C does not define long-term service. Under continuous mechanical load, HDPE exhibits creep and stress relaxation at much lower temperatures. For general HDPE grades, design stress at 23 °C is often limited to 3–5 MPa; at 60 °C, creep modulus can drop below 200 MPa after sustained loading. Published data for HDPE 055952-specific creep behavior is limited, so long-term load-bearing parts should be evaluated under ISO 899-2 or ASTM D2990 tensile creep at the intended service temperature. The material should not be used above 65 °C under continuous structural load unless a stress-rupture evaluation supports the design.
Natural HDPE without UV stabilizer has limited outdoor life. Accelerated weathering under ASTM D2565 or ISO 4892-2 shows surface chalking and tensile loss after 1,000–2,000 h of UV exposure for unpigmented material. Carbon black loadings of 2.0–2.5 wt% are typical for enhanced weather resistance; black HDPE sheet may be claimed as UV-resistant only when the lot certificate lists the carbon black level and weathering test results. White and color grades require hindered amine light stabilizers and should not be assumed equivalent to UV-stabilized black sheet.
Chemical resistance of HDPE 055952 is generally strong for aqueous acids, alkalis, and salt solutions at room temperature. Concentrated strong oxidizing acids, chlorinated solvents, and aromatic hydrocarbons are incompatible or cause swelling and stress cracking. Prolonged exposure to wetting agents and alcohols may accelerate environmental stress cracking under ASTM D1693 conditions. The product should not be used with dichloromethane, toluene, or xylene without specific immersion testing because these solvents reduce yield strength and swelling resistance. For chemical tanks, full-scale immersion testing under ASTM D543 at service temperature and stress is required. Compliance claims are valid only when the lot-specific certificate of conformance lists the applicable regulation. HDPE resins intended for food contact are generally evaluated under FDA 21 CFR 177.1520 and, for the European Union, EU 10/2011; any statement of food-contact suitability must be confirmed against the supplier’s lot-specific documentation.
When a machined part is converted from polypropylene to HDPE 055952, the HDPE will generally provide better low-temperature impact toughness but lower heat deflection temperature and lower stiffness than homopolymer polypropylene. When it is converted from UHMWPE, the HDPE will be easier to machine and will provide higher stiffness, but it is not a direct substitute for UHMWPE in high-abrasion, low-friction bearing service. Under ASTM D638, HDPE yield strength is typically higher than UHMWPE and lower than polypropylene; under ASTM D256, HDPE notched impact strength is generally lower than UHMWPE and less temperature-sensitive than polypropylene.
| Material | Density (g/cm³) | Tensile yield strength (MPa) | Flexural modulus (MPa) | HDT at 0.455 MPa (°C) | Coefficient of linear thermal expansion (×10⁻⁶/°C) |
|---|---|---|---|---|---|
| HDPE 055952 class | 0.940–0.970 | 20–30 | 900–1,600 | 70–90 | 100–200 |
| UHMWPE | 0.930–0.935 | 17–25 | 600–1,000 | 65–85 | 130–200 |
| PP homopolymer | 0.900–0.910 | 30–40 | 1,200–1,700 | 95–120 | 80–150 |
| LDPE | 0.910–0.925 | 8–12 | 150–400 | 40–50 | 150–250 |
Selection should be governed by the full set of mechanical, thermal, and tribological requirements. HDPE 055952 is not recommended for continuous sliding against stainless steel under load without lubrication, because HDPE wear rates under ASTM G77 sliding-wear conditions are higher than UHMWPE and acetal grades. It is generally specified for chemical tank lining, ductwork, cutting fixtures, marine fender pads, water treatment weirs and baffles, and secondary containment components where higher stiffness than LDPE and better processability than UHMWPE are required.
HDPE 055952 should not be confused with injection-molding HDPE grades with melt indexes above 5 g/10 min; those grades flow more easily but exhibit lower melt strength and may produce thinner or less uniform sheet. Compared with HDPE pipe resins, sheet grades often have broader molecular weight distribution to control sag and improve melt strength; pipe resins may carry stress-cracking classification under ASTM D3350 or ISO 9080 that sheet stock does not automatically satisfy. If the stock contains recycled resin, the property envelope may shift because post-consumer HDPE often has lower tensile impact strength and higher melt flow drift compared with virgin material. The lot-specific certificate of analysis must state whether the product contains reprocessed resin under ISO 14021 or regional recycled-content claims.
Pre-drying is not generally required because HDPE is not hygroscopic; however, when moisture is present from outdoor storage, warm air drying at 60 °C for 2–4 h may be used before extrusion welding. Avoid welding with polypropylene filler rod; the melt mismatch produces poor fusion and brittle joints. Do not flame-treat beyond 45–50 dyn/cm because oxidation may reduce heat-seal strength and create low-molecular-weight surface species. Batch-to-batch variance in sheet stock is most commonly observed as thickness variation and residual stress in thicker cross sections. Panels above 25 mm should be inspected for flatness prior to CNC machining; measured camber across a 1,200 mm span should be checked against the lot-specific packaging tolerance. For critical wet-chemical containment, a full-scale immersion test under ASTM D543 at the maximum service temperature and stress condition is required. Certification and technical data should be obtained from the lot-specific certificate before use in food-contact or potable-water applications.
