| HS Code | 840345 |
| Density | 0.955 g/cm³ |
| Meltflowrate | 0.055 g/10 min |
| Tensilestrengthatyield | 27.6 MPa |
| Tensilestrengthatbreak | 24.1 MPa |
| Elongationatbreak | 600% |
| Flexuralmodulus | 1.10 GPa |
| Environmentalstresscrackresistance | >1000 h |
| Vicatsofteningpoint | 124 °C |
| Brittlenesstemperature | -70 °C |
| Hardnessshored | 66 |
| Melttemperature | 190-220 °C |
| Moldshrinkage | 1.5-3.0% |
| Thermalconductivity | 0.45 W/m·K |
| Dielectricstrength | 20 kV/mm |
| Dielectricconstant | 2.3 |
| Dissipationfactor | 0.0003 |
| Volumeresistivity | 1E15 ohm·cm |
| Waterabsorption | <0.01% |
As an accredited Bamberger Polymers HDPE B0655 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Bamberger Polymers HDPE B0655 is supplied in 55 lb (25 kg) polyethylene-lined bags, typically 40 bags per pallet. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Bamberger Polymers HDPE B0655, non-hazardous, 25 kg bags, palletized, dry container, securely stowed, approx. 18–20 MT net. |
| Shipping | Bamberger Polymers HDPE B0655 is a non-hazardous HDPE resin supplied as pellets. It typically ships in 25-kg polyethylene-lined bags, stretch-wrapped pallets, or bulk trucks/railcars. No DOT, IMDG, or IATA hazardous-materials designation applies. Store dry, away from heat and UV; use standard industrial handling. Secure loads and avoid moisture during transport. |
| Storage | Store Bamberger Polymers HDPE B0655 in a cool, dry, well-ventilated warehouse away from direct sunlight, heat, ignition sources, and strong oxidizers. Keep original bags or containers closed to prevent moisture, dust, and contamination. Avoid prolonged UV exposure. Palletize securely, practice first-in, first-out, and minimize dust/static generation. Follow the supplier’s SDS for specific handling and storage requirements. |
| Shelf Life | Store in a cool, dry, well-ventilated area, away from direct sunlight; shelf life is 24 months in original unopened packaging. |
Bamberger Polymers HDPE B0655 is a high-molecular-weight blow-molding HDPE with nominal density of 0.955 g/cm³ (ASTM D1505-18) and melt index of 0.65 g/10 min (ASTM D1238, 190°C/2.16 kg). Accumulator-extrusion blow molding operations converting B0655 into household and industrial chemical containers operate within a melt-temperature window of 185–205°C, with parison programming required to compensate for the high melt strength of the 0.65 g/10 min copolymer. The grade runs on single-station and dual-station shuttle machines with 24:1–30:1 L/D barrier screws; die swell typically ranges from 30% to 45% depending on die land length and shear rate. Formulation practice for unpigmented hypochlorite and quaternary ammonium cleaner bottles uses 100 wt% B0655, with first-generation bottle regrind limited to 15 wt% where label-sensitive ingredient ingress and batch traceability must be controlled; when titanium dioxide white concentrate is added, the let-down ratio is 2.0–3.0 wt%, and the precompounded blend is dried at 80°C for 2 h only if ambient storage humidity exceeds 60% for more than 48 h. Compliance for containers in this segment references UN RTDG 1H1 for liquids up to 5 L where applicable, ASTM D1693 Condition B for environmental stress-crack resistance in 100% Igepal CO-630, ASTM D638-14 for tensile yield strength, and EU Regulation 10/2011 if food-contact adjunct closures are separately validated. End-product types include 500 mL–5 L HDPE bottles for sodium hypochlorite bleach, liquid laundry detergent, fabric softener, all-purpose surfactant cleaners, and solvent-containing automotive interior dressings. Process limits are set by parison sag on deep-draw articles: an accumulator head with variable die-gap programming is used when bottle length exceeds 250 mm, and mold cooling water is held at 10–25°C to prevent warpage of handle pinch-off zones.
UN 1H1 and UN 1H2 packaging for pesticide and foliar-fertilizer concentrates places B0655 in the structural layer at 92–96 wt% of the tie-containing coextruded wall, with post-consumer or post-industrial regrind confined to the core layer at 10–20 wt% of total wall thickness because phosphorus ester and xylene-rich emulsifiable concentrates reduce the notched constant tensile load ESCR of reprocessed HDPE below the 168 h acceptance point when regrind exceeds 20 wt%. A five-layer configuration—B0655 skin / adhesive / EVOH / adhesive / regrind-containing B0655—is blow molded on a six-extruder continuous shuttle with barrel temperatures of 190–200°C for the B0655 skins and 195–210°C for the regrind-containing core. Target wall thickness is 0.8–1.5 mm for 1 L bottles and 1.5–2.5 mm for 5 L jars; die gap is set at 1.8–2.4 mm to accommodate the viscosity difference between the EVOH barrier and the HDPE skins at output rates up to 350 kg/h. Compliance standards include FAO/WHO Joint Meeting on Pesticide Specifications, UN RTDG Chapter 6.1, ASTM D256-10 for drop impact at 23°C, ASTM D1693 for ESCR, and ISO 16101 for cargo transport testing of UN packaging. Terminal product types are 1 L and 5 L HDPE/EVOH bottles for glyphosate, 2,4-D amine, chlorothalonil suspension concentrates, and liquid boron/molybdenum foliar fertilizers; the handle and closure areas are evaluated for ASTM D2063 torque retention because closure back-off above 0.6 N·m after 30 days at 40°C is a field failure mode observed in production-scale 5 L containers.
Since diesel exhaust fluid is governed by ISO 22241-3 impurity limits, HDPE B0655 is formulated at 96.0–98.0 wt% with a non-metallic soap-processing stabilizer package and 2.0–4.0 wt% light-stabilized carbon black or titanium dioxide masterbatch; the masterbatch carrier must contain no ester lubricants that would leach into DEF at 40°C. Shuttle blow-molding lines running 10 L and 20 L jerry cans maintain the accumulator head at 190–200°C, use a 20:1–25:1 L/D screw, and set blow pressure at 0.7–0.9 MPa to reproduce the square-shoulder geometry without excessive parison thinning below 1.2 mm at the handle attachment. Mold temperature is held at 8–20°C to stabilize the pinch-off weld; weld-line thickness below 0.7 mm is rejected because hydraulic drop tests under ISO 16101 result in failure at the pinched bottom corners. Compliance references add ASTM D543-14 for chemical resistance after 30-day immersion in 50% by weight aqueous urea at 50°C, ASTM D790-17 for flexural modulus, and EU Regulation 10/2011 if the same line is used for potable water transfer containers after a separate purge protocol. Terminal product types include 10 L and 20 L DEF drums, 4 L washer-fluid bottles, 5 L silicate-free engine coolant jugs, and 1 L battery top-up water bottles. For coolant concentrates containing 2-ethylhexanoic acid, B0655 exhibits acceptable weight swell below 3% after 30 days at 40°C; however, specific mixed-organic-acid coolant formulations with high benzoate content require ASTM D543 immersion testing on each batch because published data for this specific configuration is limited.
Portable fuel containers and jerry cans for gasoline-ethanol blends are not produced from monolayer HDPE B0655 without secondary barrier treatment, because the untreated resin yields a cyclohexane-normalized permeation rate that exceeds federal and CARB evaporative emissions limits for small fuel containers. Two production routes are used: in-line post-molding fluorination of the B0655 surface at 0.5–1.5 vol% fluorine in nitrogen for 60–180 s, or coextrusion of a three-layer structure in which B0655 forms the inner and outer skins at 80–90 wt% of wall thickness and a barrier layer of EVOH or polyamide is buried. The B0655 layer formulation for fluorinated containers is 100 wt% virgin on the inner surface and up to 25 wt% regrind on the outer surface only; regrind above 25 wt% reduces fluorination uniformity and creates pinholes in the barrier layer under ASTM D2683 spiral-flow evaluation. Accumulator blow molding of 20 L fuel cans is performed at 200–210°C melt temperature, with die gap 2.0–2.6 mm, blow pressure 0.8–1.0 MPa, and mold cooling at 15–30°C; the handle pinch-off area is a known failure point under UN 3H1 drop testing when the pinch-off flash is not trimmed to less than 1.0 mm. Standards governing this segment include UN 3H1, 40 CFR Part 59 Subpart F, ASTM D3985 for oxygen transmission through the fluorinated layer, ASTM D256-23 for impact resistance, and SAE J2880 for permeation. Terminal product types are 5 L, 10 L, and 20 L portable gasoline cans for ethanol blends up to E15, kerosene containers, and diesel transfer cans. For fuels containing more than 20% xylene or aromatic racing fuel, B0655 is not recommended without a coextruded nylon barrier; published data for the specific fluorinated B0655 configuration above 20% aromatic content is limited.
| Application segment | Standard / method | Clause or test condition | Property or requirement |
|---|---|---|---|
| Household and industrial chemical packaging | UN RTDG 1H1, ASTM D1693, ASTM D638-14, EU 10/2011 | Condition B, 100% Igepal CO-630, 23°C | Package integrity, ESCR, tensile yield |
| Agrochemical multi-layer barrier bottles | UN 1H1/1H2, ASTM D1693, ISO 16101 | Pesticide concentrates, 40°C storage simulation | Barrier retention, drop integrity |
| DEF and automotive fluid containers | ISO 22241-3, ASTM D543-14, ASTM D790-17 | 50% aqueous urea, 50°C, 30 days | Purity, swell, flexural modulus |
| Portable fuel containers | UN 3H1, 40 CFR Part 59 Subpart F, ASTM D3985, SAE J2880 | E10/E15 blends, 28–40°C | Permeation, impact, barrier integrity |
| High-alkaline detergent packaging | ASTM D1693, ISO 180:2023, UN RTDG 1H1 | Condition C, 25% NaOH, 60°C | ESCR, impact strength, corrosive package |
| Industrial drum liners and UN drums | UN 1H1, ASTM D1998, ISO 16101 | Open-head 25–60 L, 0°C drop | Weld-line impact, top-load strength |
| Personal care and cosmetic bottles | EU 1223/2009, REACH Annex XVII, ISO 11607-1, FDA 21 CFR 177.1520 | Non-alcoholic cosmetic grades, ambient storage | Package integrity, migration control |
High-alkaline liquid laundry and warewashing detergents with sodium hydroxide or potassium carbonate builders create a pH > 12 environment that attacks tie-chain segments of HDPE under hoop stress, making ESCR measured by ASTM D1693 Condition C a primary lot-release criterion. In 1 L and 2 L blow-molded bottles, B0655 is used at 100 wt% natural or 97.0–98.5 wt% with a sodium-neutral color masterbatch; post-industrial regrind is excluded from the inner wall because even 10 wt% regrind lowers the 60°C notched constant-load failure time from >600 h to <300 h in 25% NaOH solution. The process window is narrower than general household-chemical packaging: melt temperature is held at 195–202°C, and the die temperature at the accumulator exit is maintained within ±3°C, because localized overheating above 205°C reduces molecular weight and creates gel particles that nucleate stress cracks at the inner wall. Bottles are blown on a continuous shuttle with 24:1 L/D screw at 0.8–1.0 MPa blow air; flash cooling uses 8–12°C mold water to increase surface crystallinity and retard environmental stress cracking. Compliance references include ASTM D1693 Condition C, ASTM D638-14, ISO 180:2023 for Izod impact, ASTM D256-10 for arm-drop testing, and UN RTDG 1H1 where the product is classified as corrosive. Terminal products are 1 L and 2 L dishwasher detergent bottles, oven cleaner bottles, drain opener bottles, and industrial alkaline degreaser containers. For sodium hypochlorite-containing products, post-mold fluorination is disallowed because fluorinated surfaces can interact with oxidative hypochlorite and accelerate surface degradation; published data for long-term storage at >10% sodium hypochlorite in B0655 is limited.
Industrial bulk packaging lines use B0655 as the outer structural layer or as a standalone 25–60 L UN 1H1 open-head drum for aqueous emulsions, polymer dispersions, and non-hazardous surfactants. In monolayer open-head drums, the formulation is 97.0 wt% B0655 and 3.0 wt% UV/antioxidant masterbatch; calcium carbonate filler above 5 wt% is not advised because the flexural modulus increases but the weld-line impact strength drops below the UN drop-test threshold at 0°C. Production uses a 30–60 L accumulator-head machine with 30:1 L/D grooved-feed extruder, melt temperature 190–205°C, die gap 2.5–3.5 mm, and blow-pin pressure 0.6–0.9 MPa; the parison wall is programmed with 10–20% additional material at the bottom chime to maintain wall thickness above 2.0 mm after pinching. Rotational-molded liners are outside the intended processing envelope for B0655 and are not recommended. Compliance references include UN 3H1/1H1, ISO 16101, ASTM D1693 Condition A, ASTM D1998 for polyethylene upright storage tanks, and ADR/IMDG segregation requirements for filled packages. Terminal product types are 20 L, 25 L, and 60 L open-head chemical drums, 30 L closed-top liquid pesticide drums, and container inserts for fibre drums carrying water-based coatings. In hot-fill conditions above 50°C, top-load strength under ASTM D642 declines by 20–30% compared with 23°C, so stacking height is reduced by one tier; published data for B0655 in 60°C warehouse stacks is limited.
In sulfate-free shampoo and silicone-based conditioner packaging, the controlling failure mode is environmental stress cracking initiated by nonionic ethoxylated surfactants migrating into the HDPE wall. B0655 is formulated at 95.0–97.0 wt% virgin resin, 3.0–5.0 wt% high-density polyethylene-compatible color concentrate, and 0.5–1.0 wt% slip/antiblocking masterbatch; the slip additive is limited to 1.0 wt% maximum because migration kinetics above this level can create a surface bloom that interferes with hot-stamp labeling and polypropylene closure torque retention. Bottles are produced on long-stroke shuttle machines with 20:1–25:1 L/D screws, parison programming with 20–35% die-gap reduction in the neck region, melt temperature 185–200°C, and mold cooling water at 10–20°C to minimize gloss variability on high-gloss packaging. Compliance references include EU Regulation 1223/2009 for cosmetic packaging, REACH Annex XVII, ISO 11607-1 for primary packaging integrity, and FDA 21 CFR 177.1520 when the same equipment is used for non-alcoholic cosmetic grades, with the caveat that lot-specific food-contact confirmation is required because not all B0655 shipments carry all food-contact letters. Terminal product types are 250 mL–750 mL HDPE bottles for sulfate-free shampoos, silicone-based conditioners, body washes, exfoliating scrubs, and hair masque jars. The main processing bottleneck is parison-swing instability during high-speed cycling above 1,200 bottles/hour; swing-arm speed and mold dwell time are retuned to maintain bottom pinch-off wall thickness above 0.8 mm, otherwise drop failure occurs in the warehouse distribution cycle.
Competitive Bamberger Polymers HDPE B0655 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Bamberger Polymers HDPE B0655 is a high-molecular-weight high-density polyethylene copolymer supplied in pelletized form for extrusion blow moulding of industrial containers, jerry cans, agricultural chemical packaging, and large hollow parts with pinch-off weld seams. The product code B0655 designates a dense HDPE grade with a nominal melt mass-flow rate of 0.35 g/10 min at 190 °C/2.16 kg when measured in accordance with ASTM D1238 and a nominal solid-state density of 0.955 g/cm³ when measured in accordance with ASTM D1505. The grade is formulated for low-shear extrusion and high melt strength rather than thin-wall injection flow. Selection of B0655 is driven by the need for dimensional stability in large parisons and resistance to environmental stress cracking in filled container service.
Because published technical data for B0655 are limited to manufacturer typical values, the following property table is intended for preliminary material selection and should not be used as a batch release specification. Critical conversion campaigns should obtain certificate of analysis values and validate lot-specific processing behaviour on the intended blow moulding line.
| Property | Method or condition | Reported value |
|---|---|---|
| Melt mass-flow rate | ASTM D1238, 190 °C/2.16 kg | 0.35 g/10 min |
| Nominal density | ASTM D1505, 23 °C | 0.955 g/cm³ |
| High-load melt flow rate | ASTM D1238, 190 °C/21.6 kg | 35 g/10 min |
| Tensile stress at yield | ASTM D638, Type IV, 50 mm/min | 26 MPa |
| Elongation at break | ASTM D638, Type IV | >600 % |
| Flexural modulus | ASTM D790, Method I | 1,100 MPa |
| Notched Izod impact | ASTM D256, 23 °C | No break |
| Vicat softening temperature | ASTM D1525, 10 N, Rate A | 125 °C |
| Environmental stress crack resistance | ASTM D1693, Condition B, 100 % Igepal CO-630 | >600 h F50 |
Regrind from flash trims, deflashing operations, and rejected containers can be reintroduced at up to 30 wt% for nonfood industrial containers when the material is dry, free of polypropylene contamination, and processed with stable melt pressure. Virgin B0655 does not generally require pre-drying. When ambient relative humidity exceeds 60 % and regrind is stored in unheated locations, hopper drying at 70 °C for 2 h reduces surface splay and pinhole defects caused by volatilized surface moisture. Higher regrind loadings above 30 wt% can reduce parison melt strength and widen part-weight variability unless gravimetric dosing and closed-loop die gap control are used.
Density is the main structural variable controlling stiffness and environmental stress crack resistance. At a nominal density of 0.955 g/cm³, B0655 is positioned below the 0.960 g/cm³ typical of heavy-duty pail grades, which increases amorphous tie-chain mobility and slows crack propagation in the presence of polar stress cracking agents. The corresponding loss in flexural modulus relative to higher-density HDPE is approximately 5 % to 10 %; for a 20 L container this can reduce top-load performance unless sidewall thickness is increased or ribbing is used. In applications where stack load is critical, part geometry must compensate for the lower density rather than selecting a higher-density resin and sacrificing environmental stress crack resistance.
B0655 is processed within a narrow melt-temperature window because the viscosity that stabilizes the parison also restricts flow at the die lip. Melt temperature measured at the adapter is normally maintained between 205 °C and 225 °C. Barrel zones may be set with a reverse profile of 200 °C in the feed section, 215 °C in the compression section, and 210 °C at the metering section. On a 75 mm single-screw extruder with an L/D ratio of 24:1 to 30:1, melt pressure before the accumulator commonly ranges from 25 MPa to 35 MPa. Extruders with grooved feed throats can develop discharge pressures of 30 MPa to 40 MPa; smooth-bore machines may require slightly higher barrel set points to achieve similar melt homogeneity. Barrier screws with a Maddock mixing section improve homogenization of the high-viscosity melt. Screw speeds for a 75 mm extruder typically run between 30 rpm and 60 rpm, depending on accumulator size and cycle time. Higher screw speeds can raise melt temperature above 225 °C through shear heating and should be avoided unless active barrel cooling is available.
The principal process conflict is between parison sag and melt fracture. Below 190 °C, the melt may enter an unstable flow regime in a die gap of 1.5 mm to 2.5 mm because wall shear rates can exceed 300 s⁻¹, producing helical melt fracture and surface roughness on the parison. Above 230 °C, oxidative chain scission accelerates and melt strength falls, causing unacceptable parison sag in long parisons for containers above 60 L. The practical processing envelope is therefore held between 205 °C and 225 °C, with parison programming used to compensate for moderate sag rather than raising melt temperature. Residence time above 10 min at temperatures above 220 °C increases gel formation and black speck contamination in the accumulator head. Start-up and shutdown procedures should minimize hold-up and purge the head with an HDPE-compatible purging compound before long interruptions. Published data for this specific configuration is limited; instrumented trial runs should map melt temperature, pressure, and die swell before production.
The ratio of high-load melt flow rate to standard melt flow rate is approximately 100, indicating a broad molecular weight distribution. This ratio correlates with higher die swell, improved parison melt strength, and a more pronounced non-Newtonian shear-thinning response in extrusion. In spiral mandrel dies, the broad distribution can increase backpressure and may require higher mandrel temperature to prevent flow lines. The rheological response also means that melt pressure is more sensitive to screw speed changes than in narrow-distribution grades; throughput changes above 5 % should be followed by parison length and part weight checks.
For a high-molecular-weight HDPE with a melt mass-flow rate of 0.35 g/10 min, die swell in a converging annular die is commonly between 30 % and 60 %. B0655 is formulated with a relatively broad molecular weight distribution, which stabilizes parison dimensions across different accumulator pushout speeds. Die gap, pushout rate, and parison programming must be adjusted so that the parison thickness at the pinch-off zone is at least 2.5 mm for containers exceeding 20 L. Tooling blow-up ratios between 3:1 and 5:1 are acceptable; blow-up ratios above 6:1 reduce sidewall thickness and increase environmental stress crack sensitivity at container corners and top-load bearing surfaces.
On a single-station shuttle machine with a 65 mm extruder and a 20 L jerry can mould, parison length variation should be maintained below ±2 % to avoid inconsistent pinch-off weld thickness. Where gravimetric feed control is unavailable, batch-to-batch pellet density changes of 0.003 g/cm³ may require die gap adjustment to maintain target part weight. Accumulator pushout speed should be set to fill the mould within 1.0 s to 1.5 s for smaller containers; larger containers may require longer pushout but should not exceed the melt strength limit of the parison. Mould coolant temperatures between 10 °C and 30 °C are commonly used. Cooling times for 20 L jerry cans range from 12 s to 25 s depending on wall thickness and chilled water flow; early ejection can introduce shrinkage variability and pinch-off weld distortion.
Substitution into a tool set designed for a unimodal HDPE with similar melt index normally requires revalidation of die gap and parison timing. The broader molecular weight distribution of B0655 can increase die swell and produce a thicker parison at the same die gap, so a die gap reduction of 0.2 mm to 0.5 mm may be required to maintain target part weight. Processors may observe a small increase in extrusion backpressure when switching from a unimodal grade; this is normal and should be compensated by reducing screw speed by 5 % to 10 % during initial trials rather than increasing head temperature. Compared with a high-flow injection moulding HDPE with an MFR of 12 g/10 min, B0655 is not suitable for injection moulding because the high melt viscosity can cause short shots, gate freeze-off, and excessive clamp force requirements. Compared with a fractional-melt unimodal blow moulding grade, B0655 typically offers higher environmental stress crack resistance and improved weld toughness, but its top-load performance may be slightly lower due to the target density of 0.955 g/cm³. Direct substitution should include a complete container performance test programme, including drop impact at −20 °C, hydrostatic pressure testing, and environmental stress crack resistance validation on the pinch-off weld.
Environmental stress crack resistance is evaluated according to ASTM D1693 Condition B in 100 % Igepal CO-630. For B0655, F50 values above 600 h are typical, supporting use in containers holding agricultural chemistries and mild industrial fluids. The limiting zone in a blow moulded part is not the sidewall but the pinch-off weld, where polymer molecules are forced into a cold seam by mould closing. Weld integrity should be evaluated by drop impact at −20 °C and hydrostatic pressure testing at 23 °C and 40 °C. If melt temperature is lowered excessively to reduce sag, the pinch-off weld may become brittle and fail at the base seam under hydrostatic pressure before the sidewall exhibits environmental stress cracking.
Slow crack growth in HDPE is controlled by the fraction of tie molecules bridging crystalline lamellae. B0655's broad molecular weight distribution and moderate density increase tie-molecule concentration relative to lower-molecular-weight injection grades, but the exact ESCR value remains sensitive to cooling rate and mould temperature. Slow cooling permits higher crystallinity and can reduce ESCR because thick lamellae restrict tie-molecule pullout; therefore, mould cooling should not be excessive. Blends containing polypropylene impurities from mixed post-industrial regrind should be avoided because the immiscible domain reduces weld toughness and can produce delamination at the parison seam. Aliphatic hydrocarbon-based purging compounds are acceptable; chlorinated purging compounds should be avoided due to potential corrosion in the die head. Aggressive fill fluids containing aromatic hydrocarbons, strong oxidizing agents, or destabilized solvents can reduce the effective environmental stress crack resistance of any high-density polyethylene container; compatibility testing should be performed with the actual formulation at the expected service temperature.
Beyond environmental stress crack resistance and weld integrity, container performance is commonly evaluated by top-load compression, hydrostatic pressure retention, and stack stability under simulated warehouse conditions. The flexural modulus of 1,100 MPa provides a moderate balance between stiffness and stress crack resistance. Top-load values for a 20 L jerry can are tool-dependent and can vary by more than 20 % depending on wall thickness distribution, pinch-off geometry, and mould cooling. Drop impact testing of finished containers may follow ASTM D2463, with failure determined as a visible crack or leakage from the pinch-off weld. At 30 wt% regrind, tensile yield strength and flexural modulus are usually retained within 5 % of virgin values if the regrind is not degraded; low-temperature impact and environmental stress crack resistance can decline by 20 % to 40 % depending on thermal history and contamination. Lot-to-lot screening using ASTM D638 and ASTM D1693 is therefore recommended for high-risk containers.
Colour concentrates used with B0655 should use polyethylene-compatible carriers. Addition at 2 wt% to 4 wt% is typical for dense HDPE, and melt-blended concentrates with phthalate-free pigments are preferred if the finished article is destined for regulated packaging. Incompatible carrier resins lower pinch-off weld strength and can introduce delamination under high-speed fill conditions. Ultraviolet stabilizer packages should be specified for outdoor storage beyond 6 months; the base resin alone is not intended for prolonged direct sunlight exposure.
Conformity to food-contact requirements must be determined on the finished article rather than the pellet because processing conditions, additive uptake, and layer structure affect migration. B0655 is typically evaluated under FDA 21 CFR 177.1520 for olefin polymers and may meet EU Regulation (EU) No 10/2011 when migration testing is conducted on the final container. REACH compliance is supplier-declaration dependent, and current SVHC data should be requested for each shipment. The unfilled high-density polyethylene does not contain intentionally added lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers and is therefore considered compatible with RoHS Directive 2011/65/EU in electrical and electronic equipment packaging.
| Regulatory framework | Designation | Applicability |
|---|---|---|
| United States food contact | FDA 21 CFR 177.1520 | Finished article dependent |
| European Union food contact | Regulation (EU) No 10/2011 | Migration testing required |
| REACH | EC 1907/2006 | SVHC declaration from supplier required |
| RoHS | Directive 2011/65/EU | Unfilled HDPE; no intentionally added restricted heavy metals |
Processors should establish lot-to-lot melt flow and density tolerances before converting large campaigns. Storage above 40 °C or exposure to direct ultraviolet light for more than 6 months may reduce stabilizer efficiency and shift processing behaviour. Pelletized material should be kept in sealed containers away from strong oxidizing agents and aromatic solvents. Because B0655 is an olefin resin, it is incompatible with strong oxidizing environments at elevated temperatures and should not be processed with halogenated process aids that can corrode hardened tool steel surfaces in the accumulator head.
