PCC (Iran) HDPE HCM4265 is specified for extrusion blow moulding of rigid hollow articles. The downstream scenarios defined below are limited to established rigid packaging and industrial container conversion routes for high-melt-strength HDPE. Additive loadings and processing parameters are industrial starting-point windows, not absolute grade specifications; lot certificates, machine capability, and regional package certification override these ranges. No food-contact claim is made unless a specific lot is confirmed against FDA 21 CFR 177.1520 or EU Regulation (EU) No 10/2011. The grade is not intended for thin-wall injection moulding of caps and closures.

What Limits Low-Temperature Drop Resistance in UN-Rated Jerrycans?

Extrusion blow moulding of UN 3H1 jerricans and UN 1H1 tight-head drums with HCM4265 starts from 100 parts by weight of resin, 2.0–2.5 wt% carbon black masterbatch, 0.08–0.15 wt% of a blended phenolic-phosphite antioxidant package, and 0.05–0.10 wt% of a fluoropolymer process aid when die-lip melt fracture occurs. The conversion line is an accumulator-head shuttle blow moulder with a screw L/D ratio of 24:1–30:1, a die head set between 180 °C and 210 °C, and a parison programmer with a minimum of 30 axial wall-thickness control points; mold temperature is maintained at 10–25 °C and blow air pressure is set from 0.6 to 0.8 MPa. Die-head temperature control is maintained within ±5 °C; larger swings alter die swell and produce parison length variation. Pre-drying is not normally specified for HCM4265 unless storage RH exceeds 60% and visible surface moisture is present; when needed, 80 °C for 2 h prevents surface splay. The dominant process conflict is parison sag before mould closing. If melt viscosity at low shear falls below approximately 1 × 10⁵ Pa·s at 0.1 rad/s, axial wall thinning at the chime and pinch-off zones reduces hydraulic burst margin and low-temperature drop performance. Production-scale failure analysis on shuttle machines shows that pinch-off weld and chime regions are the main crack initiation sites under drop testing conducted according to 49 CFR 178.603 after conditioning at −18 °C for 24 h. Compliance for dangerous goods transport is anchored to UN Model Regulations Chapter 6.1, 49 CFR 178.509, 178.603 through 178.606, ADR/RID 6.1, and EU CLP Regulation (EC) No 1272/2008 for hazard communication. Terminal products are 5 L to 30 L UN 3H1 jerricans and 120 L to 220 L UN 1H1 tight-head drums for Packing Group II and III liquid dangerous goods up to a maximum specific gravity of 1.4 unless the certificate states a higher tested limit.

In the 0.5 L to 5 L household and institutional cleaning segment, HCM4265 is converted on continuous extrusion blow moulding lines with shot sizes below 5 L. The starting formula is 100 parts HCM4265, 1.0–3.0 wt% colour masterbatch, 0.05–0.12 wt% antioxidant, and 0.10–0.30 wt% slip/antistat concentrate. For bleach-containing formulations, a lot-screening test under ASTM D1693 using Igepal CO-630 is applied to the neck and shoulder region. Downstream process windows on single-station shuttle machines include a melt temperature of 175–205 °C, a mold temperature of 10–25 °C, blow pressure of 0.55–0.75 MPa, and a cycle time of 12–25 s. Pinch-off weld integrity is monitored by drop testing per ASTM D2463 after conditioning at −18 °C for 24 h; lot-to-lot melt flow variation exceeding ±5% relative to target shifts tail length and neck ovality. Industry compliance includes REACH Regulation (EC) No 1907/2006, the EU Detergents Regulation (EC) No 648/2004 for compatibility with detergent formulations, and ASTM D1693 for environmental stress-crack resistance. Terminal product types are 500 mL, 750 mL, 1 L, 2 L, and 5 L bottles for bleach, hard-surface cleaners, laundry detergent, and fabric softener.

Agricultural crop-protection containers in the 1 L to 20 L range expose HCM4265 to solvent systems including xylene, cyclohexanone, and emulsifiable-concentrate surfactants that accelerate environmental stress cracking. The resin is used as the structural wall in monolayer, surface-fluorinated monolayer, or three-layer co-extruded structures. In three-layer construction, the layer distribution is typically 90/5/5 or 85/5/10 by volume for HCM4265/tie-resin/polyamide or EVOH barrier. Monolayer starting formulation is 100 parts HCM4265, 0.15–0.35 wt% hindered-amine light stabilizer, 0.08–0.12 wt% phosphite antioxidant, and 0.5–2.0 wt% carbon black or pigment masterbatch according to photostability demand. Processing uses a co-extrusion blow moulder with 2–3 extruders, a HCM4265 melt temperature of 180–205 °C, and a parison programmer that reduces layer thinning at the shoulder and pinch-off. The main process conflict is barrier-layer instability during parison swell; wall-thickness variance greater than ±0.15 mm increases drop-test scatter and can invalidate UN certification under 49 CFR 178.603. Compliance is defined by UN Model Regulations Chapter 6.1, 49 CFR 178.509, 49 CFR 178.604 for leakproofness, and ASTM D1693. Terminal products are UN 3H1 jerricans for plant protection products, including selective herbicides, insecticides, and fungicides; lower-volume variants are used for adjuvants and growth regulators.

When Diesel Exhaust Fluid Containers Require ISO 22241-3 Compatibility

Diesel exhaust fluid is a 32.5 wt% urea solution with a pH range close to 9.0–9.5; HCM4265 packaging for this fluid is formulated to avoid additive systems that leach cations and alter ISO 22241-2 impurity limits. The starting formula is 100 parts HCM4265, 0.05–0.15 wt% primary hindered-phenolic antioxidant, 0.10–0.30 wt% UV stabilizer, and no calcium or zinc stearate lubricants; if mould-release is required, non-ionic or polymeric process aids are used at 0.05–0.10 wt%. Extrusion blow moulding runs on an accumulator or reciprocating-screw machine with melt temperature 180–205 °C, mold temperature 10–25 °C, and blow pressure 0.6–0.8 MPa. Closed-loop regrind of untrimmed flash is permitted up to 20 wt% when each regrind lot passes trace-metal and particulate checks according to ISO 22241-3 storage and handling requirements. The critical operational boundary is weld-line stress cracking under stacking load; stacking tests are performed according to 49 CFR 178.606 at 40 °C if regional packaging certification requires it. Terminal products include 10 L and 20 L AdBlue/DEF packs and 1,000 L IBC inner bottles manufactured with HCM4265 as the structural layer.

Personal care and cosmetic bottles made from HCM4265 are produced on reciprocating-screw blow moulders with shot sizes below 2 L. The starting formula is 100 parts HCM4265, 0.5–2.0 wt% colour masterbatch, and 0.05–0.10 wt% slip agent, processed at a melt temperature of 175–200 °C. Compliance is limited to EU Regulation (EC) No 1223/2009 for compatibility with cosmetic formulations and REACH Regulation (EC) No 1907/2006; no food-contact statement applies. Terminal products are 100 mL to 1 L bottles for shampoos, lotions, body washes, and hair conditioners.

Reducing Core Melt Temperature Below the Skin Set Point in Three-Layer Structures

In three-layer co-extruded non-food containers, HCM4265 is placed in the outer and inner skins to encapsulate a post-consumer recycled HDPE core. Layer output ratios are 15/70/15 or 20/60/20 by volumetric throughput. Skin formulation is 100 parts HCM4265 with 0.05–0.12 wt% antioxidant; the core can be a blend of up to 80 wt% washed PCR-HDPE and 20 wt% HCM4265 as a diluent to stabilize melt pressure. Processing uses three extruders feeding a three-layer spiral mandrel or accumulator head; skin melt temperature is 185–205 °C and core melt temperature is 165–185 °C to reduce gel and odour generation. The process conflict is core-layer gel agglomeration and skin-layer delamination under drop impact; if delamination is visually observed after drop testing per ASTM D2463 at −18 °C, the core melt temperature is reduced in 5 °C increments. Industry compliance for recycled content in non-food technical packaging includes EN 15343 for plastics recycling traceability. For food-contact applications, the PCR core is outside the default certification of this grade; EU Regulation (EC) No 282/2008 would require separate approval, and published data for this specific configuration is limited. Terminal products are 5 L to 20 L non-food industrial and automotive fluid containers where recycled content is specified.