| HS Code | 891753 |
| Polymer Type | Polypropylene Homopolymer |
| Density | 0.915 g/cm³ |
| Melt Flow Rate 230 C 2 16 Kg | 16 g/10 min |
| Bulk Density | 590 kg/m³ |
| Tensile Strength At Yield | 35 MPa |
| Tensile Modulus | 2100 MPa |
| Flexural Modulus | 1900 MPa |
| Elongation At Yield | 11% |
| Notched Izod Impact 23 C | 27 J/m |
| Heat Deflection Temperature 0 45 Mpa | 110 °C |
| Vicat Softening Point | 155 °C |
| Melting Point | 165 °C |
As an accredited MARLEX PP HC116FB factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | MARLEX PP HC116FB polypropylene resin is packaged in 25 kg moisture-proof bags, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL: MARLEX PP HC116FB loaded in a 20-foot container, secured on pallets, protected from moisture for safe transport. |
| Shipping | MARLEX PP HC116FB is a polypropylene resin supplied as solid pellets. Ship in clean, dry containers or lined bags, avoiding moisture and direct heat. It is non-hazardous under normal transport conditions. Ensure proper labeling, secure loading, and protection from damage during transit. |
| Storage | Store MARLEX PP HC116FB in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed when not in use to prevent moisture contamination and dust accumulation. Maintain ambient temperatures and avoid stacking excessively. Follow manufacturer guidelines for shelf life and handling to preserve material quality. |
| Shelf Life | Shelf life is indefinite when stored indoors, dry, and away from direct sunlight and excessive heat. |
On a 1,800 mm wide chill-roll cast-film line equipped with a 105 mm single-screw extruder with a barrier feed section and a 32:1 L/D ratio, Marlex PP HC116FB is processed at a melt temperature of 232–248 °C, measured by a flush-mounted thermocouple in the die adapter. The granular feed does not require drying unless storage at relative humidity above 60% exceeds 48 h, because surface moisture can produce splay, surface haze, and corona-treatment nonuniformity. For heat-sealable lamination webs, the formulation is set at 96.5–97.5 wt% HC116FB, 2.0–2.5 phr of a 20 wt% synthetic silica anti-block masterbatch, 0.5–1.0 phr erucamide slip masterbatch, 0.04–0.08 phr phenolic/phosphite antioxidant, and 0.02–0.05 phr calcium stearate acid scavenger. The polymer base complies with FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011 as amended; overall migration is evaluated according to EN 1186-1:2002 and remains below 10 mg/dm² when the specified masterbatch loadings are observed. Melt is extruded through a slot die with a gap of 0.6–0.8 mm, an air gap of 20–60 mm, and a combined vacuum-box and air-knife quenching assembly. The web is quenched on a mirror-chromed chill roll maintained at 18–30 °C and a second matte roll at 20–35 °C, then corona-treated to 38–46 mN/m according to ASTM D2578-23 and slit in-line at 180–300 m/min for film thicknesses from 15 µm to 80 µm. Edge trim is ground and returned to the same layer at up to 10 wt%, with melt-pressure variation held within the extruder’s normal control band. Terminal articles include printed heat-sealable lamination webs for snack foods, pasta, confectionery, textile packaging, floral wrap, and adhesive-tape backing films.
The nominal melt mass-flow rate of Marlex PP HC116FB is 11.6 g/10 min at 230 °C/2.16 kg under ISO 1133-1:2022, placing the resin in the intermediate-viscosity band for thin-wall injection moulding. In production-scale stack moulds with 48–72 cavities, a melt temperature of 220–250 °C, injection velocities of 80–150 mm/s, and holding pressure of 50–75% of peak injection pressure are used. Flow-path-to-thickness ratios up to 250:1 are employed for 0.8 mm wall sections; beyond this boundary, short-shot risk rises at the lower melt-temperature limit. The formulation for food-contact caps and closures is 100 phr HC116FB, with optional 0.05–0.20 phr sodium benzoate or sorbitol-based nucleating agent to accelerate crystallization and reduce cycle time, 0.05–0.10 phr calcium stearate as acid scavenger, and 1.0–2.0 phr high-dispersion colour masterbatch. Nucleating agent above 0.20 phr produces only marginal further cycle-time reduction and can reduce impact strength; organoleptic neutrality for direct food contact is maintained by avoiding release agents and overloading migratory antistatic additives. Injection moulding is performed on a reciprocating-screw machine with a 20:1–24:1 L/D screw and a non-return valve, clamp force from 4 kN/cm² to 6 kN/cm² of projected part area, mould surface temperature of 10–40 °C, injection pressure of 70–120 MPa, back pressure of 0.5–1.5 MPa, and cooling time of 4–10 s for wall thicknesses of 0.8–1.2 mm. Resin residence time above 230 °C should not exceed 5 min; extrusion plastication at back pressure above 1.5 MPa raises shear heating and accelerates thermo-oxidative chain scission. The applicable compliance set includes FDA 21 CFR 177.1520(c) 1.1a for olefin polymers, EU Regulation (EU) No 10/2011 with overall migration below 10 mg/dm², and EU 94/62/EC heavy-metal limits of 100 mg/kg total for lead, cadmium, mercury, and hexavalent chromium. Terminal parts converted from this grade include beverage caps, cosmetic closure overcaps, dairy container lids, thin-wall housewares, and living-hinge boxes; mechanical verification is governed by ISO 178 for flexural modulus and ISO 75-2/B for deflection temperature under load.
Sheet extrusion for dairy tubs and bakery trays differs from cast film in that the melt passes through a slot die with a gap of 1.0–2.5 mm, a three-roll polishing stack at 55–80 °C, and a sheet haul-off with beta-gauge thickness scanning at 0.3–2.0 mm. The formulation for monolayer food-contact sheet uses 70–90 wt% virgin Marlex PP HC116FB and 10–30 wt% in-house thermoforming skeleton regrind, plus 2.0–4.0 wt% white or custom-colour masterbatch and 0.05–0.15 phr supplemental phenolic/phosphite stabilizer added on the virgin-feed side. Regrind above 30 wt% is not recommended for monolayer sheet intended for direct food contact unless a functional barrier layer is added, because repeated heat histories increase melt-flow drift, reduce sheet impact, and complicate good manufacturing practice traceability under EC 1935/2004 Article 3. Extrusion uses a 30:1 L/D single-screw extruder with a barrier screw and melt pump, barrel zone temperatures of 190–230 °C, die temperatures of 190–245 °C, and melt temperature of 220–250 °C. The sheet is thermoformed on a plug-assist pressure/vacuum former at a sheet surface temperature of 145–170 °C; mould temperatures are held at 20–60 °C and cooling time is 1.5–4 s for 0.8 mm wall sections. Food-contact compliance follows EC 1935/2004 Article 3 and FDA 21 CFR 177.1520; duplicate samples are tested under EN 1186-2:2002 for total immersion migration. Terminal products include margarine tubs, dairy creamer cups, cold-drink cups, deli containers, bakery trays, egg trays, and microwave-safe lids in applications where continuous service temperature does not exceed 90 °C; above this limit, dimensional distortion under load becomes measurable in HDT testing under ISO 75-2/B.
Vacuum metallised cast film made from Marlex PP HC116FB differs from standard cast polypropylene in that the polymer surface receives an aluminium layer of 30–60 nm at optical density 1.8–2.4; therefore erucamide and oleamide slip agents are excluded because their surface migration blooms to the surface and weakens metal adhesion. The formulation is 99.0–99.8 wt% HC116FB with 0.2–0.5 phr low-particle-size synthetic silica anti-block and 0.03–0.08 phr hindered phenolic antioxidant. Extrusion parameters parallel those of clear cast film: melt temperature 230–250 °C, chill-roll temperature 18–30 °C, die gap 0.6–0.8 mm, and line speed 180–260 m/min, but the web is corona-treated to 40–48 mN/m immediately before metallization rather than at lower surface energy. Surface energy decays under high humidity; production scheduling should avoid storage longer than 24 h at relative humidity above 80%. The compliance framework for food-contact metallised structures includes FDA 21 CFR 177.1520 for the polymer layer and EU Regulation (EU) No 10/2011 for migration; oxygen transmission is measured according to ASTM D3985-17 at 23 °C/0% RH after metallization, and aluminium-bond integrity is verified with tape-peel methods. Terminal constructions include metallised pouches for coffee, snack foods, confectionery, inner seal liners, decorative labels, and barrier lamination webs for dry products. Published oxygen transmission data for this specific HC116FB metallized configuration is limited; achievable performance is dependent on optical density, vacuum chamber pressure, and web tension rather than polymer grade alone.
Polypropylene cast film made from HC116FB is used as a backing web for stationery, masking, and box-sealing tapes. In this conversion route, melt temperature is held at 225–245 °C and film thickness ranges from 25 µm to 50 µm; the critical quality parameter is not drawdown but surface-energy retention after in-line corona treatment to 42–48 mN/m according to ASTM D2578-23. The formulation is 100 phr HC116FB, with no migratory amide slip; anti-block is optional at 0.2–0.5 phr, and antioxidant addition is 0.03–0.08 phr. When water-based acrylic pressure-sensitive adhesive is applied at 10–40 g/m², the treated surface is coated within 24 h; if storage exceeds this interval, re-corona treatment is required because surface energy can decay below acceptable anchorage levels. The reverse side is coated with a release formulation before slitting. Regulatory compliance includes REACH Regulation (EC) No 1907/2006 and EU 94/62/EC heavy-metal limits of 100 mg/kg; where tape is used in food-contact secondary packaging, additional end-use compliance is evaluated under the relevant national schemes. Adhesion performance is tested according to ASTM D3330/D3330M-02 for peel and ISO 29862:2007 for self-adhesive tape; the backing film itself is tested for tensile properties under ISO 527-3. Terminal articles include stationery tape, masking tape, unoriented polypropylene box-sealing film, decorative tape, and label carrier webs.
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MARLEX PP HC116FB is a propylene-ethylene impact copolymer supplied as pelletised feedstock for injection moulding, where a controlled balance of melt flow, stiffness, and low-temperature ductility is required. The grade is positioned between high-flow homopolymer grades and random copolymers in the manufacturer’s polypropylene portfolio. Its heterophasic microstructure consists of a polypropylene continuous phase and a dispersed ethylene-propylene rubber phase, which increases resistance to crack propagation at low temperatures while reducing tensile modulus relative to a 12 g/10 min homopolymer. Representative values from the technical data sheet include a melt flow rate of 11.6 g/10 min at 230 °C and 2.16 kg in accordance with ISO 1133-1:2022, density of 0.905 g/cm³ in accordance with ISO 1183-1:2019, tensile yield stress of 27 MPa at 50 mm/min in accordance with ISO 527-2:2012, flexural modulus of 1,450 MPa at 2 mm/min in accordance with ISO 178:2019, notched Charpy impact of 7 kJ/m² at 23 °C and 4 kJ/m² at −20 °C in accordance with ISO 179-1:2010, and heat deflection temperature of 92 °C under 0.45 MPa in accordance with ISO 75-2:2013. These data are lot-specific and subordinate to the certificate of analysis; incoming resin audits should include at least one melt-flow and one density determination per silo transfer.
Compared with a nucleated 12 g/10 min polypropylene homopolymer, HC116FB exhibits a lower flexural modulus and tensile yield stress because of the dispersed rubber phase, but a higher notched impact strength at 23 °C and −20 °C. The homopolymer retains a higher heat deflection temperature under 0.45 MPa, typically near 100 °C, while the impact copolymer falls to 92 °C. Random copolymers with comparable melt flow show better optical clarity and lower seal-initiation temperature, but their heat deflection temperature and long-term creep resistance are lower. The dispersed phase in HC116FB is not intended to provide clarity; moulded parts are generally translucent to opaque depending on pigment loading and cooling rate. The differentiation is not purely compositional: the additive package includes nucleating and stabilising components that alter crystallisation kinetics, with the practical result that shrinkage is more isotropic than a non-nucleated homopolymer, although less isotropic than a controlled-rheology random copolymer.
| Property | HC116FB | Nucleated homopolymer (12 g/10 min MFR) | Random copolymer (10 g/10 min MFR) |
|---|---|---|---|
| Melt flow rate at 230 °C/2.16 kg (ISO 1133-1:2022) | 11.6 g/10 min | 12 g/10 min | 10 g/10 min |
| Density (ISO 1183-1:2019) | 0.905 g/cm³ | 0.905 g/cm³ | 0.900 g/cm³ |
| Tensile yield stress (ISO 527-2:2012, 50 mm/min) | 27 MPa | 36 MPa | 29 MPa |
| Flexural modulus (ISO 178:2019, 2 mm/min) | 1,450 MPa | 1,800 MPa | 1,100 MPa |
| Notched Charpy impact at 23 °C (ISO 179-1:2010) | 7 kJ/m² | 2.5 kJ/m² | 8 kJ/m² |
| Notched Charpy impact at −20 °C (ISO 179-1:2010) | 4 kJ/m² | 1.5 kJ/m² | 3 kJ/m² |
| Heat deflection temperature at 0.45 MPa (ISO 75-2:2013) | 92 °C | 100 °C | 80 °C |
| Vicat softening temperature at 10 N (ISO 306:2022) | 150 °C | 155 °C | 140 °C |
During mould filling, the apparent viscosity of HC116FB at 230 °C and a shear rate of 1,000 s⁻¹ produces a spiral-flow length of approximately 450–550 mm at a wall thickness of 2.0 mm, depending on mould temperature and gate geometry. The transition from shear-thinning to shear-induced crystallisation is commonly observed at the upper end of the injection speed range when melt temperature falls below 220 °C; this can produce flow marks and gate blush. For masterbatch dilution, a co-rotating twin-screw extruder with 40:1 L/D and a side-stuffer is suitable; melt temperature should be maintained below 260 °C to prevent chain scission and shift in the molecular-weight distribution. Screw speed in the compounding extruder is typically limited to 300–500 min⁻¹ depending on screw diameter, because excessive specific energy input above 0.25 kWh/kg may degrade the rubber phase and reduce impact strength.
Thin-wall cavities below 1.2 mm impose a narrower processing window than thick-wall parts. On a servo-electric injection-moulding machine with closed-loop transfer, holding pressure should be applied at 5–10 mm before the screw reaches the cushion target; a cushion of 2–4 mm is necessary to maintain gate pressure. The melt temperature set point is 230–250 °C. Below 225 °C, the combination of high injection velocity and low mould temperature can cause delamination at the flow front; above 255 °C, visual gloss shifts and oxidative degradation volatiles appear. Mould temperature should be held at 30–50 °C, with cavity-to-cavity variation not exceeding ±5 °C. In multi-cavity tools, temperature imbalance of 10 °C between first and last cavity has been shown to create part-mass coefficients of variation above 2%, which is generally unacceptable for dimensional control. Injection speed should be profiled: a slow start of 30–60 mm/s for the first 10–15 mm of fill reduces jetting, followed by 120–200 mm/s for the main fill, then deceleration before transfer. Back pressure in the plastication phase is set at 0.5–1.5 MPa to avoid excessive screw recovery time without introducing unmelted pellets.
Hot-runner systems should be externally heated with separate manifold and nozzle zones; nozzle tip temperature is not to exceed 260 °C when residence time exceeds 5 min. Gate freeze-off studies should be performed by sealing the cavity at increments of 0.2 s; the gate-seal time at 2.0 mm wall thickness is usually 4–8 s depending on gate diameter. If the gate is not sealed before screw rotation, polymer can flow back from the cavity and create sink marks. Venting is critical at flow-front velocities above 300 mm/s; vent depth should not exceed 0.02 mm for polypropylene to avoid flash. In converter trials on a 6,000 kN hydraulic injection-moulding press with a 70 mm general-purpose screw, cavity-to-cavity mould temperature differences greater than 10 °C produced part-mass variation of 2.1% and measurable sink over gate bosses.
| Process variable | Starting set-point | Acceptable control band | Measurement/control method |
|---|---|---|---|
| Melt temperature at nozzle | 240 °C | 230–250 °C | Insertion thermocouple probe at nozzle |
| Mould surface temperature | 40 °C | 30–50 °C, cavity deviation ≤5 °C | Cycle-start thermal imaging |
| Injection speed, main fill | 150 mm/s | 120–200 mm/s for wall thickness 1.2–2.5 mm | Linear transducer on injection axis |
| Transfer position | 8 mm before cushion | 5–10 mm | Screw-position encoder |
| Holding pressure | 40 MPa | 35–50 MPa, gate-seal verified | Pressure transducer in nozzle or hot runner |
| Plasticating back pressure | 1.0 MPa | 0.5–1.5 MPa | Hydraulic pressure gauge |
| Screw speed | 100 min⁻¹ | 80–120 min⁻¹ | Tachometer |
| Desiccant dryer temperature | 80 °C | 75–85 °C; not above 100 °C | Air-on-air temperature controller; dew point ≤−30 °C |
Applications reported in technical trade literature include automotive battery housings, interior fascia retainers, appliance structural frames, industrial crates, and thin-wall food containers. The selection of HC116FB for these parts is justified when the component must pass drop impact after conditioning at −20 °C, needs a heat deflection temperature above 85 °C, and must be processed at high production rates without the orientation-induced warp of a high-flow homopolymer. The grade is not suitable for transparent parts, for load-bearing parts exposed to sustained stress above 10 MPa at 80 °C, or for continuous contact with organic solvents such as xylene or turpentine. Outdoor unpigmented service is governed by photochemical oxidation; if the part is to be exposed to UV, the compound should contain a hindered amine light stabiliser or carbon black, and performance should be verified by ISO 4892-2 cycle 1. Food-contact declarations, where required, must be traced to 21 CFR 177.1520 and EU 10/2011; specific migration testing is lot- and part-geometry dependent. REACH and RoHS compliance are assessed at the homogeneous-material level, with screening conducted by IEC 62321-3-1 for lead, cadmium, mercury, and hexavalent chromium. For applications outside the manufacturer’s listed uses, published data for this specific configuration is limited, and a pilot trial is required before series release.
Polypropylene is not hydrolytically degradable, but surface moisture on pellets acts as a volatile that disrupts the melt film in the feed zone and creates splay on the part surface. If pellets have been stored at relative humidity above 60% RH for more than 24 h, pre-drying in a desiccant hopper dryer at 80 °C for 2–4 h is recommended. Drying beyond 4 h at 80 °C does not raise viscosity significantly, but prolonged exposure above 100 °C can oxidise the stabiliser package and shift the melt flow rate by more than 0.2 g/10 min. A lot with a melt-flow increase of 10% relative to its certificate value should be segregated and evaluated for melt-pressure stability on the processing line. The feed throat should remain water-cooled to 40 °C; if feed-throat temperature exceeds 60 °C, pellet bridging may occur and the screw will starve, producing short shots and melt-temperature fluctuation. The grade should be stored away from strong oxidising agents and direct sunlight; open bags should be consumed within 8 h in humid environments to avoid surface moisture pickup.
