| HS Code | 974161 |
| Material | Polypropylene Homopolymer |
| Form | Pellets |
| Melt Flow Rate | 3.0 g/10 min (230°C, 2.16 kg) |
| Density | 0.900 g/cm³ |
| Tensile Strength At Yield | 34 MPa |
| Elongation At Yield | 10% |
| Flexural Modulus | 1300 MPa |
| Izod Impact Strength Notched At 23 C | 3.5 kJ/m² |
| Rockwell Hardness | R-95 |
| Heat Deflection Temperature At 0 45 Mpa | 100°C |
| Vicat Softening Temperature | 155°C |
| Melting Point | 165°C |
As an accredited REPOL PP Homopolymer H030SG factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | REPOL PP Homopolymer H030SG is packaged in 25 kg multi-walled paper bags with a polyethylene liner, palletized and stretch-wrapped for protection. |
| Container Loading (20′ FCL) | 20′ FCL loading of REPOL PP Homopolymer H030SG, packed in PP woven bags on pallets, net weight approximately 20 metric tons. |
| Shipping | REPOL PP Homopolymer H030SG is shipped as non-hazardous polypropylene pellets in clean, dry woven or paper bags, or bulk containers. Store away from moisture, heat, and direct sunlight. Avoid dust accumulation and use proper handling equipment. Transport in covered, dry vehicles to prevent contamination and preserve product quality. |
| Storage | Store REPOL PP Homopolymer H030SG in a cool, dry, well-ventilated area, protected from direct sunlight, moisture, and heat sources. Keep containers tightly sealed to prevent contamination and humidity absorption. Avoid open flames and static ignition. Maintain indoor storage away from oxidizing agents. Proper conditions ensure stable processing and prevent degradation or property loss. |
| Shelf Life | Store in a cool, dry place, protected from sunlight and heat. Shelf life is typically 12 months from delivery. |
Injection moulding operations converting REPOL PP Homopolymer H030SG into reusable logistics containers must anticipate a narrower processing window than high-flow impact copolymers. The grade’s melt flow rate of 3.0 g/10 min, determined at 230°C/2.16 kg under ISO 1133-1:2022, places it at the low-flow end of the homopolymer range, so cold-runner tooling must be balanced within ±5% volumetric fill to prevent short shot migration. A nominal wall thickness of 2.5–3.5 mm is typical for a 600×400 mm crate; wall sections below 2.2 mm tend to freeze before packing is complete. The melt temperature is maintained at 220–240°C and the mould surface at 20–40°C. For reusable pallets intended for racking, the complete article is tested to ISO 8611-1:2021, because the resin alone cannot certify a load rating. Weathering resistance is achieved with 0.2–0.4 wt% hindered amine light stabiliser plus 1.0–2.0 wt% carbon black masterbatch; exact dosing must be adjusted to pigment carrier and customer colour, and accelerated exposure is conducted under ISO 4892-2. Finished crates are conditioned at 23±2°C and 50±5% relative humidity per ISO 291 before dimensional audit. H030SG in this segment is restricted to service conditions where low-temperature drop impact is not specified; homopolymer PP-H is not an impact-copolymer substitute.
Automotive battery containers present an asymmetric fill condition: perimeter walls may be 3.5–5.0 mm thick while bottom partitions are 1.8–2.5 mm thick. Because H030SG has a low melt flow rate under ISO 1133-1:2022, the nozzle melt temperature is held at 230±5°C, and the screw is operated below 0.25 m/s peripheral speed to avoid frictional overheating. Barrel setpoints from feed to nozzle are 190°C, 210°C, 220°C, 230°C, and the mould is cooled to 30–40°C to reduce frozen-in stress. Packing is divided into two stages: 60–75% of peak cavity pressure for 6–8 s, followed by 25–35% for 5–7 s, to allow gate freeze after the thick sections are fully packed. Carbon black masterbatch at 1.5–2.5 wt% is used for opacity and UV screening, not for acid resistance; the moulder must measure notched Izod impact under ISO 180/A and tensile yield stress under ISO 527-2 after pigment dispersion, because poor dispersion at weld lines can reduce local strength. For lead-acid battery containers, the finished part is exposed to 30 wt% sulphuric acid according to an OEM protocol such as SAE J537. Published data for this specific H030SG battery-container configuration is limited, so qualification must include dimensional stability after acid ageing and burst-pressure testing of the sealed container.
| Assessment area | Standard / regulation | Boundary for H030SG |
|---|---|---|
| Melt flow rate | ISO 1133-1:2022 | 3.0 g/10 min at 230°C/2.16 kg |
| Density | ISO 1183-1:2019 | 0.90–0.91 g/cm³ |
| Tensile test | ISO 527-2 | Lot certificate required; unmodified PP-H of this flow class typically 30–38 MPa at yield |
| Flexural modulus | ISO 178 | Lot certificate required; typical class range 1400–1600 MPa |
| Food contact | EU 10/2011; FDA 21 CFR 177.1520 | Only with compliant pigment/additive package; migration testing is design-specific |
| Heavy metals | RoHS Directive 2011/65/EU Annex II | Base polymer not expected to exceed limits; colourants must be checked |
| Weathering | ISO 4892-2 | Unmodified PP-H degrades within 300–500 h; UV package required beyond that exposure |
| Flammability | UL 94 HB | Unmodified PP-H normally HB at 3.0 mm; colourants and wall thickness can alter classification |
PP-H appliance subassemblies are specified when the part must hold screw boss retention and clearance across repeated cycles from −10°C to 60°C. The low-flow grade requires a generous gate at the boss; edge gates below 1.2 mm diameter can freeze early and leave sink marks on the boss face. White parts are produced with 2.0–3.0 wt% titanium dioxide masterbatch, and the moulder must re-validate cooling time after colour change because TiO₂ changes thermal diffusivity. A nucleating agent at 0.1–0.3 wt% may be added to narrow differential shrinkage, but the effect must be measured on 60×60×2 mm plaques under ISO 294-4. Structural bosses are designed with an outer diameter of 2.5–2.8 times the nominal wall and a hole-to-outer-diameter ratio below 0.5 to avoid creep cracking. The finished housing is checked for creepage and clearance under IEC 60335-1 and the applicable appliance part standard such as IEC 60335-2-24 for refrigerating appliances. Unmodified H030SG is not suitable for parts exposed to repeated impact below 0°C; an impact copolymer or elastomer-modified grade should be evaluated if that requirement appears in the drawing.
Chemical pails and screw-thread closures made from REPOL PP Homopolymer H030SG are qualified for aggressive liquids only after packaging certification. The MFR of 3.0 g/10 min is not intended for 1.0 mm thin-wall containers, but supports 1.8–2.5 mm walls where stack compression strength is specified. A diaphragm gate or dual submarine gate layout is used to prevent weldline leakage across the bottom chime. The polymer’s non-polar backbone provides broad resistance to 10% acetic acid, 30% sulphuric acid, and 10% sodium hydroxide at 23°C; specific chemical soak testing remains mandatory for each packaging code. Dangerous goods packaging is certified as a complete pail-lid assembly, not by resin grade alone. Food-contact pails require that the base resin meets FDA 21 CFR 177.1520 and EU 10/2011, and that antistatic or colour masterbatches at 1.0–2.0 wt% are covered by the same declaration. If the pail is used above 40°C, specific migration testing in the intended food simulant is required. H030SG processed at 220–235°C into a 3.0 mm wall pail normally requires no pre-drying unless pellets have been stored at relative humidity above 60%; surface condensation is removed at 80°C for 2 h.
Structural seat shells moulded from H030SG use a wall thickness of 3.5–4.5 mm with a rib-to-wall ratio of 0.55–0.65 to avoid sink marks. The unfilled flexural modulus of this low-flow PP-H class lies in the range 1400–1600 MPa when tested under ISO 178, so load-bearing section modulus is generated mainly by geometry. A 450 t injection moulding machine with a 20:1 to 24:1 L/D screw is adequate for a projected area below 1200 cm² when cavity pressure remains near 35 MPa. Melt temperature is held at 220–240°C, and the tool at 30–50°C to balance gloss and productivity. For coloured shells, 2.0 wt% custom colour masterbatch is added; for outdoor furniture, 0.3–0.5 wt% HALS plus 1.0–2.0 wt% carbon black masterbatch improves UV retention when tested under ISO 4892-2. European seating strength and durability are assessed under EN 12520 and EN 1728; the resin reaches the standard only when metal insert connections and rib root radii are designed to distribute stress. Low-temperature impact resistance is a known limitation of PP-H; if the furniture specification includes a drop impact test at −20°C, an impact copolymer or compounded elastomer system must replace H030SG.
Injection moulded filter plates and valve bodies made from this grade exploit the non-polar backbone’s resistance to aqueous acid and alkali streams. Because sections are thick—often 8–15 mm—the melt is delivered at 235–245°C and the mould is kept at 35–50°C to delay freeze-off. The screw should not be operated below 0.15 m/s peripheral speed in this application, because slow plasticating of a 3.0 g/10 min material can extend residence time and initiate oxidative chain scission. A first-stage holding pressure of 50–70 MPa is applied for 10–15 s, followed by a second-stage hold at 30–40 MPa for 8–12 s, to compensate for volumetric shrinkage in the centre of the thick section. Post-mould machining is used to achieve a flatness tolerance of 0.05 mm/100 mm on the sealing face; this tolerance is not guaranteed by the resin system alone. Chemical resistance of the final part is tested by immersion in the service fluid at the maximum operating temperature; for example, 10% sodium hydroxide at 60°C for 7 days may be used as an internal screening method, but the actual protocol is set by the filtration equipment manufacturer. H030SG is unsuitable for strong oxidising acids and aromatic solvents; those fluids require a different polymer or fluoropolymer liner.
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REPOL PP Homopolymer H030SG is an injection-moulding-grade isotactic polypropylene homopolymer produced by Reliance Industries Limited. The grade designation identifies a controlled-flow product with a nominal melt flow rate of 30 g/10 min when tested according to ISO 1133-1:2022 at 230°C under a load of 2.16 kg. The pellet feedstock contains a processing stabiliser package and has a typical density of 0.90 g/cm³ under ISO 1183-1:2022. The material is specified for high-speed injection moulding of thin-wall packaging, closures, housewares, and appliance components where short fill times and dimensional reproducibility are primary requirements. Because the polymer is a homopolymer, its tensile stiffness and heat deflection temperature exceed those of heterophasic impact copolymers of similar melt flow, but its notched impact resistance below 0°C is lower. Published data for specific configurations such as hot-fill above 100°C or microwave reheating is limited and must be generated by the converter.
No routine pre-drying is required when bags are stored below 60% relative humidity and opened within 24 h. Cold outdoor storage can generate surface condensation that raises pellet moisture above 0.05 wt%; under this condition, a desiccant hopper dryer set at 70°C for 2 h is used before feeding. Melt moisture above 0.1 wt% has been observed to produce splay and surface streaks in fast-cycle closure moulding. The homopolymer backbone has negligible comonomer content, which contributes to higher crystallinity and lower impact absorption than impact copolymer grades. The controlled-flow molecular architecture narrows the molecular weight distribution relative to low-flow homopolymers, reducing die swell and improving surface texture replication, but also reducing melt elasticity and increasing jetting tendency in thick sections if injection speed is too low.
Field data from 80–120 tonne toggle-clamp injection moulding machines with general-purpose screws of 20:1 to 22:1 L/D ratio indicate stable processing at melt temperatures from 210°C to 240°C. Mould temperatures for thin-wall food containers are maintained between 15°C and 40°C; the upper portion of this band reduces frozen-in orientation in 0.8–1.2 mm walls but extends cycle time by approximately 5–10 s in hot-tip gated closures. Back pressure between 0.5 MPa and 1.0 MPa is sufficient for uniform colour concentrate dispersion, while back pressure above 1.5 MPa can introduce shear heating and lower viscosity to the point of flash in multi-cavity tools. Screw decompression of 2–5 mm after recovery limits nozzle drool. Injection velocity should be set to achieve a fill time of 0.5–1.5 s; velocities above 200 mm/s have been associated with gate blush and increased pressure drop across restricted gate lands in production-scale closure tools.
Plasticising time must be kept below the cooling time for thin-wall parts. If screw recovery exceeds cooling time, melt temperature fluctuation above ±3°C can appear across the shot and produce inconsistent cavity pressure. A reverse barrel-temperature profile of rear zone 220°C, centre zone 230°C, front zone 210°C, and nozzle 220°C is used on some production lines to limit shear overheating in high-compression screws. The apparent viscosity under injection-moulding shear rates places H030SG between lower-flow general-purpose homopolymers and very high-flow thin-wall grades. Capillary rheometry at 230°C shows pseudoplastic behaviour that permits flow-length-to-wall-thickness ratios above 200:1 in unheated cold-runner tools. That flow length is obtained only when parting-line vents of 0.02–0.03 mm are present at the end of fill and when the melt cushion is maintained at 3–6 mm. Inadequate venting produces short shots and gas burn in the last-fill regions, particularly in tamper-evident closure skirts with fine ribbing.
Typical values from the manufacturer's technical bulletin, obtained on injection-moulded specimens conditioned at 23°C and 50% relative humidity for 48 h, are listed below. Tensile properties follow ISO 527-2:2012 using 1A specimens, flexural modulus follows ISO 178:2019 at 2 mm/min, and heat deflection temperature is measured under 0.45 MPa load according to ISO 75-2:2013 method B.
| Property | Test method | Typical value | Unit |
|---|---|---|---|
| Density | ISO 1183-1:2022 | 0.90 | g/cm³ |
| Melt flow rate at 230°C/2.16 kg | ISO 1133-1:2022 | 30 | g/10 min |
| Tensile stress at yield | ISO 527-2:2012 | 34 | MPa |
| Tensile elongation at yield | ISO 527-2:2012 | 9 | % |
| Flexural modulus | ISO 178:2019 | 1550 | MPa |
| Notched Izod impact at 23°C | ISO 180:2019/A | 2.5 | kJ/m² |
| Heat deflection temperature at 0.45 MPa | ISO 75-2:2013 B | 95 | °C |
| Vicat softening temperature 10 N | ISO 306:2022 A50 | 154 | °C |
| Mould shrinkage, 2 mm plaque | ISO 294-4:2018 | 1.2–1.6 | % |
The notched Izod value of 2.5 kJ/m² at 23°C defines a key operational boundary for H030SG in snap-fit assemblies and cold-chain distribution. Unlike impact copolymers, the homopolymer can transition to brittle failure at 0°C when sharp notches or weld lines are present; freezer-storage closures therefore require radiused corners or an impact-modified grade. In non-notched configurations the material retains ductile behaviour, but published data for specific notch geometry and gate-induced weld line strength is limited. The heat deflection temperature under 0.45 MPa supports short-term hot-water contact in housewares; continuous load-bearing at temperatures above 85°C is not recommended without creep validation.
At comparable melt flow, a heterophasic impact copolymer typically exhibits flexural modulus in the range of 1000–1300 MPa and notched Izod impact strength in the range of 6–12 kJ/m² at 23°C. H030SG therefore provides a flexural modulus advantage of approximately 25–40% and a notched impact penalty of approximately 70–80% relative to those copolymer grades. This trade-off positions H030SG where stiffness, heat resistance, and fast filling dominate, and excludes it from low-temperature snap-fit assemblies, luggage shells, and automotive energy-management parts unless the component design includes substantial radii and reduced stress concentration.
Compared with clarified polypropylene random copolymers containing ethylene comonomer in the range of 1.5–3.5 wt%, H030SG exhibits higher flexural modulus and higher heat deflection temperature but lower transparency. A 1 mm injection-moulded H030SG plaque typically exceeds 30% haze, whereas clarified random copolymers can fall below 10% haze under ASTM D1003-21. This distinction excludes H030SG from see-through storage containers and clear overcaps but does not constrain its use in pigmented packaging, closures, or appliance parts.
Substitution of a 10–12 g/10 min homopolymer with H030SG in an existing thin-wall mould typically lowers melt pressure at the machine nozzle, shortens fill time, and permits a reduced cushion. However, the lower viscosity may increase flash tendency in tools with worn parting lines or insufficient clamp force; the same tool may require a clamp force increase of 10–15% at identical peak injection pressure because the melt reaches the cavity end earlier and transmits pressure more effectively. Gate freeze time is prolonged slightly, so hold-pressure time should be extended by 0.3–0.8 s to control sink marks over rib intersections. Shot-to-shot variation in cushion position has been observed to produce visible gloss variation in 0.8 mm wall packaging when the cushion falls below 2 mm; maintaining a cushion of 3–6 mm stabilises filling.
In flat thin-wall containers, H030SG develops anisotropic shrinkage under high orientation. Longitudinal shrinkage along flow can be 0.4–0.6% and transverse shrinkage 0.8–1.2%, depending on wall thickness, gate type, and cooling rate. This anisotropy increases with fast injection speeds and low mould temperatures. Rectangular container warpage is controlled by multiple end gates rather than a single central sprue, and by limiting differential cooling between cavity and core to less than 10°C. Post-mould dimensional change stabilises within 24–48 h at ambient storage.
Addition of colour masterbatch above 4 wt% can lower melt flow rate by approximately 2–5% and increase warpage in thin-wall parts; a converter must recheck lot melt flow rate before releasing the process. External lubricants and peroxide-containing additive batches should be evaluated separately because uncontrolled peroxide exposure can shift melt flow rate above 35 g/10 min and reduce notched Izod impact. Hot-runner manifold temperatures should not exceed 240°C for residence times above 2 min to avoid chain scission, gel formation, and yellowing.
The unmodified base resin is formulated to meet food-contact requirements under FDA 21 CFR 177.1520 for olefin polymers and Commission Regulation (EU) No 10/2011, provided the finished article meets the overall migration limit of 10 mg/dm² under the specified food-simulant test conditions. Compliance is valid only for the unpigmented virgin grade; colour masterbatch, nucleating agents, clarifiers, or post-consumer recycled content must be assessed separately. Under REACH Regulation (EC) No 1907/2006, the polymer is exempt from registration while monomer and additive components require registered substances. The grade does not intentionally contain substances of very high concern above 0.1% w/w. The RoHS Directive 2011/65/EU applies to electrical and electronic equipment applications; unfilled polypropylene homopolymer is not expected to contain lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above the maximum concentration values.
| Standard | Scope | Boundary condition |
|---|---|---|
| FDA 21 CFR 177.1520 | Olefin polymers for food contact | Unpigmented base resin; end-use migration testing |
| EU 10/2011 | Plastic materials and articles intended for food contact | Overall migration 10 mg/dm²; food simulant testing |
| REACH 1907/2006 | Registration, evaluation, authorisation of chemicals | Polymer exempt; monomer and additive registration required |
| RoHS 2011/65/EU | Hazardous substance restrictions in EEE | Not expected above maximum concentration values |
Converter-specific documentation should include lot-level melt flow rate measured by ISO 1133-1:2022, ash content below 200 ppm by ISO 3451-1:2008, and pellet size distribution for consistent screw feeding. Colour stability during processing is maintained up to 250°C for residence times below 5 minutes; extended hold times above 10 minutes in a blocked nozzle or hot runner cause yellowing and a drift in melt viscosity. For fatty-food contact under EU 10/2011, hot-fill conditions above 70°C may require specific migration testing for additives; no published data for H030SG in this specific configuration is available.
Applications observed on production lines include 0.8–1.2 mm wall dairy containers, disposable cups, and tamper-evident closures. In multi-cavity hot-runner dairy container tools, the grade has been processed at cycle times of 4–6 s when mould temperatures are kept at 10–15°C and water-flow circuits provide turbulent heat removal. In closure production, torque retention after induction sealing is governed by the closure design and liner system rather than by the polypropylene homopolymer alone. Published data for this specific configuration is limited; converter trials are required to establish sealing force and removal torque before commercialisation.
