| HS Code | 803119 |
| Melt Flow Index | 34 g/10 min (230°C, 2.16 kg) |
| Density | 0.905 g/cm³ |
| Tensile Strength At Yield | 35 MPa |
| Elongation At Yield | 10% |
| Flexural Modulus | 1450 MPa |
| Izod Impact Strength Notched 23 C | 30 J/m |
| Heat Deflection Temperature 0 45 Mpa | 110 °C |
| Heat Deflection Temperature 1 82 Mpa | 65 °C |
| Vicat Softening Point | 155 °C |
| Rockwell Hardness | R105 |
As an accredited Repol PP H034SG factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Repol PP H034SG polypropylene is packaged in 25 kg multi-wall paper bags, heat-sealed and palletized for safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL container loading for Repol PP H034SG: polypropylene pellets packed in 25kg bags, palletised, shrink-wrapped, and securely stowed. |
| Shipping | Repol PP H034SG is a polypropylene homopolymer resin, shipped as non-dangerous goods. It requires no UN number or hazard classification. Transport in clean, dry containers or sealed bags, protected from moisture, heat, and sunlight. Handle to avoid dust dispersion and store away from oxidizing agents and ignition sources. |
| Storage | Store Repol PP H034SG in a clean, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Maintain moderate temperatures and avoid exposure to strong oxidizers. Proper storage preserves material quality, prevents degradation, and ensures safe handling during processing. |
| Shelf Life | Store in original packaging in a cool, dry place away from sunlight. Shelf life is typically 12 months from date of manufacture. |
Repol PP H034SG is a polypropylene homopolymer with a nominal melt flow rate of 3.4 g/10 min at 230 °C under 2.16 kg load as determined by ISO 1133-1:2022, with a density of approximately 0.90 g/cm³ under ISO 1183-1:2019. The application coverage below is limited to converting sectors in which the grade is used as a polymer feedstock: biaxially oriented film, raffia tape and woven fabric, heavy-section injection moulding, monofilament, oriented strapping, and thermoformable sheet. Each sector-specific note includes the relevant regulatory boundary, additive loading range, production sequence, and finished article types; stated ranges are industrial operating windows rather than inventory specifications.
In transparent high-speed biaxially oriented polypropylene packaging lines running at winding speeds from 250 m/min to 380 m/min, Repol PP H034SG functions as the core-layer feedstock because its nominal 3.4 g/10 min melt flow rate, combined with homopolymer chain linearity, supports stable machine-direction and transverse-direction orientation without excessive melt sag in the tenter oven. The food-contact boundary for the resulting film is defined by FDA 21 CFR 177.1520(c), which covers olefin polymers used as indirect additives, and by EU Regulation 10/2011, under which Article 12 imposes an overall migration limit of 10 mg/dm² in assigned food simulants. Core-layer additive loadings on tenter-frame lines typically remain within 90–96 wt% H034SG, with synthetic silica anti-block at 0.05–0.20 wt%, erucamide slip at 0.05–0.10 wt%, and phenolic or phosphate antioxidant masterbatch at 0.05–0.15 wt%; skin layers are coextruded propylene-ethylene copolymers or terpolymers at 2–5 wt% per side to lower seal initiation temperature. The extrusion section uses a single-screw extruder with L/D 30:1 to 33:1, barrel set-points between 230 °C and 250 °C, and a die gap of 2.0–2.8 mm. The cast sheet is quenched on a chill roll held at 30–40 °C, then drawn in machine direction at 4.8–5.2:1 at 120–140 °C and transversely oriented at 7–9:1 in a tenter oven with zone temperatures from 150 °C to 165 °C. The tenter zone-to-zone variation must be kept within ±5 °C; transverse stretch segments above 168 °C produce gauge bands and reduced heat-seal strength through surface degradation, while zones below 148 °C prevent complete transverse orientation and leave visible stress bands. Corona treatment is applied to one or both surfaces at 38–44 mN/m using ASTM D2578 wetting tension measurement. Terminal products from this route include metallised snack-food wrappers, pressure-sensitive tape base film, adhesive label facestocks, and overwrap film for confectionery and cigarette bundles, with residual shrinkage usually specified below 2.0% at 120 °C after 15 min.
| Core-layer additive | Typical loading | Function | Test reference |
|---|---|---|---|
| Synthetic silica anti-block | 0.05–0.20 wt% | Separates film surfaces on winder | ISO 14782 |
| Erucamide slip | 0.05–0.10 wt% | Reduces coefficient of friction | ASTM D1894 |
| Phenolic/phosphate antioxidant | 0.05–0.15 wt% | Prevents oxidative degradation | ISO 1133-1:2022 |
| Nucleating agent | 0.05–0.15 wt% | Controls spherulite size and haze | ASTM D1003 |
Raffia tape and woven sack production from Repol PP H034SG is controlled by the competing requirements of high draw ratio and resistance to longitudinal splitting. The tape formulation uses the homopolymer as the base resin at 82–95 wt%, calcium carbonate masterbatch at 5–15 wt% where opacity and cost reduction are required, pigment masterbatch at 1–3 wt%, and UV stabilizer masterbatch at 0.2–0.5 wt% for sacks designated for outdoor storage. Compliance for flexible intermediate bulk containers is anchored to ISO 21898:2004 for non-dangerous goods FIBCs and UN 13H2 performance tests for dangerous-goods FIBC assemblies when the woven fabric is coated and fitted with a liner; food-contact woven sacks cite FDA 21 CFR 177.1520 for the olefin polymer resin and EU Regulation 10/2011 for migration. The extrusion line commonly uses a single-screw extruder with L/D 30:1, barrel temperatures from 200 °C to 240 °C, and a slit die feeding a water quench bath at 30–45 °C. Water-bath temperature variation should remain within ±3 °C because uneven quenching causes tape curvature and inconsistent stretch response. The quenched sheet is slit into tapes of 2.0–6.0 mm width and stretched in a hot-air oven at 120–150 °C at draw ratios between 5:1 and 8:1. Drawn tapes are annealed in a second heated zone at 80–100 °C to reduce shrinkage and then wound onto warp beams for circular looms. Terminal products include uncoated and laminated woven sacks for cement, fertiliser, grain, and polymer granules, as well as FIBC panels and liner fabrics. Final fabric tensile strength is usually specified under ISO 13934-1:2013, with values dependent on tape denier, fabric mesh count, and draw ratio. The critical process limit is reached when calcium carbonate loading exceeds 15 wt% or draw ratio exceeds 8:1; under these conditions the oriented homopolymer tape fibrillates in the loom, producing broken ends and reduced drop-test performance.
Thick-section industrial crates and houseware components moulded from Repol PP H034SG are processed at melt temperatures between 220 °C and 250 °C, but the grade’s 3.4 g/10 min melt flow rate restricts economic filling to wall-stock thicknesses above 2.5 mm and gates of at least 1.5 mm. Neat H034SG moulded samples typically show a flexural modulus near 1500 MPa under ISO 178:2019, which supports rigid load-bearing parts but limits thin-wall flow length. The compounding window for non-food rigid articles uses 96–99 wt% base resin, antioxidant masterbatch at 0.05–0.15 wt%, nucleating agent at 0.05–0.20 wt% to shorten cycle time, and pigment masterbatch at 0.5–2.0 wt%. For crates requiring sub-zero impact resistance, an ethylene-propylene copolymer impact modifier is added at 5–10 wt%, after which the compound is tested under ISO 180:2019 rather than as a neat homopolymer. The regulatory envelope for housewares sold into European and North American markets includes REACH (EC) No 1907/2006 Annex XVII, RoHS Directive 2011/65/EU Annex II with lead restricted to a maximum of 0.1 wt% and cadmium to 0.01 wt%, and FDA 21 CFR 177.1520(c) where repeat-use food contact is intended. Injection moulding uses a reciprocating screw with L/D 20:1 to 24:1, compression ratio 2.5:1 to 3.0:1, back pressure 0.5–1.0 MPa, injection pressure 80–120 MPa, and holding pressure 60–80 MPa. Mould temperatures are held at 20–60 °C, with the upper end improving surface replication but increasing cooling time; melt cushion is maintained at 3–5 mm and decompression is applied before screw retraction to prevent drool at the nozzle. Terminal articles include returnable transport crates, freezer-safe storage boxes, houseware pails, and furniture support bases. Food-contact articles require extraction testing under EU Regulation 10/2011 food simulants A, B, and D2 before commercial release.
Because monofilament orientation demands a broad plasticating temperature window before water quenching, Repol PP H034SG is deployed in twisted rope, agricultural twine, and brush filament lines where the polymer must survive draw ratios between 6:1 and 9:1. The formulation register is tighter than raffia: 89–98 wt% H034SG, UV stabilizer masterbatch at 0.3–0.8 wt% for outdoor exposure, colour masterbatch at 1–3 wt%, and processing aid at 0.05–0.15 wt%. Filler is excluded above 2 wt% because dispersed mineral particles initiate micro-crazing during hot-water orientation and reduce knot strength. The process sequence consists of single-screw extrusion through a multi-orifice die with hole diameters from 1.0 mm to 2.0 mm at melt temperatures 220–245 °C, water-bath quenching at 30–45 °C, hot-water or hot-air stretching at 95–120 °C, annealing at 100–130 °C, and precision cross-winding. The relevant yarn tensile test is ASTM D2256/D2256M-21; assembled rope constructions are tested under ISO 2307:2019. For food-processing brush filaments, the olefin feedstock is evaluated under FDA 21 CFR 177.1520. Terminal article types include baler twine, agro shade-net monofilaments, industrial brush bristles, rope yarns, and synthetic broom hair. Outdoor colour fastness and UV resistance are validated by ISO 105-B02:2014 exposure testing. Published data for the exact creep-rupture behaviour of H034SG monofilament in continuous agricultural loading is limited; converters supplying long-term load-bearing applications therefore perform finished-product tests on rope assemblies rather than relying solely on resin datasheet values.
Oriented polypropylene strapping produced from Repol PP H034SG is a low-elongation, high-tension packaging product in which longitudinal orientation must overcome the natural notch sensitivity of homopolymer polypropylene. The strapping compound uses 94–99 wt% base resin, antioxidant masterbatch at 0.1–0.3 wt%, colour masterbatch at 1–2 wt%, and a non-slip surface concentrate at 0.5–2.0 wt%. Filler addition is restricted below 3 wt% because mineral particulates reduce transverse split resistance during automatic strapping machine cycling. Compliance is anchored to ASTM D3951-18 for commercial packaging strapping, which sets requirements for break strength, elongation, retained tension, and edge quality; strapping entering direct food-contact transit packaging also falls under FDA 21 CFR 177.1520. Extrusion runs through a slit die at melt temperatures 220–250 °C, followed by water quench at 25–40 °C, orientation at 130–160 °C with draw ratios between 6:1 and 10:1, surface embossing, and tension-controlled winding. The orientation oven must be held within ±5 °C of set point; broader variation produces periodic low-tension bands that are rejected by automatic strapping heads. Terminal products cover light-duty box strapping of 5–12 mm width, heavy-duty pallet strapping of 12–19 mm width, and printed strapping for logistics branding. Automatic strapping heads generally require elongation at break below 20% and retained tension above 80% after 24 h, values that are attainable only when the draw ratio, annealing temperature, and winding tension are managed as a single control loop.
When Repol PP H034SG is extruded into sheet for subsequent thermoforming, the converter accepts a narrower processing window than would be obtained from a higher-melt-flow thermoforming grade, because the 3.4 g/10 min melt flow requires elevated melt temperature yet avoids excessive sag during roll-stack polishing. The sheet formulation uses 90–97 wt% H034SG, antistatic masterbatch at 0.1–0.3 wt%, nucleating agent at 0.05–0.25 wt%, and pigment masterbatch at 0.5–2.0 wt%. For low-temperature clamshell applications, an impact modifier is introduced at 4–8 wt%, moving the notched impact performance toward the values required by ISO 180:2019 for frozen-food distribution. The regulatory envelope for food trays and containers is set by EU Regulation 10/2011 with an overall migration limit of 10 mg/dm² and by FDA 21 CFR 177.1520; non-food stationery and industrial trays are evaluated under REACH (EC) No 1907/2006 and RoHS Directive 2011/65/EU. Extrusion is performed on a single-screw line with L/D 30:1 to 36:1, a barrier screw, screen pack of 60–100 mesh, and a three-roll polishing stack with roll temperatures 60–90 °C, producing sheet thicknesses from 0.3 mm to 2.0 mm. Thermoforming follows on shuttle or inline machines at sheet-surface temperatures 160–180 °C, with plug assist used for depth-to-width ratios above 0.5 and mould temperatures between 20 °C and 60 °C. Terminal products include refrigerated dairy trays, bakery clamshells, industrial packaging trays, stationery folder covers, and reusable transit trays. Published data for H034SG-specific thermoforming wall-thickness distribution on deep-draw tools is limited; tooling trials with grid-line strain analysis are recommended before production release.
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| Property | Typical value | Test method |
|---|---|---|
| Melt mass-flow rate | 3.4 g/10 min | ISO 1133-1:2022 |
| Density | 0.90 g/cm³ | ISO 1183-1:2019 |
| Tensile yield strength | 34 MPa | ISO 527-2:2012 |
| Strain at yield | 10% to 12% | ISO 527-2:2012 |
| Flexural modulus | 1450 MPa | ISO 178:2019 |
| Notched Izod impact at 23°C | 3.0 kJ/m² | ISO 180:2019 |
| Vicat softening temperature | 154°C | ISO 306:2022 |
| Heat deflection temperature at 0.45 MPa | 105°C | ISO 75-2:2013 |
For H034SG, barrel set points are normally arranged from 200°C at the feed throat to 240°C at the nozzle, with actual melt temperatures maintained between 220°C and 250°C. The melt-temperature window is not indefinite. Below 220°C, viscosity rises rapidly, injection-pressure demand increases, and molecular interdiffusion at weld lines becomes insufficient. Above 260°C, thermo-oxidative degradation of the polypropylene backbone can occur during extended residence, producing yellowing, volatile degradation products, and measurable loss of tensile elongation. Cumulative residence time above 260°C should be kept below 5 min in the barrel and hot runner.
Hold pressure is typically applied at 50% to 70% of the peak injection pressure after switchover at 95% to 98% of filled volume. For sections thicker than 3 mm, hold times of 8 s to 12 s per millimetre of wall thickness compensate for specific volume change during crystallisation. Insufficient hold pressure produces sink marks and internal voids; excessive hold pressure beyond 80 MPa on small gates may induce gate stress and part sticking. On hydraulic machines, a melt cushion of 3 mm to 5 mm is recommended because a zero cushion removes the pressure buffer and raises shot-weight variability.
Weld-line tensile strength in polypropylene homopolymers is strongly sensitive to melt temperature below 220°C. At lower flow-front temperatures, incomplete chain re-entanglement can reduce weld-line strength to less than 60% of the unwelded tensile value. Mould temperatures of at least 40°C improve weld-line healing. Mould release sprays or external lubricants deposited on the cavity can severely weaken weld lines and should be avoided.
Mould temperatures below 20°C produce high frozen-layer thickness, jetting, and visible flow lines, while mould temperatures above 60°C increase cooling time without proportional improvement in stiffness. For highly polished surfaces, mould temperatures of 40°C to 50°C are used to improve gloss and reduce flow marks.
Living-hinge designs require particular attention to melt-flow orientation and gate location. Hinge thickness is generally kept between 0.25 mm and 0.50 mm. Below 0.25 mm, the frozen layer can occupy the entire cross-section and destroy orientation; above 0.50 mm, the hinge region retains an unoriented core that fails by yielding during flexure. The gate should be positioned so that melt crosses the hinge axis perpendicular to the hinge line, aligning molecular orientation across the hinge. Production experience with homopolymer PP indicates that hinges moulded at melt temperatures below 210°C whiten prematurely and often fail before 1000 flexural cycles. Moulding at 230°C to 250°C with adequate orientation generally extends flexural endurance beyond 10⁴ cycles. Published data for H034SG-specific hinge endurance is limited; a prototype flex test on the actual moulded geometry is therefore recommended.Shrinkage of H034SG follows general homopolymer polypropylene behaviour. In the flow direction, linear mould shrinkage is generally 1.2% to 1.6%; transverse shrinkage is 1.4% to 1.8% depending on wall thickness, melt temperature, mould temperature, and hold pressure. The difference between flow and transverse shrinkage arises from molecular orientation and frozen-layer stresses. Total volumetric shrinkage during cooling from melt to 23°C is approximately 16% for unfilled homopolymer PP; the moulded part compensates through packing and geometric constraint. Uncompensated volume loss appears as sink marks in ribs, bosses, and wall intersections.
In multi-rib designs, rib-to-wall thickness ratio should be kept between 0.5 and 0.7. Ratios above 0.8 create an effective section increase that exceeds the packing capability of the gate and produces sinks and voids. Rib heights should generally not exceed 3 times the nominal wall thickness; beyond this, ejection forces increase and differential cooling can cause warpage. Bosses for self-tapping screws should be designed with an outer diameter of at least 2.5 times the screw core diameter and a wall thickness not exceeding 0.75 times the nominal wall to avoid sink marks.
Commercial moulding tolerances for polypropylene homopolymers are typically ±0.1 mm for dimensions up to 25 mm, ±0.2 mm for dimensions from 25 mm to 100 mm, and ±0.3 mm for dimensions from 100 mm to 250 mm when the tool is cut with production shrinkage values. Post-moulding crystallisation can continue for up to 48 h; dimensional inspection should occur after a minimum of 24 h at 23°C and 50% RH to avoid misleading measurements.
The selection boundary between H034SG and random or impact copolymers is governed by stiffness, impact, and optical requirements. Random copolymers contain 1.5 wt% to 4.0 wt% ethylene in the propylene chain; this disrupts crystallinity and reduces flexural modulus to approximately 900 MPa to 1100 MPa. The modulus penalty of 20% to 30% may be unacceptable in load-bearing parts such as appliance housings and chair frames. H034SG retains approximately 1450 MPa flexural modulus under ISO 178:2019. Random copolymers are selected for clarity and lower sealing temperatures, not for structural stiffness.
Impact copolymers contain ethylene-propylene rubber domains that raise notched Izod values at 23°C to 8 kJ/m² and above, and at -20°C often above 6 kJ/m². H034SG, as a homopolymer, has a notched Izod value of about 3.0 kJ/m² at 23°C and falls below 2.0 kJ/m² at 0°C. Therefore H034SG is not selected where sub-zero drop impact or frozen-food service temperatures are primary requirements. The advantage of H034SG is higher stiffness and higher heat deflection, not impact toughness.
| Grade family | MFR range | Flexural modulus | Notched Izod at 23°C | Optical character |
|---|---|---|---|---|
| Repol PP H034SG homopolymer | 3.4 g/10 min | 1450 MPa | 3.0 kJ/m² | Translucent to opaque |
| Random copolymer | 2 g/10 min to 8 g/10 min | 900 MPa to 1100 MPa | 4 kJ/m² to 7 kJ/m² | High clarity |
| Impact copolymer | 3 g/10 min to 20 g/10 min | 1000 MPa to 1300 MPa | 8 kJ/m² to 30 kJ/m² | Opaque |
