| HS Code | 526210 |
| Melt Flow Rate 230c 2 16kg | 3.1 g/10min |
| Density | 0.905 g/cm3 |
| Tensile Stress At Yield | 35 MPa |
| Tensile Elongation At Yield | 12% |
| Tensile Modulus | 1700 MPa |
| Flexural Modulus | 1400 MPa |
| Charpy Notched Impact Strength 23c | 4 kJ/m2 |
| Charpy Notched Impact Strength Minus20c | 1.5 kJ/m2 |
| Ball Indentation Hardness H358 30 | 70 MPa |
| Vicat Softening Temperature 10n | 153 C |
| Heat Deflection Temperature 0 45mpa | 90 C |
| Melting Temperature | 163 C |
As an accredited SIBUR PP Homopolymer PP H031 BF factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SIBUR PP Homopolymer PP H031 BF is supplied as virgin pellets in 25 kg moisture-proof bags, palletized and stretch-wrapped. |
| Container Loading (20′ FCL) | 20′ FCL: SIBUR PP H031 BF loaded as 25 kg bags, palletized, ~20–22 MT per container for safe transport. |
| Shipping | SIBUR PP Homopolymer PP H031 BF is a non-hazardous polypropylene resin shipped in sealed bags, octabins, or bulk hopper containers. Protect from moisture, direct sunlight, and high heat to prevent degradation. Transport in clean, dry vehicles; no special dangerous goods labeling required, but handle carefully to avoid bag damage. |
| Storage | Store SIBUR PP Homopolymer PP H031 BF in a dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid contact with oxidizing agents. Maintain moderate temperatures to preserve material quality. Protect from mechanical damage and ensure proper handling to prevent dust accumulation. |
| Shelf Life | Store in a cool, dry area away from sunlight and heat. Shelf life is typically 12 months from delivery when unopened. |
SIBUR PP H031 BF is a Ziegler–Natta homo-polypropylene grade with a nominal melt flow rate of 3.2 g/10 min under ISO 1133-1:2022 at 230 °C and 2.16 kg. The grade’s controlled isotacticity and low gel contribution are documented in the producer’s technical data sheet and are relevant to oriented film, tape, monofilament and extrusion coating conversion. The application profiles are structured around verified downstream routes only; each route specifies the applicable compliance framework, the loading ratio of H031 BF and functional masterbatches, the downstream production process, and terminal product types.
| Application route | Regulation/standard | Clause or test method | Boundary condition |
|---|---|---|---|
| BOPP film | EU No 10/2011; FDA 21 CFR 177.1520 | Overall migration ≤10 mg/dm²; Annex III simulants | Single-use food contact |
| Cast film | EU No 10/2011; FDA 21 CFR 177.1520; ISO 527-3; ISO 6383-2 | Tensile and tear methods | Chill roll 18–25 °C |
| Raffia tape/woven sacks | ISO 21898:2004; EU No 10/2011; FDA 21 CFR 177.1520 | FIBC safety factor requirements; migration limits | CaCO₃ ≤8 wt% |
| Monofilament | ASTM D3218-07; REACH Annex XVII | Linear density and break strength | Regrind ≤15 wt% |
| Extrusion lamination/coating | ASTM F88/F88M-21; EU No 10/2011; FDA 21 CFR 177.1520 | Seal strength and migration | Melt temperature 240–270 °C |
On tenter-frame BOPP lines producing 15–40 µm coextruded films, SIBUR PP H031 BF functions as the core-layer homopolymer in three-layer ABA structures. The core layer typically comprises 70–85 wt% of the finished film, formulated with 100 parts H031 BF and, where downgauging is required, 5–15 parts of a hydrogenated C5/C9 hydrocarbon resin masterbatch per 100 parts base resin to increase moisture barrier and lower optical haze without shifting the film’s friction behaviour. Slip and antiblock additives are normally isolated in the skin layer at 1–3 wt% of the skin-layer formulation, because distributing these particulates in the core raises the risk of void formation during transverse stretching. Process sequence: dry blending, single-screw extrusion at 230–260 °C, slot die casting onto a 20–25 °C chill roll, machine-direction orientation at 120–145 °C with a draw ratio of 4.5–5.5:1, transverse-direction orientation in a tenter oven at 155–170 °C with a draw ratio of 7.5–9.5:1, and annealing at 100–120 °C. Food-contact compliance for oriented polypropylene film is assessed under Commission Regulation (EU) No 10/2011 as amended by (EU) 2020/1245, with overall migration ≤10 mg/dm² using Annex III food simulants, and under FDA 21 CFR 177.1520 for olefin polymers in U.S. single-use packaging. Terminal film types include metallised barrier film, cold-seal release film, adhesive tape backing, label face stock, overwrap for cigarette and confectionery packs, and lamination substrate for flexographic or rotogravure printing.
Production-scale records from Bruckner and DMT tenter lines indicate that the optimum transverse stretching window for H031 BF is bounded by cavitation at low preheat temperature and edge tear at high transverse draw. If the MFR drifts from 3.2 g/10 min to 3.6 g/10 min within a batch campaign, the transverse oven temperature is typically lowered by 5–10 K to maintain bubble stability; if the isotactic index falls by more than 1.5 percentage points, gauge-band defects appear at the interchanging clips. Film property verification on 25 µm film should be conducted according to ASTM D882 for tensile modulus and elongation, ASTM D1003 for haze, ASTM D1894 for coefficient of friction, and ISO 15106-1 or ASTM F1249 for water vapour transmission rate. Failure modes observed in field data include champagne air lines caused by insufficient chill roll contact, melt fracture at die exit when melt temperature falls below 225 °C, and TDX stretch banding when tenter zones are not balanced within ±2 K. H031 BF film is not suitable for direct food contact unless the intended food simulant conditions are tested on the finished laminate; metallised structures require separate pinhole and migration testing before food-contact use.
Cast polypropylene film conversion with H031 BF is run on single-screw extruders with L/D ratios from 30:1 to 36:1 and barrel temperature profiles from 200 °C to 260 °C, with a slot die maintained at 240–260 °C. The base formulation uses 100 parts H031 BF; a combination of slip and antiblock masterbatch is added at 1–2 wt%, and an additive package is dosed at 500–1,500 ppm to suppress thermo-oxidative degradation at the die lips. The addition ratio of cast film regrind is limited to 10–20 wt% because higher levels widen the MFR distribution and produce visible melt-rail bands. The downstream process consists of die extrusion, air-knife pinning to a polished chill roll held at 18–25 °C, corona treatment at 38–44 mN/m, edge trim recycling, and centre-surface winding with contact pressure control. Industry compliance for cast film used in food-contact lamination is evaluated under EU Regulation (EU) No 10/2011 with overall migration ≤10 mg/dm² and under FDA 21 CFR 177.1520; mechanical properties are tested according to ISO 527-3 for film tensile behaviour and ISO 6383-2 for Elmendorf tear resistance. Terminal product types include textile packaging film, document lamination base film, adhesive lamination film, food-contact lamination web, and decorative ribbon substrate. Chill roll temperatures above 30 °C lead to plate-out of low-molecular-weight fractions on the roll surface and cause optical haze; temperatures below 15 °C generate condensation marks that cannot be erased by corona treatment. Copper-containing masterbatches are not used with H031 BF above 250 °C melt temperature because copper ion catalysis accelerates chain scission and produces melt-pressure instability.
Cast film produced from H031 BF shows a broader quench-temperature operating window than higher-MFR grades because the lower melt flow reduces chill roll blocking at the same film thickness. At line speeds above 220 m/min, melt bank instability and edge neck-in become the dominant defects; neck-in on 20 µm film typically reaches 25–40 mm per side unless the die gap is reduced to 0.5–0.8 mm and the vacuum box slot distance is kept below 5 mm. Winding tension is tapered from 100 N/m to 40 N/m over the roll diameter to prevent blocking and pressure marks. These parameters are verified by laser thickness gauging with a tolerance of ±1.0 µm.
At tape line speeds ranging from 120 m/min to 250 m/min, flat tape extrusion from H031 BF is carried out for woven sacks and flexible intermediate bulk containers. The formulation consists of 100 parts H031 BF, 1.0–2.5 wt% UV stabiliser masterbatch, 0.5–1.5 wt% colour/processing masterbatch, and up to 8 wt% calcium carbonate masterbatch in non-regulated sacks; for FIBC body fabric, calcium carbonate is normally omitted or held below 3 wt% to preserve tenacity under ISO 21898:2004. The process includes slit-film extrusion through a water bath at 30–40 °C, tape slitting to widths of 2.0–3.2 mm, orientation at a draw ratio of 1:6–1:8 between heated godets at 110–140 °C, relaxation at 0.5–1.5%, precision winding, and circular loom weaving with warp/weft tension control. Industry compliance for FIBCs used for non-dangerous goods is ISO 21898:2004; food-contact woven sacks produced without recycled content are assessed under EU No 10/2011 and FDA 21 CFR 177.1520. Terminal product types include fertiliser bags, rice bags, FIBC bulk containers, carpet backing, and geotextile reinforcement grids. Field experience shows that draw resonance begins when H031 BF tape is drawn beyond 8:1 at MFR above 3.5 g/10 min; the resulting tape denier variation of ±8% generates weaving breaks and reduces burst strength.
In two-stage monofilament orientation for agricultural twine and strapping, H031 BF is processed at 100 parts with 1–2 wt% UV/processing masterbatch; for long-life agricultural netting, a HALS package of 2–4 wt% is incorporated. The production sequence uses single-screw extruders with L/D 30:1, spin-beam nozzles, water-bath quenching at 20–35 °C, first-stage draw ratio 1:5.5–1:7.5 at 110–140 °C, second-stage draw ratio 1:1.5–1:2.0 at 120–150 °C, relaxation 3–8%, and winding under constant tension. Industry compliance for polyolefin monofilaments is set by ASTM D3218-07 for linear density and break strength, with conditioning under ISO 291; REACH Annex XVII applies to the base polymer and additives in the European market. Terminal product types include baler twine, rope yarn, agricultural netting, concrete fibre reinforcement, and heavy-duty strapping. A production-scale failure mode appears when the quench bath temperature falls below 18 °C: internal voids form in 0.15–0.30 mm monofilaments and generate premature tensile failure under ISO 527-1 loading. Regrind content should not exceed 15 wt% or filament elongation at break falls below 30%. Published third-party low-temperature dynamic mechanical data for this specific grade in monofilament service is limited; validation at sub-zero temperatures under ISO 527-3 and ISO 179 conditions is recommended before deployment in cold-climate geotextile applications.
Extrusion lamination of woven PP fabric and paper with H031 BF requires a higher melt temperature than conventional higher-MFR coating grades to compensate for the 3.2 g/10 min melt flow. The coating blend is formulated with 100 parts H031 BF and 1–2 wt% adhesion-promoting or processing masterbatch; in food-contact pouch laminates, the heat-seal layer may be coextruded with a random copolymer skin at 10–30 wt% of the coating structure to reduce seal initiation temperature. The process involves pre-drying the substrate at 60–70 °C for 2 h when storage RH exceeds 60%, unwinding with 50–100 N/m web tension, melt extrusion through a flat die at 240–270 °C, nip lamination at line speeds 5–10 m/min slower than higher-MFR resins, and edge recycling. Compliance for food-contact lamination is assessed under EU No 10/2011 and FDA 21 CFR 177.1520; adhesion strength is measured according to ASTM F88/F88M-21 for seal strength and ISO 527-3 for coating tensile elongation. Terminal products include laminated FIBC liners, multi-wall paper sacks, printed wrapping paper, and lamination film for protective apparel packaging. The operational boundary is die-lip build-up caused by low-MFR coating grades; when melt temperature exceeds 270 °C, gel formation increases and coating weight drops below 15 g/m² at normal line tension. This grade is not suitable for high-speed extrusion coating above 150 m/min unless the extruder screw is configured with low-shear mixing elements that prevent excessive shear heating.
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SIBUR PP Homopolymer PP H031 BF is an isotactic polypropylene homopolymer supplied in pellet form for biaxially oriented film, slit tape, strapping and oriented monofilament conversion. The melt mass-flow rate is specified at 3.0 g/10 min when measured at 230 °C under a 2.16 kg piston load according to ISO 1133-1:2022, placing the material in the lower medium-flow sector. Unfilled pellet density is normally certified between 0.905 g/cm³ and 0.910 g/cm³ under ISO 1183-1:2019 at 23 °C. The grade is a controlled-rheology homopolymer with a higher isotactic crystallization tendency than propylene–ethylene random copolymers; this characteristic raises stiffness and thermal resistance but narrows the low-temperature impact window. Producers typically report a Vicat softening point of 150–156 °C by the A50 method under ISO 306:2022, and a tensile yield stress of 34–38 MPa on injection-moulded type 1A specimens under ISO 527-2:2012 at 50 mm/min. The BF suffix is associated with film-grade purity and low visible gel counts, although each conversion site must verify the producer’s certificate of analysis for the specific lot in use.
On tenter-frame biaxially oriented polypropylene film lines, the material is processed through a primary extruder of 90–120 mm diameter with a 30:1 to 36:1 L/D barrier screw, a geared melt pump and a filter pack containing 25–32 µm woven or sintered media. Cylinder set temperatures are generally staged from 210 °C in the feed throat to 250 °C in the metering zone, while the flat die body is held at 240–260 °C and the melt is discharged through a coat-hanger manifold. The melt should remain below 270 °C for extended residence periods because isotactic polypropylene undergoes oxidative chain scission that raises melt flow rate and reduces film toughness; residence times above 10 min at high screw speed can increase gel formation in the die lips. After die exit, the web is pinned electrostatically or by air knife to a chill roll operated at 15–25 °C, followed by a water bath or secondary cooling roll. A quench temperature above 30 °C slows crystallization and produces a coarser crystalline superstructure, which increases cast-sheet yield stress and can destabilize the subsequent machine-direction drawing point.
Sequential orientation parameters for medium-melt-flow homopolymers on sequential tenter systems include machine-direction draw ratios of 4.5:1 to 5.5:1 and transverse-direction draw ratios of 7.5:1 to 10:1. Pre-heat roll temperatures in the machine-direction orientation unit are commonly set at 120–135 °C, and the transverse oven zones are ramped from 155 °C to 170 °C. These temperatures are selected because biaxial orientation below the alpha-relaxation range can generate excessive stress and edge cracks, while higher temperatures reduce orientation efficiency and lower film stiffness. Converters monitor web temperature non-uniformity with infrared line scanners; a gap of ±3 °C across the transverse oven is sufficient to create visible gauge bands. The resulting oriented film exhibits anisotropic mechanical properties. Typical commodity biaxially oriented polypropylene films based on this resin class show machine-direction tensile strength of 120–180 MPa and transverse-direction tensile strength of 220–300 MPa when tested as 20–25 µm film at 23 °C under ISO 527-3:2018 at a test speed of 250 mm/min. Elongation at break in the machine direction is often reduced to 60–120 % after orientation, compared with 400–600 % for the isotropic cast sheet, reflecting the high molecular orientation frozen into the crystalline and tie-chain network.
For flexible packaging overwrap and adhesive tape base, the biaxially oriented film is surface-treated from an initial surface energy of approximately 30–32 mN/m to 38–42 mN/m by corona discharge or flame to receive printing inks and water-based acrylic or hot-melt adhesives. Wetting tension is measured under ISO 8296:2003; treatment levels above 44 mN/m can oxidatively degrade the surface and cause blocking. Because PP H031 BF is supplied without migratory slip or anti-block additives unless added by the compounder, the film recipe must incorporate silica or tailored masterbatches at 0.05–0.20 wt% for stable high-speed winding. Heat-seal performance is not provided by the homopolymer itself; a sealable random-copolymer skin layer with heat-seal initiation near 105–120 °C is coextruded or laminated on the core. Peel strength of adhesive tape backing is defined by the backing rather than the polypropylene alone, and converters test the finished tape with ASTM D3330/D3330M-04(2018) for adhesion to steel.
Virgin PP H031 BF pellets typically require no desiccant drying because polypropylene does not absorb bulk water. Condensation on pellet surfaces at loading areas with relative humidity above 60 % can be removed by hopper heating at 70–80 °C for 1–2 h to prevent surface splay on the cast film or tape.
The defining difference is the absence of intentional ethylene or butene comonomer in the chain. Random copolymer grades disrupt crystallizable sequence length and lower modulus, seal-initiation temperature and haze. Impact copolymer grades contain a dispersed elastomeric ethylene–propylene phase that absorbs low-temperature energy but reduces stiffness and optical clarity. The following table compares typical published ranges for commercial grades in the same melt-flow category; the values are representative industrial envelopes and must not substitute for a producer’s lot certificate.
| Property and test condition | PP H031 BF homopolymer | Random copolymer equivalent | Impact copolymer moderate flow |
|---|---|---|---|
| Melt mass-flow rate, ISO 1133-1:2022, 230 °C, 2.16 kg, g/10 min | 3.0 | 3.0 | 2.5–4.0 |
| Density, ISO 1183-1:2019, g/cm³ | 0.905–0.910 | 0.900–0.905 | 0.900–0.910 |
| Tensile yield stress, ISO 527-2:2012, MPa | 34–38 | 27–32 | 24–28 |
| Flexural modulus, ISO 178:2019, MPa | 1350–1550 | 950–1100 | 1100–1350 |
| Notched Charpy impact, 23 °C, ISO 179-1:2010, kJ/m² | 4–6 | 8–12 | 20–40 |
| Notched Charpy impact, 0 °C, ISO 179-1:2010, kJ/m² | 2.5–3.5 | 3–5 | 5–10 |
| Vicat softening temperature A50, ISO 306:2022, °C | 150–156 | 128–135 | 140–150 |
| Haze on 2 mm plaque, ISO 14782:2021 or ASTM D1003-21, % | 1.5–2.5 | 0.8–1.8 | 2.5–5.0 |
The homopolymer’s higher flexural modulus of 1350–1550 MPa compared with 950–1100 MPa for a random copolymer allows a converter to reduce film thickness while retaining a specified stiffness, or to produce a stiffer tape fabric for geotextile weaving. The trade-off is evident at 0 °C and below; notched Charpy impact energy for the homopolymer is much lower, so packages exposed to frozen distribution are usually produced from random or impact copolymers. A heat-seal lacquer or separately coextruded skin is required for PP H031 BF films because the homopolymer has no broad sealing plateau and its seal initiation is above 130 °C, which is too high for high-speed vertical form-fill-seal equipment running back seals at 110–125 °C.
The extrusion and orientation conditions shift because the flat or circular die is followed by slit films or tapes that are drawn through a hot-air oven or hot plate at 100–130 °C. In this application, PP H031 BF can be dry-blended with 1.5–2.5 wt% of a calcium carbonate or talc-filled masterbatch for anti-fibrillation control and controlled surface roughness. The melt is quenched in a water bath at 30–40 °C; bath temperatures above 45 °C reduce quench efficiency and produce low-orientation tape with higher residual shrinkage. After slitting, the tape passes over heated draw stands at draw ratios between 5:1 and 8:1. Under such conditions, tensile tenacity values of 5.0–6.5 cN/dtex and elongation at break values of 15–30 % are typical when tested according to ISO 2062:2009 or ASTM D2256/D2256M-21. Higher draw ratios may raise tenacity by increasing orientation, but the tape can become too brittle and may split during weaving or twisting. This is distinct from biaxially oriented film conversion, where orientation occurs in two axes and the product is a thin film rather than a uniaxially oriented fibrous tape.
This homopolymer grade is not formulated as a high-melt-flow spunbond or meltblown product. Spunbond polypropylene usually requires an MFR above 25 g/10 min for uniform filament draw at high speed; using a 3.0 g/10 min resin in a spunbond die would generate excessive melt pressure and brittle filaments with limited drawability. It is also not a high-melt-strength grade for thermoforming or extrusion foam, where long-chain branching or very high molecular weight is required. In injection moulding of technical closures or furniture, a 3.0 g/10 min melt can be processed with melt temperatures of 220–240 °C and mould temperatures of 20–40 °C, but rubber-modified impact grades are preferred when parts must survive repeated impact at sub-zero temperatures.
For food-contact film structures, the final article must comply with the overall migration limits of Commission Regulation (EU) No 10/2011 and, for United States applications, the conditions of 21 CFR 177.1520(c) governing olefin polymers. Compliance testing is performed on the finished film or tape using food simulants under EN 1186-1:2002 or FDA migration protocols, not on the pellet alone. Processors should request the producer’s chemical inventory declarations for REACH and RoHS 2011/65/EU if the film is exported to the European Union. Residual low-molecular-weight oligomer content and catalyst-residue levels are lot-dependent; published data for this specific grade configuration are limited, so converters must validate extraction with their own analytical methods if the application involves fatty foods or infant formula.
