| HS Code | 798559 |
| Product Name | REPOL PP Homopolymer H350FG |
| Polymer Type | Polypropylene Homopolymer |
| Melt Flow Rate 230 C 2 16 Kg | 35 g/10 min |
| Density | 0.90 g/cm³ |
| Tensile Strength At Yield | 35 MPa |
| Elongation At Yield | 10% |
| Flexural Modulus | 1400 MPa |
| Izod Impact Strength Notched 23 C | 3 kJ/m² |
| Izod Impact Strength Notched 20 C | 1.5 kJ/m² |
| Heat Deflection Temperature 0 45 Mpa | 95 °C |
| Vicat Softening Point | 150 °C |
| Melting Point | 165 °C |
| Rockwell Hardness | R105 |
As an accredited REPOL PP Homopolymer H350FG factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | REPOL PP Homopolymer H350FG is supplied in 25 kg multi-wall paper bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL container loaded with REPOL PP Homopolymer H350FG, polypropylene resin, securely packed and stowed for safe transport. |
| Shipping | REPOL PP Homopolymer H350FG ships as non-hazardous polypropylene resin in sealed bags or bulk containers. Protect from moisture, direct heat, and contamination during transit. Store in dry, ventilated conditions. Ensure proper labeling and handling to preserve polymer integrity and flow properties until final processing. |
| Storage | Store REPOL PP Homopolymer H350FG in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep in original sealed packaging to prevent moisture contamination and physical damage. Avoid stacking excessively. Ensure warehouse floor is clean and dry. Follow local regulations and maintain proper labeling. |
| Shelf Life | Shelf life is two years from manufacturing date when stored in dry, cool conditions, protected from sunlight in original packaging. |
The spunbond route for disposable hygiene and medical barrier nonwovens uses H350FG as the primary continuous phase in a single-stage spunbond line with spinneret hole densities between 4,800 and 7,000 holes per metre and individual hole diameters from 0.35 mm to 0.55 mm. The melt pump is set to hold head pressure between 6.0 MPa and 10.0 MPa, and the extruder barrel is typically profiled from 210 °C in the feed zone to 240 °C at the adapter without exceeding 250 °C at the spin beam, because chain scission and oxidised gel formation rise measurably above this threshold. For hygiene-facing webs, the extrusion feed is dosed as 100 phr H350FG with 1.5–3.5 wt% TiO₂ masterbatch and 0.2–0.8 wt% of a combined slip and antistat masterbatch; antimicrobial masterbatches, when specified, are added at 0.5–2.0 wt% only after vendor validation for fibre spinning stability. Compliance screening for converted nonwoven roll stock references ISO 9092:2024 for nonwoven classification, ISO 9073-1:2023 for mass per unit area, ISO 9073-3:2023 for machine-direction and cross-direction tensile properties, and ISO 9073-4:2023 for tear resistance. Where the fabric enters medical device assembly, cytotoxicity and skin sensitisation evidence is generated under EN ISO 10993-5:2009 and EN ISO 10993-10:2021, with polymer compositional compliance documented under EU Regulation (EC) No 1907/2006 and, for food-contact laminate components, FDA 21 CFR 177.1520. Terminal articles produced through this route include diaper acquisition and distribution layers, leg cuff nonwovens, sanitary pad coverstock, surgical gown fabric, isolation gown panels, shoe-cover base webs, and outer face-mask layers. The dominant processing limitation is not melt flow but calender bonding: bond temperatures below 138 °C produce low peel strength, while temperatures above 150 °C create film-like embrittlement and loss of textile handle, so the calender nip is held at 50–80 N/mm line pressure with a roll surface temperature tolerance of ±1.5 °C.
Agricultural spunbond produced from H350FG is stabilised against photodegradation through co-extrusion of hindered amine light stabiliser and UV absorber masterbatches at total addition levels between 2.0 wt% and 5.0 wt%, with the lower end of the range applied to short-season mulch replacement fabrics and the upper end applied to multi-season greenhouse shading and vine-cover materials. The base resin remains at 100 phr, while TiO₂ is added at 2.0–4.0 wt% where white webs are required, and a magnesium-aluminium carbonate acid scavenger is dosed at 0.03–0.10 phr to neutralise residual chlorine residues carried over from catalyst systems. The processing route differs from hygiene spunbond in that basis weight is increased to 17–50 g/m², the quench air temperature is maintained between 16 °C and 22 °C to stabilise filament diameter at lower line speeds, and the calender bonding window is shifted upward to 140–150 °C to compensate for the heavier web mass. Artificial weathering evaluation is typically conducted under ISO 4892-2:2013 cycle 1 or cycle 4, with a common acceptance criterion of retained tensile strength greater than 70% after 1,000 h exposure when tested according to ISO 9073-3:2023; published data for this specific grade and exposure configuration is limited, so converter qualification usually includes a field-trial benchmark against a reference stabilised PP web. Regulatory review for agricultural nonwovens generally does not require medical or food-contact clearance but does include evidence of REACH compliance and, for products placed into soil-contact service, documentation of heavy-metal content under EU Regulation (EU) 2019/1009 fertilising product secondary component limits where applicable. Terminal product categories include crop protection fleece, frost-cover nonwovens, weed suppression mats, greenhouse shade cloth, vine and fruit cover stock, and bundled tree-guard fabric. The main operational boundary is additive loading: above 5.0 wt% total masterbatch, filament draw resonance increases and web basis-weight uniformity degrades, while below 2.0 wt% UV masterbatch the fabric fails accelerated weathering criteria rapidly and loses mechanical integrity before the intended seasonal replacement interval.
Thermal-bonded staple fibre nonwovens derived from H350FG depend less on melt-phase rheology after spinning than on crimp frequency, cut length, and carded web mass uniformity. The staple process begins with the same melt extrusion step at 230–260 °C, followed by drawing at 90–120 °C using draw ratios between 3.2:1 and 4.5:1, crimping to 8–14 crimps per centimetre, and cutting to fibre lengths from 6 mm to 51 mm depending on the carding line and final web weight. Spin finish is applied at 0.3–0.6 wt% by fibre mass, and pigment masterbatch is dosed at 1.0–3.0 wt% with the base polymer held at 100 phr; antistatic agents, when required for dry-laid carding, are added through a separate finish formulation rather than through the melt to avoid interfering with downstream thermal bonding. The carded web is bonded on a through-air oven or heated calender at 130–145 °C, with the bonding temperature selected to fuse the homopolymer fibre surface without full melting and without collapsing the fibre crimp structure. Compliance for hygiene-grade staple fibre webs references ISO 1133-1:2022 for incoming melt flow rate confirmation, ISO 9073-1:2023 for basis-weight verification, ISO 9073-2:1995 for thickness, and ISO 9073-3:2023 for tensile properties; where the fibre is intended for skin-contact disposable applications, OEKO-TEX Standard 100 Annex 4 class I testing is commonly specified. Terminal products include acquisition and distribution layers for infant diapers and adult incontinence pads, feminine hygiene core wraps, absorbent air-laid carrier webs, automotive acoustical padding, mattress coverstock, and filtration support layers. The primary process limitation occurs at the carding stage rather than the extruder: crimp amplitude below 8 crimps per centimetre or cut-length non-uniformity above ±5% leads to web drafting, edge fishtailing, and unacceptable basis-weight coefficient of variation above 8%.
Continuous filament yarn produced from H350FG is processed on a spin-draw or spin-draw-bulked line with first godet speeds between 2,800 m/min and 3,300 m/min, second godet speeds between 3,200 m/min and 3,700 m/min, and hot godet temperatures limited to 80–120 °C to avoid filament fusion on the roll surface. The extrusion temperature at the spin beam is held between 235 °C and 255 °C, and the spin finish is applied at 0.4–0.8 wt% by yarn mass to neutralise static charge and control yarn-to-ceramic friction during drawing. The formulation uses H350FG at 100 phr, with UV-stabilised masterbatch at 0.2–0.6 wt% only for outdoor end uses and pigment masterbatch at 1.0–3.0 wt% for coloured technical yarns; acid-scavenger dosing is maintained at 0.03–0.10 phr where extended hot-draw residence is expected. Yarn tenacity for high-flow homopolymer in the 220–440 dtex range generally falls between 12 cN/tex and 18 cN/tex when tested under ASTM D2256-21, and elongation at break is controlled between 30% and 50% by draw ratio adjustment; published data for this specific grade and godet configuration is limited, so converter trials should establish the draw-ratio response curve before full production. Quality assurance for continuous filament yarn references ISO 2062:2009 for yarn tensile properties and ISO 2076:2013 for generic fibre identification, while outdoor textile end uses are screened under ISO 4892-2:2013 for UV degradation and ISO 105-B02:2014 for colour fastness to artificial light. Terminal products include woven geotextiles, rope and twine constructions, furniture webbing, carpet backing yarn, industrial sewing thread, and braided utility cords. The operational boundary is draw ratio: below 2.5:1 the yarn retains excessive elongation and poor creep resistance, while above 4.5:1 the filament denier becomes unstable and the high-melt-flow homopolymer exhibits excessive break frequency in the hot-draw zone.
Compounding of high-flow homopolymer carrier resin for masterbatch production is a secondary but documented downstream route in which H350FG functions as the continuous matrix for pigment and additive concentrates. A typical colour concentration formulation comprises 40–70 wt% carrier resin, 20–50 wt% pigment or functional additive, 2–8 wt% wax dispersant, and 0.5–1.5 wt% processing aid, with the exact ratio dictated by pigment oil absorption and required pellet dilution ratio. The compounding process is performed on a co-rotating twin-screw extruder with an L/D ratio of 40–52, barrel temperatures from 160 °C to 220 °C, and vacuum devolatilisation at 0.06–0.09 MPa to remove moisture and oligomer volatiles before strand pelletising. Compliance for masterbatch shipments is commonly documented under EU Regulation (EC) No 1907/2006 and Directive 2011/65/EU Annex II, with heavy-metal migration testing under EN 71-3:2019 where the finished article may enter toy supply chains; food-contact masterbatches require confirmation under EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520 before use in food packaging. Terminal product forms are pelletised masterbatch batches for nonwoven tinting, packaging colouration, and injection-moulded consumer goods. The process has a narrow degradation boundary: residence time above 3 minutes at 220 °C in the fully filled screw zones can produce chain scission and reduce the carrier MFR by more than 10%, so the screw speed and feed rate are balanced to maintain specific mechanical energy below 0.25 kWh/kg.
Needle-punched geotextile conversion from coarse staple fibres is a low-speed nonwoven process in which the polymer contribution is fixed after fibre extrusion and the conversion variables dominate the final mechanical response. For this application, H350FG-based staple fibre is specified at 6.7–17 dtex with cut lengths between 64 mm and 120 mm, and the extruder feed formulation includes 100 phr H350FG, 0.4–0.7 wt% spin finish, 0.2–0.5 wt% UV stabiliser masterbatch, and 1.0–3.0 wt% carbon black or pigment masterbatch where black geotextile is required. Carded fibre is cross-lapped into a web and then needle-bonded at 150–500 punches per square centimetre with needle penetration depths between 10 mm and 14 mm, depending on target fabric density and puncture resistance; the resulting nonwoven is typically not thermally bonded, so needle density is the primary variable controlling mechanical interlocking. Mechanical acceptance testing references ISO 10319:2015 for wide-width tensile properties, ISO 12236:2006 for static puncture resistance, ISO 13433:2006 for dynamic perforation resistance, and ISO 9862:2005 for installation-related tensile creep, while product standards include EN 13249:2016 for separation and filtration geotextiles and EN 13253:2016 for erosion control systems. Terminal product categories include roadbed separation geotextiles, railway subgrade stabilisation fabric, landfill drainage layers, reservoir lining protection, erosion control mats, and coastal revetment reinforcement. The primary processing limitation is fibre denier mismatch: fine fibres below 6.7 dtex form a tighter felt but reduce puncture resistance at low fabric weight, while coarse fibres above 17 dtex improve puncture performance but require higher needle density to reach acceptable grab tensile strength.
| Conversion route | Additive or masterbatch dosing | Critical process window | Reference standard |
|---|---|---|---|
| Hygiene and medical spunbond | 1.5–3.5 wt% TiO₂; 0.2–0.8 wt% slip/antistat | Spin beam 235–250 °C; calender 138–150 °C | ISO 9073-3:2023 |
| Agricultural spunbond | 2.0–5.0 wt% UV masterbatch; 2.0–4.0 wt% TiO₂ | Web 17–50 g/m²; calender 140–150 °C | ISO 4892-2:2013 |
| Thermal-bonded staple fibre | 0.3–0.6 wt% spin finish; 1.0–3.0 wt% pigment | Draw ratio 3.2:1–4.5:1; bond 130–145 °C | ISO 9073-1:2023 |
| Continuous filament yarn | 0.4–0.8 wt% spin finish; 0.2–0.6 wt% UV stabiliser | Hot godets 80–120 °C; draw ratio 2.5:1–4.5:1 | ASTM D2256-21 |
| Masterbatch carrier | 40–70 wt% carrier; 20–50 wt% pigment | Barrel 160–220 °C; residence <3 min | EN 71-3:2019 |
| Needle-punched geotextile | 0.4–0.7 wt% spin finish; 0.2–0.5 wt% UV stabiliser | Needle density 150–500/cm²; penetration 10–14 mm | ISO 10319:2015 |
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REPOL PP Homopolymer H350FG is an unfilled polypropylene homopolymer injection moulding grade. The melt mass-flow rate is nominally 35 g/10 min at 230 °C under 2.16 kg load when tested to ISO 1133-1:2022. The neat polymer density is typically 0.905 g/cm³ when tested to ISO 1183-1:2019. The numeric segment of the grade name corresponds to the nominal melt-flow class; the FG suffix is associated by Reliance Industries Limited with food-contact positioning in rigid packaging and closure conversion. The material is homopolymer rather than random copolymer. It therefore gives higher stiffness and heat resistance than unfilled random copolymer grades, but lower notched impact strength than heterophasic impact copolymers. Primary conversion is injection moulding of thin-wall containers, caps, closures, housewares, storage bins, toy components and appliance housings. In multi-cavity hot-runner tools, the high melt-flow class reduces the hydraulic injection pressure required for thin sections, but narrows the temperature window before gate-stringing or drool occurs.
At a given melt temperature, a 35 g/10 min polypropylene homopolymer exhibits lower shear viscosity than 12 g/10 min and 20 g/10 min homopolymer grades. This permits filling of wall sections down to 0.5 mm in closure and container tools where gate diameter, vent depth, and injection speed are matched to the grade. On single-screw injection moulding machines with 20:1 to 25:1 L/D general-purpose polypropylene screws and compression ratio 2.5:1, melt temperature should be kept between 220 °C and 250 °C. Below 220 °C, flow length decreases and injection pressure rises; above 250 °C, oxidative degradation may shift MFR and create discoloration. Mould temperature should be maintained from 20 °C to 50 °C. The lower range minimizes cycle time in thin-wall packaging; the upper range improves replication of textured surfaces and reduces moulded-in stress in rigid parts.
Fill time in thin-wall applications is commonly set from 0.2 s to 0.8 s for wall sections between 0.5 mm and 1.2 mm. Injection pressure at transfer typically falls between 60 MPa and 90 MPa depending on flow-length-to-wall-thickness ratio, gate geometry, and melt temperature. Hold pressure and gate seal time require tool-specific optimisation. Because high-MFR grades have shorter gate seal time than lower-MFR homopolymers, removal of hold pressure before gate freeze produces sink marks and dimensional variation. In production experience, hot-runner nozzle temperature should be controlled within ±5 °C of a 240 °C set point; excursions above this window may cause drool and stringing in open nozzles.
Capillary rheometry of 35 g/10 min polypropylene homopolymer at 230 °C shows shear-thinning from 100 s⁻¹ to 10,000 s⁻¹; the power-law index is typically in the range 0.35–0.45. This non-Newtonian behaviour reduces pressure at high shear rates in gates and thin walls. At low shear rates during packing, viscosity remains lower than that of a 12 g/10 min homopolymer, so the hold-pressure window is narrower. Rheological data for incoming lots should be checked by ISO 11443 capillary rheometry when changing supplier, lot, or regrind content.
Table 1 lists typical lot-to-lot values obtained from test specimens injection moulded according to ISO 294-1. These values are not contractual minimum or maximum limits. Shrinkage is assessed on 60 mm × 60 mm × 2 mm plaques according to ISO 294-4:2018 and varies with melt temperature, mould temperature, holding pressure, and part thickness.
| Property | Typical value | Test standard |
|---|---|---|
| Melt mass-flow rate at 230 °C/2.16 kg | 35 g/10 min | ISO 1133-1:2022 |
| Density | 0.905 g/cm³ | ISO 1183-1:2019 |
| Tensile yield stress at 50 mm/min | 35 MPa | ISO 527-2:2012 |
| Elongation at yield | 8 % | ISO 527-2:2012 |
| Flexural modulus at 2 mm/min | 1500 MPa | ISO 178:2019 |
| Notched Izod impact at 23 °C | 2.5 kJ/m² | ISO 180/A |
| Vicat softening temperature, 10 N | 154 °C | ISO 306:2022 |
| Heat deflection temperature, 0.45 MPa | 100 °C | ISO 75-2/B:2013 |
| Moulding shrinkage, parallel | 1.2–1.6 % | ISO 294-4:2018 |
The notched Izod impact value of 2.5 kJ/m² at 23 °C indicates that the grade is not suitable for impact-dominated parts at sub-zero temperatures. For freezer containers or drop-impact parts below 0 °C, a heterophasic impact copolymer should be evaluated using instrumented impact testing to ISO 6603-2 or ASTM D3763. Creep resistance under continuous load is lower than that of a 12 g/10 min homopolymer because the higher melt flow corresponds to lower molecular weight. The flexural modulus of 1500 MPa supports rigid housewares and closures, but long-term creep in load-bearing designs must be assessed using ISO 899-2 flexural creep data for the final wall section.
Substitution in an existing tool changes pressure, packing, and gate-seal behaviour. The lower melt viscosity reduces injection pressure by approximately 8–15 % in thin-wall tools. Hold pressure should not be reduced by the same proportion because the gate freezes earlier; otherwise, part mass and mechanical properties decline. Packing time may shift by 0.2–0.5 s. A gate seal study mapping part mass against hold time should be run after each grade substitution. Multi-cavity tools with long runner channels benefit from lower pressure drop and better cavity-to-cavity filling balance, but marginal clamp force or worn vents may show increased flash.
Table 2 compares H350FG with class-level values for unfilled polypropylene injection moulding grades. The data are representative polymer-class ranges, not direct grade specifications.
| Property | H350FG homopolymer | 12 g/10 min homopolymer | 8 g/10 min random copolymer | 20 g/10 min impact copolymer |
|---|---|---|---|---|
| Melt mass-flow rate | 35 g/10 min | 12 g/10 min | 8 g/10 min | 20 g/10 min |
| Tensile yield stress | 35 MPa | 36 MPa | 28 MPa | 25 MPa |
| Flexural modulus | 1500 MPa | 1600 MPa | 1000 MPa | 1100 MPa |
| Notched Izod at 23 °C | 2.5 kJ/m² | 3.0 kJ/m² | 6.0 kJ/m² | 15 kJ/m² |
| Vicat softening, 10 N | 154 °C | 155 °C | 140 °C | 150 °C |
These differences mean H350FG is selected where thin-wall flow and cycle time are more important than low-temperature impact toughness or contact clarity. Compared with a random copolymer, H350FG has higher modulus and higher Vicat softening, but lower impact strength and higher haze. Compared with an impact copolymer, it has higher stiffness and lower notched impact. Compared with a 12 g/10 min homopolymer, the main advantage is better thin-wall fill at lower injection pressure; the trade-off is a measurable reduction in notched impact and creep resistance.
Food-contact status is application-specific. The base polypropylene homopolymer can be evaluated against FDA 21 CFR 177.1520 for olefin polymers and against Regulation (EU) No 10/2011 for plastics intended to contact food. Final compliance is determined on the finished article after processing, printing, labelling, and liner addition. Migration testing should follow EN 1186 and EN 13130 series methods for the relevant food simulants. Under REACH Regulation (EC) No 1907/2006, the grade is supplied with safety data sheet information; under RoHS Directive 2011/65/EU, no intentionally added lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above maximum concentration values is declared. Published data for some specific food-contact applications is limited; converter migration and organoleptic trials are required before market release.
Chemical resistance of unfilled homopolymer at 23 °C is generally strong for aqueous acids, alkalis, and salt solutions, but aromatic hydrocarbons, ketones, and chlorinated solvents swell or soften the material. For closures and containers used with aggressive concentrates, stress-cracking resistance should be tested under load to ISO 22088. The grade is not recommended for contact with strong oxidising acids at elevated temperature. This limitation differentiates H350FG from high-density polyethylene in applications where environmental stress-crack resistance is the primary design constraint.
A general-purpose screw with 20:1 to 25:1 L/D, compression ratio 2.5:1, and a clean non-return valve should be used. Barrel zone settings may be: rear 200–210 °C, middle 220–230 °C, front 230–240 °C, nozzle 230–250 °C. Injection velocity is set to produce fill times of 0.2–0.8 s for thin-wall parts. Hold pressure is typically 50–70 % of peak injection pressure. Back pressure should remain at 5–10 bar; screw speed is set from 50–120 rpm depending on screw diameter. Mould water flow should maintain cavity-to-cavity temperature variation below ±2 °C to avoid non-uniform shrinkage and part mass imbalance. Gate diameters for wall thickness 0.8–1.2 mm typically range from 0.6 mm to 1.0 mm. Vent depth for polypropylene homopolymer should not exceed 0.02–0.03 mm to prevent flash while allowing air evacuation at filling end points and weld line positions.
Drying is not normally required for polypropylene homopolymer. If surface moisture is suspected after storage at relative humidity greater than 60 %, pellets should be dried at 80 °C for 2–4 h in a desiccant dryer. Extended residence time at melt temperature should be avoided; if a stoppage exceeds 10 min, barrel temperatures should be reduced or the machine purged. Purging with a lower-MFR polypropylene or a machine-purge compound before shutdown reduces carbonised deposits. The material is not intended for continuous service above 90 °C in air without service-life validation and antioxidant stabilisation; UV stabilisation is required for outdoor exposure.
In co-injection and overmoulding, direct adhesion to EVOH or polyamide is limited without a maleic anhydride-grafted polypropylene tie layer. Trials should be run with the specific tie resin and surface preparation. The grade is not classified as biodegradable; recyclates should be compatible with polypropylene recovery streams.
