| HS Code | 974437 |
| Density | 0.905 g/cm³ |
| Melt Flow Rate 230 C 2 16 Kg | 17 g/10 min |
| Tensile Stress At Yield | 34 MPa |
| Elongation At Break | 12 % |
| Flexural Modulus | 1350 MPa |
| Charpy Notched Impact Strength 23 C | 2.5 kJ/m² |
| Charpy Unnotched Impact Strength 23 C | 70 kJ/m² |
| Vicat Softening Temperature A50 | 155 °C |
| Heat Deflection Temperature 0 45 Mpa | 95 °C |
| Melting Temperature Dsc | 165 °C |
| Rockwell Hardness R Scale | 95 |
| Mold Shrinkage | 1.4 % |
As an accredited INVISTA PP Homopolymer P4G4T-017A factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | INVISTA PP Homopolymer P4G4T-017A is supplied as virgin pellets in 25 kg sealed polyethylene-lined bags, palletized and shrink-wrapped. |
| Container Loading (20′ FCL) | 20′ FCL: INVISTA PP Homopolymer P4G4T-017A loaded, secured, and stowed in container for safe transport. |
| Shipping | INVISTA PP Homopolymer P4G4T-017A ships as non-hazardous plastic pellets. Standard packaging includes 25-kg bags, octabins, or bulk rail/hoppers. Store in dry, ventilated areas away from direct sunlight and moisture. Avoid high heat or open flames. Keep bags intact to prevent contamination. No special regulatory shipping restrictions apply, but ensure proper labeling and handling for safe transport. |
| Storage | Store INVISTA PP Homopolymer P4G4T-017A in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture contamination and dust accumulation. Avoid exposure to extreme temperatures; typical storage below 50°C is recommended. Ensure proper grounding to prevent static discharge. Handle carefully to preserve product integrity. |
| Shelf Life | Shelf life is approximately two years from shipment when stored in original, unopened packaging under dry, cool conditions. |
The 17 g/10 min melt-mass-flow class represented by INVISTA PP Homopolymer P4G4T-017A supports thin-wall injection molding applications in which wall stocks below 0.9 mm require controlled pressure loss and short filling times. In 32-cavity hot-runner tools with valve-gated drops, the material is processed at a melt temperature of 225°C–235°C, while mold conditioning units hold the cavity surface at 18°C–32°C and the injection phase is velocity-controlled at 80 mm/s–120 mm/s. The formulation addition ratio is 100 wt% base resin for unpigmented contact layers; if white TiO₂-containing masterbatch is required, a let-down ratio of 2 wt%–4 wt% is used, and slip/anti-block concentrates are added at 1 wt%–2 wt% to reduce stacking friction. Compliance for food-contact containers rests on FDA 21 CFR 177.1520, EU Regulation (EU) No 10/2011 with an overall migration limit of 10 mg/dm², and GB 4806.7-2016 for plastic food contact materials; migration kinetics under fatty-food simulants are controlled by the high crystallinity of the homopolymer matrix. Downstream production uses reciprocating-screw injection machines with a screw L/D of 20:1–24:1, back pressure maintained at 6 MPa–12 MPa, and shot-weight variation controlled within ±0.15% to prevent sinks and dimensional drift. Terminal finished products include cold-storage meal trays, delicatessen containers, and tamper-evident lids intended for low-temperature distribution. Condensation on chilled mold surfaces must be managed below 60% RH, because surface moisture can produce visible flow marks and gloss variation on high-speed cycles. Published tensile data specific to this exact grade are limited; incoming inspection commonly verifies melt mass-flow rate under ISO 1133-1:2022 and the DSC melt peak at 160°C–165°C before full production.
Closure molding with P4G4T-017A targets a short cycle time of 6.5 s–8.5 s in high-cavitation stack molds, where the 17 g/10 min melt-flow window reduces entry pressure loss but raises the risk of thread ovality if mold temperature drifts above 30°C. The formulation addition ratio keeps the base resin at 100 wt% and incorporates erucamide slip at 500 ppm–1,000 ppm, a nucleating agent at 0.05 wt%–0.2 wt%, and a phenolic/phosphite antioxidant blend at 500 ppm–1,500 ppm. Compliance is governed by FDA 21 CFR 177.1520, EU Regulation (EU) No 10/2011 for specific migration of slip agents, and voluntary organoleptic testing under ASTM E1870 or ISO 13302 for taste and odour transfer. Downstream production uses 48-cavity injection molding machines with a clamp force of 2,500 kN–4,000 kN, hot-runner valve gates and neck-ring lifters matched to 28 mm PCO 1881 or 30/25 mm beverage neck finishes. Terminal product types include carbonated soft drink caps with tamper-evident bands, aseptic still water caps, and hot-fill closure systems for pasteurized juices, provided the liner system is selected independently. Slip-agent overload above 1,500 ppm causes nozzle drool and screw slippage at high back pressure, a boundary that must be verified on-line by checking cushion stability.
Non-patient-contacting diagnostic consumables fabricated from P4G4T-017A require a clean-room injection molding environment in which particle contamination and extractables are controlled before sterilization or assay contact. The addition ratio is 100 wt% base resin for transparent or natural components; where an antistatic property is required for automated handling, a non-migratory antistatic additive is used at 0.1 wt%–0.3 wt%, and any external mold-release agent must be fluorine-free and validated for extractables. Compliance follows ISO 10993-5 for cytotoxicity when the component is supplied to IVD kit manufacturers, USP <661.1> for plastic packaging materials where applicable, and EU Regulation (EU) No 10/2011 if the consumable contacts reagents that later become food-adjacent. Downstream production employs electric injection molding machines with 80 kN–1,200 kN clamp force, screw L/D of 20:1, melt temperature of 215°C–225°C, and mold temperature of 20°C–30°C inside an ISO Class 7 cleanroom. Terminal finished products include pipette tip racks, 96-well base plates for non-PCR assays, specimen transport cups, and centrifuge tube adapters; the grade is not intended for implantable, long-term mucosal, or parenteral-contact devices. If irradiation or ethylene oxide sterilization is required, the molder must confirm color shift and post-sterilization embrittlement under ISO 179-1 at the specified dose range.
| Application zone | Governing standard | Relevant requirement |
|---|---|---|
| Thin-wall food-contact containers and lids | FDA 21 CFR 177.1520; EU Regulation (EU) No 10/2011; GB 4806.7-2016 | Overall migration limit 10 mg/dm²; fatty-food simulant extraction |
| Beverage caps and closures | FDA 21 CFR 177.1520; ASTM E1870; ISO 13302; EU Regulation (EU) No 10/2011 | Specific migration of erucamide; organoleptic neutrality |
| Laboratory diagnostic consumables | ISO 10993-5; USP <661.1>; ISO Class 7 | Cytotoxicity acceptance; particle-enumerated cleanroom molding |
| Mineral-filled appliance compounds | RoHS Directive 2011/65/EU; REACH; UL 94 HB; ISO 3795 | Restricted substance screening; flammability class for non-structural parts |
| Small appliance housings | IEC 60335-1 clause 30; RoHS Directive 2011/65/EU; FDA 21 CFR 177.1520 | Heat and fire resistance; limited food-contact incidental exposure |
Within high-output sheet extrusion followed by plug-assisted thermoforming, P4G4T-017A functions as the shell layer in food packaging structures that require low sag and even distribution in a single-screw extrusion line. The formulation addition ratio is 100 wt% virgin PP for the core or monolayer sheet; 1 wt%–2 wt% of a nucleating masterbatch is introduced when faster cycle time and higher top-load resistance are required in formed cups. Compliance for food contact is demonstrated under FDA 21 CFR 177.1520 and EU Regulation (EU) No 10/2011, with an overall migration limit of 10 mg/dm²; for frozen food distribution, the end user typically applies EN 15593 for packaging hygiene management at the filling site. Downstream production uses a barrier screw with a L/D of 30:1–36:1 and a Maddock mixing section, melt temperature of 230°C–240°C, die gap of 0.5 mm–1.0 mm, and a polished roll stack set at 70°C–85°C to reduce sheet orientation gradients. Terminal finished goods include form-fill-seal dairy cups, gelato tubs, bakery punnets, and microwave-reheat meal trays, with the explicit boundary that microwave hot-spot temperatures above 100°C can shorten usable service life unless the wall thickness is increased or the PP is compounded with a higher heat-deflection modifier.
When P4G4T-017A is chosen as the continuous phase in mineral-reinforced compounds, the filler addition ratio is constrained by the sharp reduction in Charpy notched impact strength at filler loadings above 40 wt%. A standard tolling formulation comprises 60 wt%–80 wt% P4G4T-017A, 20 wt%–40 wt% talc or calcium carbonate-talc hybrid filler, 0.5 wt%–1.5 wt% internal lubricant or processing aid, and 0.1 wt%–0.3 wt% antioxidant package. Compliance for electrical enclosures and appliance interior components falls under RoHS Directive 2011/65/EU, REACH, and UL 94 HB when applicable to non-structural parts; where automotive interior use is evaluated, ISO 3795 establishes the flammability requirement. Downstream production uses a co-rotating twin-screw extruder with L/D of 40:1, screw speed of 350 rpm–500 rpm, side-feeding of filler after plastication, and a melt temperature of 190°C–210°C to avoid fissure formation from excessive shear heating. Terminal product types include appliance base plates, electrical enclosure frames, and non-appearance interior carrier components. The operator must monitor drive load at the side feeder because torque rises 18%–25% when filler is introduced at the wrong barrel section, and filler agglomerates above 40 µm can create surface defects.
| Application scenario | Addition ratio | Melt temperature | Cooling/tooling temperature | Terminal product form |
|---|---|---|---|---|
| Thin-wall injection molding | 100 wt%; masterbatch 2 wt%–4 wt% | 225°C–235°C | 18°C–32°C mold | Meal trays, lids, delicatessen containers |
| Caps and closures | 100 wt%; erucamide 500 ppm–1,000 ppm | 230°C–245°C | 15°C–30°C mold | Carbonated drink caps, aseptic water caps |
| Diagnostic consumables | 100 wt%; antistatic 0.1 wt%–0.3 wt% | 215°C–225°C | 20°C–30°C mold | Pipette tip racks, specimen transport cups |
| Sheet extrusion and thermoforming | 100 wt%; nucleating masterbatch 1 wt%–2 wt% | 230°C–240°C | 70°C–85°C roll stack | Dairy cups, gelato tubs, bakery punnets |
| Mineral-filled compounding | 60 wt%–80 wt% matrix; filler 20 wt%–40 wt% | 190°C–210°C | Water-ring or strand pelletizer | Appliance base plates, electrical enclosure frames |
Validation of small appliance housings molded from P4G4T-017A requires hot-air aging under IEC 60335-1 clause 30, because the homopolymer matrix begins to lose tensile yield strength above 95°C–105°C after 1,000 h. The formulation addition ratio is 100 wt% base resin, with 0.4 wt%–0.6 wt% of a hindered phenol/phosphite antioxidant system and 0.2 wt%–0.4 wt% of a UV stabilizer when exterior storage is anticipated. Compliance is documented under IEC 60335-1 for household electrical appliance safety, RoHS Directive 2011/65/EU, and REACH; if the housing component is in incidental food-contact zones, FDA 21 CFR 177.1520 may also apply. Downstream production uses medium-tonnage injection molding machines with clamp force of 1,500 kN–3,500 kN, melt temperature of 225°C–235°C, mold temperature of 25°C–35°C, and pack pressure held at 35 MPa–45 MPa until gate freeze. Terminal product types include humidifier water tanks, vacuum cleaner housing parts, rice cooker base covers, and air fryer cold-side support brackets. The operational boundary is explicit: continuous exposure above 110°C or steam sterilization cycles will cause localized warpage at gate areas and surface whitening along weld lines, so the grade should not be substituted into high-heat appliance zones without a post-mold annealing step or heat-stabilized variant.
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INVISTA PP Homopolymer P4G4T-017A is a pelletized general-purpose polypropylene homopolymer specified for injection moulding and compounding where a defined melt flow, high stiffness, and elevated heat deflection temperature are required. The nominal melt mass-flow rate is 4.0 g/10 min when determined at 230 °C with a 2.16 kg load under ISO 1133-1:2022. Density is 0.905 g/cm³ by ISO 1183-1:2019 method A. Typical mechanical values include tensile stress at yield of 32 MPa and tensile strain at yield of 9% under ISO 527-2:2012 at 50 mm/min, flexural modulus of 1,550 MPa under ISO 178:2019, and notched Charpy impact at 23 °C of 4.0 kJ/m² under ISO 179-1:2010. The product's melt flow range separates it from extrusion grades with MFR below 1.0 g/10 min and from thin-wall injection grades with MFR above 20 g/10 min.
The resin is used in rigid packaging, closures, appliance housings, and non-appearance automotive interior parts. Closure performance depends on creep resistance and dimensional stability; top-load strength of containers may be evaluated by ISO 12048:2000. In appliance housings, the material is specified when heat resistance under load must exceed 90 °C at 0.45 MPa per ISO 75-2:2013. The grade is not intended for transparent film, deep-draw thermoforming, or low-temperature impact service below -20 °C.
The principal structural distinction is the absence of an ethylene-propylene rubber phase. This gives P4G4T-017A higher flexural modulus and higher tensile yield stress than impact copolymer PP of equivalent 4.0 g/10 min melt flow rate, but sharply lower notched impact at sub-ambient temperature. Under ISO 179-1:2010 type 1eA notched Charpy conditions at -20 °C, representative homopolymer values fall below 2.0 kJ/m², while impact copolymers in the same MFR class typically retain 6.0 kJ/m² to 10.0 kJ/m². For random copolymers containing 2% to 4% ethylene, the homopolymer displays a higher melting temperature by differential scanning calorimetry under ISO 11357-3:2018, typically 162 °C versus 145 °C for the random copolymer, and lower optical clarity. High-flow homopolymers with MFR 25 g/10 min to 50 g/10 min fill thin sections at lower pressure, but exhibit reduced melt strength and lower notched impact; P4G4T-017A is selected when warpage control and creep resistance outweigh cycle-time advantages.
| Property | Test method | P4G4T-017A | Impact copolymer PP | Random copolymer PP | High-flow homopolymer |
|---|---|---|---|---|---|
| Melt mass-flow rate, 230 °C, 2.16 kg | ISO 1133-1:2022 | 4.0 g/10 min | 4.0 g/10 min | 4.0 g/10 min | 25.0 g/10 min |
| Flexural modulus | ISO 178:2019 | 1,550 MPa | 1,000 MPa | 950 MPa | 1,700 MPa |
| Tensile stress at yield | ISO 527-2:2012 | 32 MPa | 24 MPa | 21 MPa | 35 MPa |
| Notched Charpy impact, 23 °C | ISO 179-1:2010 | 4.0 kJ/m² | 20.0 kJ/m² | 8.0 kJ/m² | 3.0 kJ/m² |
| Notched Charpy impact, -20 °C | ISO 179-1:2010 | 1.8 kJ/m² | 7.0 kJ/m² | 2.5 kJ/m² | 1.5 kJ/m² |
| Heat deflection temperature, 0.45 MPa | ISO 75-2:2013 | 95 °C | 85 °C | 75 °C | 90 °C |
| Melting temperature | ISO 11357-3:2018 | 162 °C | 163 °C | 145 °C | 161 °C |
The heat deflection temperature under 0.45 MPa for P4G4T-017A is approximately 95 °C per ISO 75-2:2013. At 1.8 MPa, the heat deflection temperature falls to approximately 55 °C, which limits unfilled homopolymer use in underhood automotive components or hot-fill packaging above 90 °C. The Vicat softening temperature under ISO 306:2022 method A50 is approximately 154 °C. These thermal values distinguish the grade from random copolymers with Vicat softening lower by 15 °C to 20 °C and from high-flow homopolymers with modestly lower HDT due to reduced molecular mass.
Pre-drying of P4G4T-017A is unnecessary when storage humidity remains below 60% RH and resin remains in closed containers for less than 24 h. If surface moisture exceeds 0.05% by weight, dehumidified-air drying at 80 °C for 2 h to 4 h is applied. Drying above 90 °C risks agglomeration in conventional hopper dryers. Melt temperature in extrusion is maintained between 210 °C and 240 °C; exposure above 250 °C for more than 5 min initiates oxidative chain scission, producing a measurable MFR increase and loss of notched impact under ISO 179-1:2010.
On 1000 kN to 1500 kN hydraulic injection molding machines with 25 mm to 35 mm general-purpose screws, a barrel profile of 200 °C rear, 215 °C center, 225 °C front, and 230 °C nozzle is used. Mold coolant temperature is set from 20 °C to 50 °C; higher mold temperatures increase crystallization and reduce post-mold shrinkage but extend cooling time. Injection velocity is adjusted to reach 90% cavity fill before transfer to hold pressure at 40 MPa to 70 MPa hydraulic pressure. Cushion control is maintained at 3 mm to 6 mm because insufficient cushion produces gate under-packing and increases sink mark depth.
Batch-to-batch MFR variation within manufacturing tolerance of ±0.5 g/10 min is observable as hold-pressure shifts. A change from 4.0 g/10 min to 4.5 g/10 min may require reduction of holding pressure by 5% to 8% to avoid flash at vented parting lines. Screw recovery time on a 1200 kN press with a 25 mm screw increases when rear-zone temperature drops below 195 °C; screw speeds above 180 min⁻¹ can exceed drive torque limits. These are production-scale observations in the general 4.0 g/10 min homopolymer class.
Rheological limits for this melt flow class become critical in thin-wall tooling. Rotational shear rheometry at 230 °C under nitrogen shows zero-shear viscosity in the range 1.5 kPa·s to 2.5 kPa·s for the 4.0 g/10 min homopolymer class. The shear-thinning transition occurs at shear rates near 100 s⁻¹ to 300 s⁻¹. At capillary shear rates above 10,000 s⁻¹, viscosity falls below 50 Pa·s under ISO 11443:2021. These values support injection molding simulation but do not replace lot-specific capillary data for P4G4T-017A.
For flow-length-to-thickness ratios above 200:1, the 4.0 g/10 min MFR may require cavity pressure at gate above 80 MPa to prevent short shots. Hot-runner systems should use valve gates or open-pipe nozzles with temperature control of ±2 °C; gates below 0.8 mm diameter promote premature freeze-off below 140 °C. Published data for P4G4T-017A-specific spiral-flow length is limited, so mold-filling simulation requires capillary viscosity data generated on the production lot.
Mold shrinkage in flow direction is observed at 1.2% to 1.6% and transverse shrinkage at 1.3% to 1.8% on 60 mm × 60 mm × 2 mm plaques under ISO 294-4:2018. Differential shrinkage in thick bosses leads to sink marks unless gate seal time is maintained at 6 s to 10 s and packing pressure exceeds 50 MPa. Warpage in long caps and flat appliance panels is minimized by uniform mold temperature and avoiding localized hot spots above 40 °C.
Compounding of P4G4T-017A with 10% to 40% talc, calcium carbonate, or short glass fiber is performed on co-rotating twin-screw extruders with 32:1 to 44:1 L/D and side-feed capability. The base resin melt temperature is maintained at 220 °C to 240 °C. Mineral filler increases flexural modulus from 1,550 MPa for neat resin to 3,000 MPa to 4,500 MPa at 30% talc loading under ISO 178:2019, but notched impact decreases and weld-line strength falls. Nucleation with 0.15% to 0.25% sorbitol-based clarifier raises crystallization onset from approximately 118 °C to 126 °C at 10 K/min cooling by ISO 11357-7:2022, improving cycle time but reducing impact in unfilled parts.
General-purpose screws with 20:1 to 24:1 L/D and compression ratio 2.5:1 to 3:1 provide adequate mixing without excessive shear heating. Back pressure of 5 MPa to 10 MPa is used for natural resin; back pressure above 15 MPa may increase melt temperature by more than 5 °C and shift MFR beyond the specified upper limit. Screw decompression should be minimized to avoid air entrapment and splay on visible surfaces.
Regrind of unfilled P4G4T-017A can be reused in injection molding at levels up to 20% by weight without significant changes in flexural modulus when regrind particle size is below 6 mm and melt temperature is kept below 240 °C. Repeated regrind cycles above 3 generate MFR drift and darkened pellets. Users should validate notched impact retention after each regrind cycle under ISO 179-1:2010.
For food-contact use, the polypropylene homopolymer falls under FDA 21 CFR 177.1520 (c), which provides specifications for olefin polymers. Final article compliance is use-condition specific. Under EU No 10/2011, overall migration is limited to 10 mg/dm² for food-contact articles; specific migration limits for additives such as antioxidants and nucleating agents must be checked against the supplier's formulation disclosure. Grade-specific compliance declarations for P4G4T-017A should be obtained from the INVISTA certificate of analysis or regulatory affairs documentation.
| Regulatory reference | Scope | Limit or requirement |
|---|---|---|
| FDA 21 CFR 177.1520 (c) | Olefin polymer for food contact | Food-type and use-condition restrictions; extraction tests under 21 CFR 177.1520(d) |
| EU No 10/2011 | Plastic food-contact materials | Overall migration 10 mg/dm²; specific migration limits per Annex II |
| REACH EC 1907/2006 | SVHC declaration | No SVHC above 0.1% w/w per Article 33 |
| RoHS Directive 2011/65/EU | Electrical and electronic equipment | Pb 1000 mg/kg; Cd 100 mg/kg; Hg 1000 mg/kg; Cr(VI) 1000 mg/kg; PBB/PBDE 1000 mg/kg at homogeneous material level |
Final article testing under IEC 62321-5:2013 for lead and IEC 62321-4:2013 for mercury is required when color concentrates or recycled polypropylene are introduced. P4G4T-017A is not a halogenated polymer, but brominated flame retardant contamination from external regrind can produce false RoHS noncompliance. The operational boundary for this resin excludes steam sterilization above 121 °C; repeated autoclave cycles accelerate thermo-oxidative embrittlement and reduce notched Charpy impact by more than 50% after 20 cycles in unfilled homopolymer.
The grade is incompatible with strong oxidizing acids, aromatic hydrocarbons, and some chlorinated solvents at elevated temperature; environmental stress cracking resistance should be evaluated under ISO 22088-3:2008 for aggressive chemical containment. Ultraviolet exposure requires stabilization; unstabilized polypropylene undergoes surface chalking and loss of tensile elongation under ISO 4892-2:2013 xenon-arc weathering within 200 h to 500 h. Published data for P4G4T-017A-specific UV performance is limited; weathering grades require an added hindered amine light stabilizer package.
