| HS Code | 759210 |
| Density | 0.9 g/cm³ |
| Melt Flow Rate 230 C 2 16 Kg | 22 g/10 min |
| Tensile Strength At Yield | 35 MPa |
| Elongation At Break | 50% |
| Flexural Modulus | 1500 MPa |
| Izod Impact Strength Notched At 23 C | 3 kJ/m² |
| Rockwell Hardness | 100 R |
| Heat Deflection Temperature 0 45 Mpa | 100 °C |
| Vicat Softening Point A50 | 155 °C |
| Melting Point | 165 °C |
As an accredited MARPOL PP Homopolymer H 220 M40 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | MARPOL PP Homopolymer H 220 M40 is supplied in 25 kg multi-wall paper bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL of MARPOL PP Homopolymer H 220 M40, packed in bags, secured and containerized for safe transport. |
| Shipping | MARPOL PP Homopolymer H 220 M40 ships as non-hazardous plastic resin in bulk bags, lined containers, or hopper trucks. Keep pellets dry and away from moisture, heat, and direct sunlight. No marine pollutant classification under MARPOL; standard handling, clean equipment, and proper labeling ensure safe transport. |
| Storage | Store MARPOL PP Homopolymer H 220 M40 in a cool, dry, well-ventilated area, away from direct sunlight, heat, open flames, and ignition sources. Keep containers tightly sealed to prevent moisture absorption and contamination. Maintain stable room temperature and avoid stacking excessively. Under proper conditions, shelf life is typically twelve months from manufacture date. |
| Shelf Life | Store in original unopened packaging, away from heat and sunlight. Shelf life is typically 2 years from delivery date. |
When MARPOL PP Homopolymer H 220 M40 is processed on high-speed thin-wall injection molding lines with 32- to 48-cavity hot-runner tools, the controlling variable is not peak injection pressure but melt-mass-flow-rate consistency within the 22 g/10 min class under ISO 1133-1:2022. Melt temperatures are held between 230 °C and 250 °C, mold temperatures between 20 °C and 40 °C, and injection speeds between 160 mm/s and 250 mm/s on electric or hybrid machines with screw diameters of 35–60 mm. On cup and delicatessen-container tools with nominal wall sections of 0.3–0.8 mm, cavity pressure transducers indicate that melt temperature deviation beyond ±5 °C produces visible short-shot or flash variation in the lower half of the injection window; this is the primary process conflict, more immediate than spiral flow length. Pre-drying at 80 °C for 2–4 h in a desiccant dryer is applied when raw-material storage exceeds 60% relative humidity because surface moisture on high-gloss food-contact surfaces generates splay marks that cannot be corrected by raising back pressure alone. Food-contact compliance rests on virgin-resin use at 100 wt% for natural, unpigmented articles under FDA 21 CFR 177.1520, EU Regulation No 10/2011, and GB 4806.7-2016. When pigmented masterbatch is required, the formulation is typically 94–98 wt% H 220 M40, 2–6 wt% polyolefin-based color masterbatch, and 0.05–0.15 wt% processing aid, with migration testing performed according to the final food-simulant assignment under EU 10/2011. The material is not specified for retort-grade containers requiring sustained sterilization above 100 °C because the heat distortion temperature of homopolymer under 0.45 MPa by ISO 75-2/B approaches that process threshold without sufficient margin. Downstream production uses reciprocating screw injection molding with screw L/D of 18:1 to 22:1 and compression ratio of 2.2:1 to 2.8:1. Hot-runner valve gates are preferred for multicavity cup tools, while side gates of 1.0–1.5 mm are common on delicatessen containers to reduce gate blush. Terminal product types include dairy single-serve cups, delicatessen containers, fruit trays, injection-molded lids, and disposable nutritional bowls.
| Regulation or method | Scope | Applied condition |
|---|---|---|
| FDA 21 CFR 177.1520 | U.S. olefin polymer food-contact authorization | Virgin PP homopolymer; density 0.90–0.91 g/cm³ per ISO 1183-1:2019 |
| EU Regulation No 10/2011 | EU food-contact plastics | Overall migration limit 10 mg/dm² according to assigned food simulant |
| GB 4806.7-2016 | China food-contact plastic materials | Total migration and sensory checks on final article |
| ISO 1133-1:2022 | Melt mass-flow rate | 22 g/10 min at 230 °C/2.16 kg |
| ISO 1183-1:2019 | Density | 0.90–0.91 g/cm³ typical for PP homopolymer |
On closure tooling with 48 to 96 cavities operating at dry cycle times below 4.5 s, a homopolymer flow rate of 22 g/10 min permits filling of bridge seals and plug seals without excessive core deflection, but the molecular orientation carried into the living hinge is managed by staged fill speed rather than by raising melt temperature. Melt temperature for closures is set lower than for thin-wall packaging, between 200 °C and 230 °C, while mold temperature is held at 15–30 °C with high-turbulence water lines through each cavity block. The process conflict is the transition from velocity-controlled filling to pressure-limited packing; cavity pressure curves must begin the V/P switch before the hinge centerline solidifies, otherwise differential shrinkage across the 0.4–0.8 mm hinge web results in whitening or premature fracture. Base-resin loading is between 94 wt% and 97 wt%, with slip/antiblock masterbatch at 1.5–4.0 wt%, nucleating agent masterbatch at 0.1–0.3 wt%, and organic or inorganic pigment masterbatch at 0.5–2.0 wt%. Nucleating content is kept below 0.3 wt% because higher levels raise flexural modulus but reduce hinge endurance in repeated flex testing. Compliance for beverage and dairy closures is documented under FDA 21 CFR 177.1520, EU Regulation No 10/2011, and RoHS 2011/65/EU for restricted substances in non-food outer layers. Downstream production uses high-cavitation injection molding with unscrewing or collapsing core tooling for threaded closures; cycle times commonly range from 5 s to 9 s on electric machines with rotary platen devices. Terminal product types include tamper-evident screw caps for still water and dairy products, flip-top caps for personal care and household products, and dispensing overcaps for sauces and condiments.
In production of stackable household storage boxes on 400–600 t toggle-clamp injection molding machines, the material is selected for its ability to fill long, flat side walls without requiring melt temperatures above 250 °C. The recommended screw is a general-purpose polypropylene profile with L/D of 20:1 and check-ring travel monitored for wear; screw recovery time is generally between 8 s and 14 s on accumulator-equipped hydraulic machines. Injection velocity is staged from 40 mm/s at the sprue to 120 mm/s across the side walls to prevent jetting and flow marks. Mold temperature is held at 25–50 °C through parallel water circuits. Flow-front hesitation around molded-in carry handles is addressed by increasing local wall stock from 2.0 mm to 2.8 mm; this adjustment is derived from mold trials on two-cavity tooling where handles created a fill-rate restriction. For non-food household articles, mechanical safety for children’s use is governed by EN 71-3 migration limits for toys; for general consumer storage, the formulation must satisfy REACH Annex XVII and RoHS 2011/65/EU restricted-substance limits. If used for food storage, only virgin resin under EU 10/2011 and FDA 21 CFR 177.1520 is acceptable. The compound is typically 90–95 wt% H 220 M40, 5–10 wt% talc-filled polypropylene masterbatch to reduce warpage, and 1–3 wt% color masterbatch; if outdoor use is specified, 0.3–0.6 wt% UV stabilizer masterbatch is added. Parts are injected, cooled, and ejected with forced air; large flat covers are transferred to post-mold cooling fixtures before stacking. Terminal product types include modular storage crates, pantry bins, under-bed boxes, opaque drawer organizers, and stackable utility containers.
The grade is processed on electric injection molding machines in ISO Class 8 cleanrooms with melt temperatures of 220–250 °C and mold temperatures of 20–40 °C; mold release agents are excluded because residues interfere with subsequent sterilization and with surface tension-dependent diagnostic reactions. For laboratory disposables that do not require autoclavability, homopolymer provides sufficient stiffness for thin walls and dimensional control in multi-cavity pipette tip racks. Material selection is made against USP Class VI biological reactivity under USP General Chapter 88, ISO 10993-5:2009 for cytotoxicity, and ISO 10993-10:2013 for irritation and skin sensitization when the finished device is classified as a medical device component. Published multi-dose gamma-irradiation data for this specific grade is limited; validation at the finished-device level is required before selecting an additive package. For gamma-sterilized articles, the formulation is 88–95 wt% H 220 M40, 5–12 wt% radiation-stabilizing polyolefin masterbatch, and 0.5–2 wt% high-purity color masterbatch. For non-sterile laboratory items, natural resin is processed at 100 wt% without additives because additive leaching into test media is excluded. Autoclavable applications at 121 °C are not recommended for homopolymer under sustained load; heat distortion performance under 0.45 MPa according to ISO 75-2/B does not provide a sufficient safety margin for repeated autoclave cycling. Downstream production includes injection molding after raw-material drying only when packaging integrity is compromised; short shots caused by moisture are less common than contamination from external handling. Terminal product types include pipette tip racks, specimen transport trays, cytology cassettes, waste-bag frames, and non-sterile reagent reservoirs.
For non-load-bearing interior brackets, air vents, and wiring clips, the material is specified against ISO 527-2:2012 tensile properties and ISO 178:2019 flexural modulus because the finished parts are not aesthetics-critical but must survive clip insertion forces and cabin temperatures up to 85 °C. On 120–250 t hydraulic machines with heated sprue bushings, melt temperature is set at 230–250 °C and mold temperature at 30–60 °C to reduce internal stress; high mold temperature is used only when post-mold dimensional checks show warpage greater than 0.5 mm across a 100 mm unsupported span. The production bottleneck is not fill speed but ejection after cooling: polypropylene homopolymer has a relatively high mold shrinkage of 1.0–1.5%, and premature ejection creates pin push marks on untextured back surfaces. Material compliance is documented under REACH Regulation (EC) No 1907/2006, RoHS 2011/65/EU including Annex II restricted substances, and IMDS reporting for vehicle data systems; automotive interior odor and fogging requirements are evaluated under VDA 270 and VDA 278 when required by the OEM. The compound is 75–90 wt% H 220 M40, 10–25 wt% talc-filled masterbatch for stiffness, and 1–3 wt% carbon black masterbatch for UV stabilization; for parts requiring improved low-temperature impact, ethylene-propylene impact copolymer addition is made only after compatibility testing because large additions suppress modulus and mask the grade’s MFR advantage. Downstream process parameters include back pressure of 5–10 bar and holding pressure adjusted to gate-seal time determined by cavity pressure sensors. Terminal product types are HVAC air-vent louvers, wiring harness clips, snap-fit trim brackets, fuse-box carriers, and battery transport spacers; high-voltage enclosure applications requiring UL 94 V-0 are outside the material’s certified performance envelope.
Paint pail production on 800–1,000 t hydraulic machines exposes the high-flow homopolymer to thick wall sections from 2.5 mm to 4.0 mm, where the primary process conflict is not cavity filling but the management of differential shrinkage between the pail wall and the heavy stacking rim. Mold temperature is held at 20–40 °C, while holding pressure is ramped in three stages over 6–10 s to ensure gate seal before solidification of the rim. Without staged holding, the rim pulls away from the mold surface and produces ovality exceeding 1.0 mm on a 300 mm diameter opening, detected with a go/no-go ring gauge on the production line. Melt temperature is set at 210–240 °C; higher temperatures lower viscosity but increase total cooling time and extend cycle time by 4–8 s. For pails intended for transport of liquids and viscous chemical products, the container may be certified under UN 1H2 non-removable-head plastics packaging provisions, with stack testing according to ISO 2234, drop testing according to ISO 2248, and vibration testing according to ISO 2247. Food-contact pails must additionally meet EU 10/2011 and FDA 21 CFR 177.1520. For outdoor exposure, UV stabilization is specified and validated by ISO 4892-2 accelerated weathering. The formulation for pigmented pails is 92–96 wt% H 220 M40, 3–6 wt% color masterbatch, and 0.2–0.5 wt% antioxidant/UV stabilizer masterbatch. For antistatic products used near solvent vapors, 2–5 wt% conductive carbon black masterbatch is added, but surface resistivity and discharge time must be validated on the finished pail because wall thickness and carbon black dispersion create lot-to-lot variation. Downstream equipment includes reciprocating screw injection machines with shot capacity of at least 1,500 g for 20 L pails; cooling time dominates the cycle. Terminal product types include 1 L–20 L paint pails, adhesive pails, industrial cleaning-product drums, and reusable logistics boxes with interlocking lids.
Competitive MARPOL PP Homopolymer H 220 M40 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618136850665 or mail to admin@ascent-chem.com.
We will respond to you as soon as possible.
Tel: +8618136850665
Email: admin@ascent-chem.com
Flexible payment, competitive price, premium service - Inquire now!
MARPOL PP Homopolymer H 220 M40 is a controlled-rheology isotactic polypropylene grade supplied as free-flowing cylindrical pellets. The ISO 1043-1 material designation is PP-H, with the homopolymer architecture producing a semi-crystalline matrix of approximately 50–60 % crystallinity after cooling at conventional injection-moulding rates. The resin incorporates a nucleation additive and a balanced antioxidant stabiliser package; the nucleation system raises the onset crystallization temperature, shortens cycle time, and reduces post-moulding shrinkage anisotropy in unfilled articles. The published melt mass-flow rate of 40 g/10 min under ISO 1133-1 conditions of 230 °C and 2.16 kg places the grade in the high-flow homopolymer class. Density measured by ISO 1183-1 is 0.905 g/cm³, and tensile stress at yield determined by ISO 527-2/1A/50 is 34 MPa. These characteristics position the material for rapid filling of thin-walled tools, multi-cavity closures, appliance housings, and technical components with section thickness below 1.5 mm.
The melt flow rate is not a single fixed value; release testing is conducted against lot-average control windows. The high-flow characteristic reduces injection pressure by lowering melt viscosity, but it also limits molecular orientation and ambient impact resistance. The tensile and flexural data in the following table are typical lot-average values reported by the material supplier and should not be interpreted as guaranteed lot-release minima.
| Property | Test Standard | Typical Value |
|---|---|---|
| Melt mass-flow rate, 230 °C/2.16 kg | ISO 1133-1 | 40 g/10 min |
| Density | ISO 1183-1 | 0.905 g/cm³ |
| Tensile stress at yield | ISO 527-2/1A/50 | 34 MPa |
| Tensile elongation at yield | ISO 527-2/1A/50 | 8 % |
| Flexural modulus | ISO 178 | 1650 MPa |
| Rockwell hardness, R scale | ISO 2039-2 | 95 |
| Linear mould shrinkage after 48 h | ISO 294-4 | 1.4–1.8 % |
| Notched Izod impact at 23 °C | ISO 180/A | 2.5 kJ/m² |
| Heat deflection temperature, 0.45 MPa | ISO 75-2/B | 105 °C |
| Vicat softening temperature, 10 N | ISO 306/A50 | 155 °C |
The flexural modulus of 1650 MPa obtained under ISO 178 is higher than many unpigmented PP-H grades of equivalent flow. This is attributable to the nucleating agent, which increases lamellar thickness and effective crystallinity. The notched Izod impact value of 2.5 kJ/m² at 23 °C under ISO 180/A reflects the inherent low-energy fracture mode of isotactic homopolymer polypropylene. At sub-zero temperatures the impact strength falls steeply; the ductile-to-brittle transition for unprotected homopolymer is typically between 0 °C and 5 °C. Published data for this specific configuration below 0 °C is limited.
Processing on reciprocating-screw injection-moulding machines with L/D ratios between 20:1 and 24:1 has been reported with melt temperatures from 220 °C to 250 °C and mould temperatures from 20 °C to 50 °C. The high-flow profile permits lower hydraulic clamp-force per projected area; for multi-cavity closure tools with a flow length of 120 mm and wall thickness of 1.0 mm, filling pressures of 60–100 MPa are typical. Screw back pressure should be maintained between 0.5 MPa and 1.0 MPa to prevent excessive shear heating without creating screw recovery instability. Higher back pressure increases melt temperature and narrows the process window. The cushion should be set at 2–5 mm to maintain packing consistency. Demoulding is aided by the nucleated crystalline structure, which reduces surface tack and allows stable ejection at lower mould temperatures than non-nucleated homopolymer grades. Hot-runner temperatures should be maintained between 230 °C and 250 °C; valve-gate tips below 0.8 mm can produce premature freeze-off when the injection speed is too low. On a 150-t injection-moulding machine with a 40 mm screw, intermittent short shots have been observed when barrel residence time exceeded 10 min at 245 °C, indicating molecular weight loss.
Moisture uptake in polypropylene is generally low; this grade is packaged with a moisture content below 0.05 %. Pre-drying is not normally required if bags are undamaged and ambient relative humidity is below 60 %. When storage has exceeded 6 months or relative humidity exceeds 60 %, drying at 80 °C for 2–4 h in a desiccant dryer is a common release measure. The practical upper melt temperature is 270 °C; extended hold-up above 280 °C initiates chain scission, decreases melt viscosity, and can raise the melt flow rate beyond the lot-release limit while generating aldehydes and ketones. The resulting odour and discoloration are irreversible. Reground material can be added at levels of 20–30 % by weight without eliminating the nucleation effect, but repeated heat histories at 240 °C shift the molecular weight distribution and reduce notched impact strength.
Thin-wall containers and disposable cutlery often use injection-speed setpoints above 250 mm/s to achieve cavity filling before the flow front freezes. Under these conditions, the apparent shear rate in a 1.0 mm flow channel can approach 10,000 s⁻¹, and the high-flow homopolymer melt exhibits shear-thinning with a power-law index below 0.4. The reduction in shear viscosity is beneficial for pressure loss, but high shear rates also generate viscous dissipation that raises local melt temperature. In hot-runner manifolds with 0.8 mm valve-gate nozzles, local temperature excursions above 250 °C have been reported when injection speed exceeds 300 mm/s. Such excursions can be managed by using reverse-taper nozzle tips, minimising residence time, and setting transfer from velocity to pressure control just before volumetric fill. Packing pressure should be set at 50–70 % of peak injection pressure for parts with wall thickness below 1.2 mm; higher packing can entrap internal stress and produce warpage after ejection.
In comparison with propylene–ethylene random copolymers, H 220 M40 exhibits lower transparency, higher heat deflection temperature, and lower impact strength. Random copolymers typically shift the ductile-to-brittle transition below −20 °C, whereas homopolymer PP-H remains brittle near 0 °C unless impact modification is added. The flexural modulus of random copolymers is usually 900–1200 MPa, significantly lower than the 1650 MPa quoted for this nucleated homopolymer. Against propylene–ethylene impact copolymers, H 220 M40 offers higher flow and faster crystallisation but lower multi-axial impact resistance at ambient and sub-ambient temperatures. Impact copolymers with an ethylene-propylene rubber dispersion can achieve notched Izod values in excess of 10 kJ/m² at 23 °C, whereas H 220 M40 is specified at 2.5 kJ/m². The grade is therefore selected for rigidity, heat resistance, and cycle-time reduction rather than ductile toughness. Within the same producer’s homopolymer portfolio, the H 220 M40 code differentiates additive package and rheology from lower-flow injection grades; a lower-flow homopolymer may show higher tensile yield stress but requires higher mould temperature and injection pressure. Published data for the same producer’s full portfolio is limited, so direct property comparisons should be confirmed with lot-specific data.
The supplier documentation for H 220 M40 lists food-contact suitability under Commission Regulation (EU) No 10/2011 and 21 CFR 177.1520. The testing matrix below is drawn from the material’s regulatory information sheet. Users of the grade must conduct end-use compliance testing because actual additive migration depends on contact time, temperature, and food simulant. For electrical applications, the unfilled homopolymer is usually classified UL 94 HB at 1.5 mm; it is not a self-extinguishing grade and is not suitable for live parts requiring V-2 or V-0 behaviour.
| Regulatory Domain | Standard/Code | Qualification Criterion |
|---|---|---|
| Food-contact materials, European Union | Commission Regulation (EU) No 10/2011 | Overall migration ≤ 10 mg/dm² for assigned polyolefin food simulants |
| Food-contact polymers, United States | 21 CFR 177.1520 | Olefin polymers may be used subject to extractive limits and use conditions |
| REACH SVHC content | Regulation (EC) No 1907/2006 | SVHC content < 0.1 % w/w per supplier declaration |
| RoHS hazardous substances | Directive 2011/65/EU | Pb, Hg, Cd, Cr6+, PBB, PBDE below homogeneous material limits |
| Flammability classification | UL 94 | HB at 1.5 mm thickness reported for unfilled homopolymer PP |
Long-term outdoor exposure without stabilisation results in UV-initiated carbonyl formation, surface micro-cracking, and tensile strength loss. The grade contains no carbon black or hindered amine light stabiliser in its standard formulation, so outdoor service is outside the qualified application envelope. Copper, copper alloys, and manganese ions can catalyse thermal-oxidative degradation of polypropylene; inserts made from these materials must be coated or used only with antioxidant overload. Aromatic mineral oils and some chlorinated solvents can swell or stress-crack polypropylene. The upper continuous-use temperature for unstabilised homopolymer PP is typically 90 °C; intermittent peaks above 100 °C are possible only under low mechanical load. These boundaries are not unique to H 220 M40 but are inherent to the homopolymer chemistry.
Release testing for melt flow-rate variation is typically conducted on two samples per reactor lot with control limits of ±1.5 g/10 min around the specified target. Nucleation efficiency is monitored indirectly through flexural modulus and shrinkage data. Lot-to-lot colour shift is controlled by CIELAB delta E limits below 0.5. Users compounding pigments at the press should pre-disperse liquid colour in polypropylene carrier resin to avoid screw slip. Published data for this specific configuration is limited for inter-lot variance across extended campaigns; converters should establish incoming lot acceptance criteria on the basis of statistical process-control data collected over five lots. For applications requiring food-contact certificates, a written compliance letter should be obtained from the supplier for each lot.
