| HS Code | 355383 |
| Product | MOPLEN PP HP400H |
| Polymertype | Polypropylene Homopolymer |
| Density | 0.900 g/cm³ |
| Meltflowrate | 3.0 g/10 min (230°C, 2.16 kg) |
| Tensilestressatyield | 35 MPa |
| Elongationatyield | 10% |
| Flexuralmodulus | 1450 MPa |
| Rockwellhardness | R-95 |
| Heatdeflectiontemperature | 100°C (0.45 MPa) |
| Vicatsofteningpoint | 155°C |
As an accredited MOPLEN PP HP400H factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | MOPLEN PP HP400H is supplied in 25 kg polyethylene-lined paper bags, shrink-wrapped on pallets for safe handling and transport. |
| Container Loading (20′ FCL) | 20′ FCL container loading of MOPLEN PP HP400H: 25-kg bags, palletized, shrink-wrapped, securely stowed for safe transport. |
| Shipping | MOPLEN PP HP400H (polypropylene homopolymer) ships as non-hazardous resin pellets in clean, dry containers or railcars. Protect from direct sunlight, high temperatures, and moisture. No special transport classification required, but secure packaging and covered, ventilated conveyance prevent contamination and physical damage during transit. Standard handling procedures apply. |
| Storage | Store MOPLEN PP HP400H in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep containers tightly sealed to prevent moisture pickup and contamination. Avoid dust accumulation; use grounded equipment if handling pellets. Maintain stable temperatures and protect packaging from damage. No special storage hazards are anticipated under normal conditions. |
| Shelf Life | MOPLEN PP HP400H has a shelf life of at least one year when stored in original, unopened packaging under dry, cool conditions. |
In thin-wall dairy cup production, MOPLEN PP HP400H is processed as a high-flow polypropylene homopolymer with a nominal melt flow rate of 40 g/10 min under ISO 1133-1:2022 at 230 °C/2.16 kg. The high MFR permits filling of multi-cavity hot-runner tools with wall stock down to 0.35 mm, but the low melt strength requires a narrow melt-temperature corridor: above 245 °C, production-scale hot-runner lines show increased gate blush and surface splay; below 210 °C, valve-gate tips can freeze off when hot-runner manifold zones differ by more than 5 °C. Compliance is assessed under FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011, including the overall migration limit of 10 mg/dm² under Article 12; any colour masterbatch must also be food-contact grade and covered by Regulation (EC) No 2023/2006 good manufacturing practice. In formulation, the polymer fraction is run at 100 wt% HP400H as supplied; PP-based colour masterbatch is introduced at 1.0–2.0 wt%; clean post-industrial regrind is limited to 10–15 wt% because higher regrind levels shift MFR upward and reduce holding-pressure transmission into thin cavity sections. The downstream process is high-speed injection moulding on machines with clamp force from 2,500 kN to 4,000 kN, screw L/D ratio 20:1–24:1, and hot-runner valve-gated drops; barrel zones are set from 210 °C to 240 °C, injection velocity is 160–220 mm/s, and holding pressure is 55–70 MPa. Mould temperature is controlled at 10–20 °C; if condensation appears on cold pellets after warehouse storage, dry-air treatment at 70–80 °C for 1 h is applied before charging. End-product types include 150 ml to 500 ml refrigerated dairy cups, snack pots, cold-fill portion cups, and delicatessen containers with stacking rims.
On high-cavitation closure tooling, the limiting variable is not melt fill but post-ejection roundness; HP400H at 40 g/10 min reduces inlet pressure, yet its homopolymer crystallinity produces anisotropic shrinkage of 1.2–1.6% along flow and 0.8–1.2% transverse, which must be compensated by hold time and cooling uniformity. Regulatory compliance for food-contact closures is conducted under FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011; when used with dairy or condiment products, organoleptic conformity is validated under the packer’s own sensory protocol, and the closure is also checked for migration of stabilising additives under the positive list in Annex I. In formulation, HP400H is used at 100 wt%; if low-opening-torque performance is specified, slip additive masterbatch on a PP carrier is introduced at 0.5–1.5 wt%, and colour masterbatch is held at 1.0–2.0 wt%. Filler and impact modifiers are excluded from closure compounds because they increase seal-plane roughness. Processing uses 48–96 cavity cold-runner or hot-runner systems with cycle times of 4.0–6.5 s, injection velocity 100–160 mm/s, holding pressure 40–55 MPa, and mould temperature 10–20 °C; gate shear is monitored by measuring MFR shift after moulding, where a shift greater than 3 g/10 min indicates excessive screw recovery or hot-runner residence time. End-product types include caps for still beverages, dairy bottles, condiment bottles, and overcaps for non-child-resistant closures.
| Application class | Regulation / standard | Clause or migration limit |
|---|---|---|
| Food-contact olefin polymer | FDA 21 CFR 177.1520(c) | Olefin polymer base resin specification |
| EU food-contact plastic overall migration | Regulation (EU) No 10/2011 | Article 12; OML 10 mg/dm² |
| Good manufacturing practice | Regulation (EC) No 2023/2006 | Articles 4–6 |
| China food-contact PP resin | GB 4806.7-2016 | Total migration and consumption specifications |
| Toy element migration | EN 71-3:2019+A1:2021 | Category III limits |
For small appliance housings and internal brackets, HP400H is adopted only where continuous service temperature remains below the relative thermal index assigned under UL 746B; for unreinforced polypropylene homopolymer this index is commonly in the 105–115 °C range, but the value must be confirmed on the final part thickness. Finished-appliance compliance is evaluated under IEC 60335-1 and the RoHS Directive 2011/65/EU; material declarations follow REACH Article 33. In formulation, the resin is processed at 100 wt%; where a static-dissipative surface is specified, a PP-based antistatic masterbatch is added at 2.0–5.0 wt%, and surface resistivity is verified below 1012 Ω by IEC 60093. Injection moulding uses screws of 25–35 mm diameter, melt temperature 220–240 °C, back pressure 0.5–1.5 MPa, and injection velocity 60–120 mm/s; venting depth is maintained at 0.01–0.03 mm because low-viscosity PP tends to flash if venting is deeper. End-product types include kettle bases, air fryer internal brackets, coffee machine drip trays, and rice cooker cosmetic covers in non-flame-retardant grades.
When stackable storage boxes are moulded at 1.2–2.0 mm nominal wall, the primary dimensional risk is differential shrinkage across ribbed bases, which produces bowing above 0.5 mm over a 300 mm span if gate placement does not feed the thickest rib first. HP400H is used at 100 wt%; if improved cold-warehouse impact is required, an ethylene-propylene copolymer is added at 5–10 wt%, and the flexural modulus of the blend is verified under ISO 178 because a reduction below 1,200 MPa can compromise stacking load retention. Regulatory compliance for general household storage is carried out under REACH Annex XVII; where the box is intended for direct food contact, EU Regulation (EU) No 10/2011 and FDA 21 CFR 177.1520(c) apply. Processing is injection moulding with cold-runner or hot-runner systems at melt temperature 220–235 °C, mould temperature 15–25 °C, holding pressure 45–60 MPa, and cooling time 8–14 s depending on rib thickness and tool steel thermal conductivity. Moving platen parallelism is maintained better than 0.03 mm; clamping force is selected so that cavity pressure does not fall below 35 MPa during second-stage hold. End-product types include stackable storage boxes, drawer organizers, toy bins, and shoe boxes with structural ribs.
Because polypropylene homopolymers develop living-hinge strength through post-mould flexing, hinge containers produced from HP400H are flexed through 60–90° immediately after ejection; the polymer fraction is run at 100 wt%, and colour masterbatch is restricted to 1.0–2.0 wt% because filler or pigment agglomerates create stress concentrators at the hinge root. For school lunch boxes and one-piece food containers, compliance follows FDA 21 CFR 177.1520(c) and EU Regulation (EU) No 10/2011; where the article is sold as a toy or children’s container, EN 71-3:2019+A1:2021 migration limits for Category III materials apply. The downstream process is injection moulding with a flow length to wall thickness ratio up to 200:1; hinge thickness is set at 0.20–0.30 mm, melt temperature 230–240 °C, and injection speed 120–180 mm/s. Published flexural fatigue data for HP400H living hinges is limited; endurance must be verified by in-house flexural cycling because nucleating-agent dispersion and tool-surface polish dominate crack initiation. End-product types include one-piece lunch containers, personal-care accessory cases, and packaging with integral snap hinges.
Injection-moulded toy and hobby components using HP400H are governed by EN 71-3:2019+A1:2021 for migration of elements and REACH Annex XVII; the polymer is used at 100 wt%, and colour masterbatch is dosed at 1.0–2.0 wt% from EN 71-compliant PP carriers. Processing on standard injection moulding machines at melt temperature 220–235 °C and mould temperature 15–25 °C yields building-block inserts, hobby trays, and non-structural game components.
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MOPLEN PP HP400H is a high-flow polypropylene homopolymer produced by LyondellBasell for injection moulding applications. The nominal melt flow rate is 40 g/10 min when determined at 230 °C under a 2.16 kg load according to ISO 1133-1:2022. Density at 23 °C is 0.90 g/cm³ under ISO 1183-1:2019. Because the backbone is homopolymeric, the product exhibits higher tensile modulus and heat deflection temperature than ethylene-propylene random copolymers, but lower notched impact resistance at sub-ambient temperatures. The material is supplied in pellet form and does not normally require drying because polypropylene is not hygroscopic. However, if surface moisture condensation occurs after storage in an environment exceeding 60% relative humidity, pre-drying at 80 °C for 2–3 h in a desiccant dryer is recommended to prevent surface splay.
In production-scale injection moulding, MOPLEN PP HP400H is processed on hydraulic or electric machines with a three-zone general-purpose screw. On a 1100 kN clamp-force machine using a 40 mm diameter screw with an L/D ratio of 22:1, barrel settings from feed to nozzle are typically 210/220/230/230 °C. A shut-off nozzle is recommended because the high melt flow can produce drool at open nozzles. Mould temperature should be maintained at 20–50 °C. Screw speed of 60–150 rpm and back pressure of 3–8 MPa provide stable screw recovery. Injection pressure depends on flow length and wall thickness. For a flow length-to-wall thickness ratio above 150:1, published data for this specific configuration is limited; tool trials are required to establish the filling-pressure envelope.
The melt flow rate of 40 g/10 min measured under ISO 1133-1:2022 is a low-shear viscosity index. At injection moulding shear rates of 10³–10⁵ s⁻¹, the apparent viscosity of high-flow homopolymers decreases substantially. The practical consequence is that MOPLEN PP HP400H can fill thin-wall mould cavities of 0.5–0.8 mm wall thickness at reduced injection pressure relative to a 12 g/10 min homopolymer. In a multi-cavity hot-runner tool with 0.6 mm sidewall thickness, the injection-pressure requirement may decrease by 15–25% compared with a lower-flow grade, but this reduction must be verified by mould-filling simulation using dynamic rheology data. Clamp force is not directly reduced in proportion to injection pressure because hold pressure and projected area govern the total force. A conservative clamp-force calculation still uses the projected area of the moulded part and runner system. For an open-runner tool of 200 cm² projected area and a cavity pressure of 35 MPa, the calculated minimum clamp force is 700 kN.
The grade’s rheological response should be checked by capillary rheometry at multiple temperatures. At 230 °C, the apparent viscosity at 1000 s⁻¹ is approximately one-half of the value at 100 s⁻¹, consistent with shear-thinning polypropylene homopolymer behaviour. This creates a process conflict in hot-runner systems: excessive shear heating in the gate land can raise the melt temperature above the set point and cause localised resin degradation. For a hot-runner valve-gate nozzle tip with a 1.2 mm gate diameter, a per-cavity shot volume of 12 cm³, and a filling time of 0.8 s, the calculated wall shear rate is approximately 8.8 × 10⁴ s⁻¹. An adiabatic pressure loss of 20 MPa across the gate corresponds to a calculated temperature rise of about 10–12 °C. When gate land diameters are below 1.0 mm and injection velocities exceed 300 mm/s, shear rates can exceed 10⁵ s⁻¹. The processing window is therefore controlled by injection velocity, gate geometry, and mould venting depth. Venting below 20 µm may produce gas entrapment and short shots in thin-wall cavities.
Thermal degradation becomes significant at melt temperatures above 280 °C. Even when the set melt temperature exceeds 250 °C, residence time at temperature should be restricted. At 260 °C, a residence time above 10 min may produce discoloration. The degradation pathway is random chain scission; oxygen ingress through the feed throat accelerates hydroperoxide formation. In vented barrels, volatile aldehydes and ketones can develop, reducing screw recovery stability and creating surface splay. The melt viscosity falls further, causing the holding-pressure profile to shift. The practical control strategy is to maintain the nozzle temperature no higher than 240 °C and the metering zone no higher than 230 °C. If hot-runner manifold temperatures exceed 250 °C, reduced melt strength may cause gate drool and part-weight variation. Processors should also avoid prolonged contact with copper-based heat stabilisers or transition metal stearates because copper and iron stearates can reduce long-term heat ageing performance of the homopolymer.
The main difference between MOPLEN PP HP400H and lower-flow homopolymers such as MOPLEN HP500N is the shorter average chain length. The higher MFR of 40 g/10 min versus 12 g/10 min under ISO 1133-1:2022 reduces the time required to fill thin sections and permits lower melt temperatures, but it also lowers notched Charpy impact strength. At 23 °C, the notched Charpy impact strength of MOPLEN PP HP400H is typically 3.0 kJ/m² under ISO 179-1:2010/1eA, whereas a lower-flow homopolymer may provide 4.0–5.0 kJ/m². At 0 °C, the difference becomes more pronounced because the ductile-to-brittle transition of the high-flow homopolymer occurs closer to ambient temperature. Consequently, the grade is not specified for impact-dominated applications such as freezer containers or automotive bumper components. For those applications, an impact copolymer with an ethylene-propylene rubber phase should be selected. The product is also unsuitable for transparent articles because homopolymer polypropylene has higher haze than clarified random copolymers.
Typical applications are thin-wall containers, caps and closures, housewares, and rigid packaging where short cycle times and thin wall sections are required. In such applications, melt flow rate measured under ISO 1133-1:2022 supports filling of wall sections down to 0.5 mm under standard injection moulding conditions. However, the as-supplied homopolymer has no inherent UV stabilisation for prolonged outdoor exposure. For accelerated weathering comparison, ISO 4892-2:2013 is used with appropriate stabiliser packages. For food-contact articles, compliance is governed by the olefin polymer provisions of FDA 21 CFR 177.1520 and EU Regulation 10/2011 Annex I. The moulded article must satisfy overall migration and specific migration limits under the intended food simulant. MOPLEN PP HP400H is typically covered by manufacturer food-contact declarations, but end-use migration testing remains the responsibility of the finished-article producer.
The heat deflection temperature of MOPLEN PP HP400H is typically 105 °C under 0.45 MPa flexural load according to ISO 75-2:2013 method B. The Vicat softening temperature is 154 °C under ISO 306:2022 A50 method. These values define short-term thermal resistance, not continuous-use temperature. Continuous exposure to temperatures above 90–100 °C in air increases oxidative degradation. The as-supplied stabilisation package is designed for normal injection moulding and indoor service. When storage or service conditions exceed 80 °C, ageing data generated under ISO 4577:2019 or ASTM D3012-19 should be obtained for the specific part thickness. The material is not recommended for long-term outdoor exposure without UV stabilisation; homopolymer polypropylene undergoes photodegradation unless carbon black or a hindered amine light stabiliser package is added.
| Property | Nominal Value | Test Method |
|---|---|---|
| Melt flow rate | 40 g/10 min at 230 °C / 2.16 kg | ISO 1133-1:2022 |
| Density | 0.90 g/cm³ at 23 °C | ISO 1183-1:2019 |
| Tensile modulus | 1650 MPa | ISO 527-2:2012 at 1 mm/min |
| Tensile yield stress | 35 MPa | ISO 527-2:2012 |
| Tensile yield strain | 8% | ISO 527-2:2012 |
| Flexural modulus | 1700 MPa | ISO 178:2019 |
| Charpy notched impact strength, 23 °C | 3.0 kJ/m² | ISO 179-1:2010/1eA |
| Charpy notched impact strength, 0 °C | 1.5 kJ/m² | ISO 179-1:2010/1eA |
| Heat deflection temperature, 0.45 MPa | 105 °C | ISO 75-2:2013 method B |
| Vicat softening temperature, A50 | 154 °C | ISO 306:2022 |
The values in the table are nominal values from the manufacturer’s published data and are not specification limits. Lot-to-lot melt flow variation should be checked by the processor using ISO 1133-1:2022. If mould filling is sensitive to lot-to-lot variation, the holding-pressure profile and gate geometry should be adjusted after each polymer lot. For critical thin-wall parts, the processor should establish statistical process control limits for melt flow rate, mould fill weight, and dimensional stability.
For thin-wall containers with wall thickness below 0.6 mm, mould-filling simulations based on dynamic viscosity data are recommended. The high-flow homopolymer reduces injection pressure, but the pressure reduction should not be used to reduce the structural design of the mould tool. Mould deflection and parting-line flash remain functions of cavity pressure and clamp force. The mould clamping force should be calculated using the total projected area of the cavity and runner system. For hot-runner tools, the projected area of the runner system is excluded, but the manifold temperature must be maintained within the recommended processing window to prevent gate freezing or drool.
Before switching from engineering resins to MOPLEN PP HP400H, the injection unit should be purged with a low-MFR polypropylene or a commercial purging compound to prevent cross-contamination with aromatic polycarbonate or polyamide residues at temperatures above 280 °C. If acetal resin is present, machine surfaces should be cleaned before processing because acid-catalysed depolymerisation of acetal can occur in the presence of polypropylene degradation products. The purging procedure should include barrel retract and manifold flushing in hot-runner tools. When changing from a high-temperature resin to MOPLEN PP HP400H, the barrel temperature should be reduced to the target polypropylene temperature before introducing the purging compound to avoid thermal degradation of residual resin. In direct injection moulding of thin-wall packaging, the grade can be processed without a melt pump. However, when used in a two-stage injection unit with a shooting pot, the melt temperature should be monitored at the shooting pot inlet to avoid override above 250 °C.
Compliance with chemical regulations is completed through the manufacturer’s supply documentation. The relevant matrix is shown below.
| Regulation or Standard | Scope |
|---|---|
| FDA 21 CFR 177.1520 | Olefin polymer food-contact clearance; end-use conditions and migration testing apply. |
| EU Regulation 10/2011 | Plastic materials and articles intended to come into contact with food. |
| REACH Regulation (EC) 1907/2006 | SVHC disclosure; product is typically below 0.1% w/w for substances on the candidate list. |
| RoHS Directive 2011/65/EU | Heavy metal content typically meets lead, cadmium, mercury, and hexavalent chromium limits. |
The grade is not suitable for gamma-sterilised medical packaging unless the selected irradiation dose has been validated for discoloration and embrittlement because polypropylene homopolymer undergoes chain scission under gamma radiation. For thin-wall packaging used with fatty foods, the high melt flow enables cycle-time reduction but does not change the inherent oxygen barrier of polypropylene; barrier performance is governed by wall thickness and permeation coefficients measured under ASTM D3985-17. For applications requiring low-temperature impact resistance below −20 °C, published data for this homopolymer should be reviewed, and a heterophasic impact copolymer should be evaluated.
Before switching from engineering resins to MOPLEN PP HP400H, the injection unit should be purged with a low-MFR polypropylene or commercial purging compound. If acetal resin is present, machine surfaces should be cleaned before processing because acid-catalysed depolymerisation of acetal in the presence of polypropylene degradation products can occur. Purging should continue until the melt stream is free of visible contamination and the screw recovery time has stabilised within the expected range for the new material.
