PP-Moplen HP500N
PP-Moplen HP500N is a premium homopolymer polypropylene manufactured by LyondellBasell, highly favored for its exceptional stiffness, thermal resistance, and easy flowability (MFR 12 g/10 min). It is widely specified for rigid packaging, caps, and integrated living hinges. At Jucheng Precision, an ISO 9001:2015 and IATF 16949 certified manufacturer, we specialize in high-precision molding of Moplen HP500N. Utilizing our 35+ advanced molding presses (50-650T) and 25+ in-house 5-axis CNC machines, we control this grade's anisotropic shrinkage (1.3%-1.8%). Our 24-hour free DFM analysis optimizes gate placement to prevent weld lines, ensuring structural integrity verified by Zeiss CMM inspection.
Moplen HP500N Performance & Processing Attributes
Moplen HP500N is a homopolymer Polypropylene engineered by LyondellBasell, optimized for injection molding of high-stiffness, heat-resistant components:
| Resin Grade | Resin Sub-Type | Core Technical Features |
|---|---|---|
| Moplen HP500N | Unfilled PP Homopolymer | High mechanical stiffness, outstanding fatigue resistance (vital for living hinges), low moisture absorption, and excellent heat deflection properties under low loads. |
Molding Process Configurations for Moplen HP500N
This grade’s stable 12 g/10 min melt flow rate allows for multiple high-speed production configurations:
| Molding Technology | Process Suitability for HP500N |
|---|---|
| Living Hinge Molding | Excellent. Moplen HP500N’s molecular chains orient highly under shear, creating robust, flexible hinge sections in flip-top caps that can flex thousands of times without tearing. |
| Thin-Wall Packaging Molding | High. Its intermediate flow index (MFR 12) supports fast filling of thin-walled food containers and high-gloss houseware products with low injection pressures. |
| Standard Injection Molding | Excellent. Ideal for producing rigid, high-gloss household components, clips, structural brackets, and appliance trims. |
PP-Moplen HP500N Tooling & Injection Processing Guide
To prevent warpage and optimize the fatigue strength of the living hinges, our technical team implements precise processing boundaries for Moplen HP500N:
- Living Hinge Tooling Design: To secure optimal molecular orientation across the hinge, our in-house tooling division utilizes 5-axis CNC machines to cut precise, highly polished steel cores. Gates are placed to ensure the melt flows straight across the hinge perpendicular to the flexing axis, avoiding weak weld lines in the thin (typically 0.25mm to 0.38mm) hinge area.
- Melt Temperature profile: Maintained strictly between 200°C and 240°C (392°F to 464°F). Under-heating increases viscosity, causing high internal stresses, while overheating degrades the homopolymer chains, making hinges brittle.
- Mold Temperature Control: Managed at 20°C to 50°C (68°F to 122°F). Rapid cooling is necessary to restrict crystalline grain size, which increases part toughness and flexibility, particularly for snap-fits and hinges.
- Shrinkage Compensation: Homopolymer PP shrinks heavily (1.3% to 1.8%). Jucheng’s tooling engineers offset this volumetric shrinkage in the mold design stage using Moldflow analysis to maintain strict part geometry.
Key Application Fields for Moplen HP500N Parts
- Cosmetic & Food Packaging: Integrated flip-top caps, dispensing closures, thin-walled food containers, and reusable storage boxes.
- Consumer & Household Goods: High-gloss kitchenware, plastic cutlery, clothes hangers, rigid containers, and high-stiffness organizers.
- Office Equipment & Industrial: High-strength structural brackets, protective covers, document clips, and high-fatigue snapping clips.
Properties
| Density | 0.900 g/cm³ |
| Melt Mass-Flow Rate (MFR) (230°C/2.16kg) | 12 g/10 min |
| Tensile Strength at Yield | 35 MPa |
| Tensile Elongation at Yield | 10 % |
| Flexural Modulus | 1,450 MPa |
| Izod Impact Strength (Notched, 23°C) | 40 J/m |
| Shore D Hardness | 70 - |
| Vicat Softening Temperature | 154 °C |
| Heat Deflection Temperature (HDT @ 0.45 MPa) | 100 °C |
| Linear Mold Shrinkage | 1.3 - 1.8 % |
| Dielectric Strength | 22 kV/mm |
| Volume Resistivity | 1.0E+16 Ohm·cm |
| Maximum Part Size | 1000 x 800 mm |
| Minimum Part Size | 1 x 1 mm |