Overview
High Fluidity PP is a modified polypropylene resin engineered for superior flow characteristics during injection molding. Its low molecular weight distribution and tailored additives enable it to fill intricate molds with minimal pressure, reducing defects like sink marks and weld lines. This material retains the core advantages of standard PP, including chemical resistance, lightweight properties, and recyclability. It is particularly valued in industries requiring high production efficiency and precision, such as automotive manufacturing and disposable medical equipment.
Physical and Chemical Properties
High Fluidity PP typically has a melt flow rate (MFR) of 30-100 g/10 min (230°C/2.16 kg), significantly higher than conventional PP (MFR 1-25 g/10 min). This property ensures rapid mold filling even at lower temperatures, saving energy. Chemically, it resists acids, alkalis, and organic solvents but degrades under prolonged UV exposure unless stabilized. Its thermal stability allows processing at 200-280°C, though additives may vary this range. The material's density (~0.9 g/cm³) contributes to lightweight end products.
Main Applications
The automotive sector uses High Fluidity PP for dashboards, door panels, and battery casings due to its balance of strength and processability. In packaging, it enables thin-walled food containers and closures with tight sealing performance. Medical applications include syringe barrels and IV components, where clarity and sterility are critical. Consumer goods like housewares and toys benefit from its colorability and safety profile. Emerging uses include 3D printing filaments for rapid prototyping.
Safety and Storage
While non-toxic in solid form, molten High Fluidity PP releases volatile organic compounds (VOCs) requiring extraction systems. Dust from pellet handling may irritate respiratory systems; PPE like masks is recommended. Storage should prevent moisture absorption (max 0.05% water content) to avoid processing issues. Pellets are typically packaged in 25 kg bags or bulk containers with desiccants. Shelf life exceeds 12 months if stored below 30°C and 50% relative humidity.
B2B Procurement Guide
Key specifications to confirm include MFR (e.g., 50 g/10 min for thin-wall applications), impact modifiers (e.g., ethylene content for flexibility), and regulatory compliance (FDA, EU 10/2011 for food contact). Supplier audits should assess consistency in batch-to-batch quality and technical support capabilities. Pricing often scales with volume; contracts may include raw material index clauses. Sample testing under actual production conditions is advised before large orders.
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