Overview
PP3155 is a polypropylene impact copolymer renowned for its balanced properties in rigidity and toughness. It is produced through a polymerization process that incorporates ethylene comonomers into the polypropylene chain, enhancing its impact resistance at low temperatures. This material is particularly valued in industries requiring durable yet lightweight plastic solutions. The copolymer structure of PP3155 gives it distinct advantages over homopolymer polypropylene, including improved stress crack resistance and better performance in cold environments. Manufacturers often select it for applications where standard PP homopolymers would be too brittle.
Physical and Chemical Properties
PP3155 exhibits a density range of 0.90-0.91 g/cm³, making it one of the lighter engineering plastics available. Its melting point typically falls between 160-165°C, with thermal stability up to approximately 120°C in continuous service. The material shows excellent resistance to acids, alkalis, and most organic solvents, though it can be attacked by strong oxidizers. Mechanically, PP3155 offers superior impact strength compared to standard polypropylene, with notched Izod impact values typically ranging from 5-8 kJ/m² at room temperature. Its flexural modulus is approximately 1,100-1,300 MPa, providing good structural rigidity for many applications.
Main Applications
In the automotive sector, PP3155 is extensively used for interior trim components, bumper fascias, and battery casings due to its impact resistance and weight-saving potential. The packaging industry utilizes it for thin-walled containers, caps, and closures that require drop resistance. Consumer goods manufacturers employ PP3155 for housewares, storage containers, and toys where durability is essential. Its FDA-compliant grades are suitable for food contact applications, including microwaveable containers and disposable tableware.
Safety and Storage
PP3155 is generally considered safe for handling with standard plastic processing equipment. While non-toxic in its solid form, thermal decomposition during processing can release fumes requiring adequate ventilation. Proper storage involves keeping the material in its original packaging in a dry environment below 40°C. Long-term exposure to UV radiation can degrade PP3155, so indoor storage is recommended. Bulk storage should maintain pellets below 60% relative humidity to prevent moisture absorption, which can affect processing characteristics.
B2B Procurement Guide
When sourcing PP3155, buyers should specify required certifications (e.g., FDA, RoHS) and key performance parameters including melt flow rate (typically 15-30 g/10min for injection molding grades). Sample testing for color consistency and mechanical properties is advisable before large orders. Lead times for PP3155 typically range from 2-6 weeks depending on supplier inventory. Many manufacturers offer custom compounding services to add colorants or modifiers. Consider regional suppliers to reduce logistics costs for this bulk material.
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