Selecting between homopolymer and copolymer polypropylene (PP) directly impacts your manufacturing yield and bottom line. A mismatched material choice results in immediate factory-floor headaches: parts warping during cooling, components shattering under low-temperature impact, or crystal-clear designs turning milky and opaque.
Navigating the extensive Borouge PP catalog requires understanding three distinct molecular structures: Homopolymers (Homo-PP), Random Copolymers (RCP), and Block/Impact Copolymers (BCP).
Material Comparison at a Glance
| Physical Property | Homopolymer (Homo-PP) | Random Copolymer (RCP) | Block/Impact (BCP) |
|---|---|---|---|
| Ethylene Content | 0% | Low (1% - 7%) | Medium to High (5% - 15%) |
| Stiffness & Rigidity | Excellent (Highest) | Moderate | Low to Moderate |
| Impact Strength | Poor (Brittle below 0℃) | Fair | Excellent (Sub-zero cold) |
| Clarity & Transparency | Translucent to Opaque | Excellent (High Optical Clarity) | Opaque (Milky/Hazy) |
| Melting Point / HDT | Highest (~160℃ - 165℃ ) | Lowest (~140℃ - 150℃) | Moderate (~150℃- 160℃) |
| Mold Shrinkage | High | Low | Low |
Structural Characteristics and Key Borouge Grades
Homopolymer PP
Engineered for high rigidity and heat resistance. Linked in a highly uniform, semi-crystalline chain to maximize tensile strength.
- Structural loads & rigidity
- Hot-fill sterilization
- Brittle at 0℃
Borouge HJ333MO / HE120MO
Random Copolymer
Engineered for optical clarity. Deliberate chain disruption allows light passage with minimal scattering for "glass-like" finishes.
- Premium gloss & clarity
- Aesthetic shelf appeal
- Lower stiffness
Borouge RJ768MO / RE420MO
Impact Copolymer
Engineered for extreme toughness. Rubber phases act as shock absorbers to prevent crack propagation during impact.
- Drop & impact resistance
- Sub-zero freezer storage
- Opaque appearance
Borouge BJ368MO (Hot Sale)
Real-World Material Selection Scenarios
Cold Storage
Thin-Walled Cold-Storage Crates
Must handle fast-cycle injection molding and survive dropped impacts in cold-chain logistics down to -20℃.
Cosmetic/Clear
Premium Cosmetic Containers
Requires a glossy, "glass-like" premium finish that highlights the product inside and provides shelf success.
Industrial
Appliance Brackets & Heavy-Duty Lids
Structural components that must resist bending, creeping, or sagging under constant mechanical loads at room temperature.
Eliminate Sourcing Complexity with SalesPlastics
Finding the ideal polymer grade requires analyzing processing parameters, melt flows, and commercial costs. SalesPlastics helps you streamline this process, ensuring you secure the correct raw material.
Operating from our modern distribution warehouse in Jiaxing City, adjacent to the Port of Shanghai, we provide global plastic molders with direct access to premium Borouge products.
Direct, Certified Supply
100% genuine resins with original manufacturer COA and TDS.
Technical Guidance
Assist with grade optimization and injection molding parameters.
