Polypropylene black PP granule is a thermoplastic polymer based on polypropylene, specifically engineered for manufacturing casings and components of lead-acid batteries and other battery types. Renowned for its high strength, excellent chemical resistance to acids, and superior electrical insulation, this material is an ideal choice for manufacturers of automotive, industrial, and household batteries. Enhanced with specialized additives, the mechanical, chemical, and thermal properties of this compound are optimized, making it perfect for producing durable, high-safety batteries.
Tolymer Manufacturing & Trading Group offers polypropylene black PP granule in various grades, meeting the needs of bulk buyers with a focus on quality, performance, and competitive pricing. With excellent processability and application versatility, this compound enables manufacturers to produce robust, lightweight, and cost-effective battery casings and components that stand out in competitive markets.
Polypropylene black PP granule is highly valued for its chemical resistance to strong acids like sulfuric acid, high mechanical strength, and electrical insulation properties, making it widely used in the battery manufacturing industry. It serves as a cost-effective alternative to more expensive polymers like ABS for battery components, allowing manufacturers to deliver high-quality products with lower production costs.
Key Applications:
This compound enhances battery durability and safety while reducing production costs, making it a reliable choice for bulk manufacturers seeking high-quality, economical raw materials.
Base Polymer:
Polypropylene homopolymer or copolymer, providing strength, rigidity, and suitable processability for battery casing production.
Core Additives:
Antioxidants and thermal stabilizers to prevent degradation during injection molding and ensure long-term performance.
Fillers:
Calcium carbonate or talc (up to 20%) to reduce costs and enhance battery casing strength.
Chemical Stabilizers:
For resistance to sulfuric acid and other chemicals present in batteries.
Flame Retardants:
For fire safety, compliant with UL 94 V-0 standards.
Pigments:
To create standard colors (typically black or gray) and enhance aesthetic appeal.
Anti-Static Additives:
To prevent static charge buildup in battery components.
Features:
Tensile strength of 25-35 MPa, melt flow index (MFI) of 8-15 g/10 min, suitable for battery casings with medium thickness.
Applications:
Casings for automotive and industrial batteries. Example: Casings for 12V car batteries.
Features:
High toughness (elongation at break up to 100%), ideal for batteries under mechanical stress.
Applications:
Casings for heavy-duty industrial batteries. Example: Forklift batteries.
Features:
High resistance to sulfuric acid and corrosive chemicals.
Applications:
Separators and enclosures for lead-acid batteries. Example: UPS battery enclosures.
Features:
Resistance to high temperatures (up to 120°C) and thermal stability.
Applications:
Automotive batteries in tropical regions. Example: Batteries for desert vehicles.
Features:
High electrical resistance (up to 10¹⁶ ohm-meters) for electrical safety.
Applications:
Internal insulating components for batteries. Example: Battery internal separators.
Polypropylene black PP granule, due to its ability to produce robust and insulating battery components, is widely used across various industries. Below, the key final products and their detailed applications are outlined to ensure clarity, even for readers with limited technical knowledge:
This compound is used to produce casings and lids for lead-acid batteries in light and heavy vehicles. With a tensile strength of 25-35 MPa and resistance to sulfuric acid, these casings withstand mechanical and chemical stress.
Enclosures for energy storage systems (such as UPS) and industrial batteries are produced using impact-resistant and acid-resistant grades. These enclosures offer high chemical and mechanical resistance, ensuring safety and durability.
Components for rechargeable batteries used in inverters and home emergency power systems are made with this compound. These parts, with high electrical insulation (up to 10¹⁶ ohm-meters) and abrasion resistance, are suitable for long-term use.
Small, durable casings for motorcycle batteries are produced with the impact-resistant grade. These casings, weighing around 500 g for a 12V battery, resist vibrations and are ideal for tough riding conditions.
Separators and internal insulating components are produced with the high-insulation grade. These parts, with high electrical resistance and chemical stability, ensure battery safety.
Polypropylene black PP granule is an ideal choice for bulk manufacturers due to its outstanding properties. Below, the key advantages are detailed:
High Strength:
With a tensile strength of 25-35 MPa and high toughness, this compound is perfect for battery casings that must withstand pressure and impact. For example, automotive battery casings resist road impacts without cracking.
Excellent Chemical Resistance:
The compound resists sulfuric acid and other chemicals in batteries, making it ideal for lead-acid battery enclosures. For instance, UPS battery casings resist acid leaks, preventing corrosion.
Electrical Insulation:
With electrical resistance up to 10¹⁶ ohm-meters, this compound ensures electrical safety in battery components. For example, internal separators prevent short circuits, maintaining safe performance.
Cost-Effectiveness:
Up to 15% cheaper than ABS for similar applications, this compound reduces production costs, especially in high-volume manufacturing. For example, automotive battery manufacturers can offer competitive prices without sacrificing quality.
Easy Processability:
An MFI of 8-15 g/10 min enables fast, precise production of complex parts in injection molding processes. This is critical for high-volume production of battery casings with specific designs.
High Safety:
Flame-retardant additives (compliant with UL 94 V-0) reduce fire risks, essential for industrial and automotive batteries. For example, UPS battery casings ensure safety in sensitive environments.
Despite its many advantages, polypropylene black PP granule has limitations that manufacturers should consider:
Limited Heat Resistance:
In general-purpose grades, polypropylene black PP granule may soften or deform above 80°C, limiting use in high-temperature environments like near car engines. Heat-resistant grades withstand up to 120°C. For example, automotive battery casings in tropical regions require heat-resistant grades.
Sensitivity to Organic Solvents:
Polypropylene black PP granule has low resistance to certain organic solvents like gasoline, limiting use in specific chemical environments unless specialized grades are used.
Cost of Specialized Grades:
Heat-resistant or acid-resistant grades can be up to 15% more expensive, which may challenge budget-conscious projects. For instance, industrial batteries with acid-resistant grades increase production costs.
Flammability:
Without flame-retardant additives, polypropylene black PP granule is flammable, requiring modifications for fire-sensitive applications.
Shrinkage in Thick Parts:
In thick components, uneven cooling may cause shrinkage and deformation. Precise mold design reduces this issue. For example, thick industrial battery casings require advanced molds.
Recycling Challenges:
Recycling polypropylene black PP granule is more complex due to chemical additives and fillers, requiring specialized processes, which can be problematic in industries prioritizing recycling.
Poor Filler Dispersion:
In reinforced grades of polypropylene black PP granule, inadequate filler dispersion may reduce strength or cause surface defects. High-speed mixers resolve this issue.
Moisture Impact in Processing:
Moisture absorption up to 0.1% can cause bubbles or surface defects in battery components. Drying granules before production is essential. For example, moisture in automotive battery casings can reduce surface quality.
Proper storage of polypropylene black PP granule is essential to maintain quality and prevent production issues:
Temperature Control:
Store granules at 15-25°C to prevent clumping or additive degradation. Temperatures above 30°C may reduce quality. For example, warm warehouses can cause granules to stick together, affecting processability.
Moisture Protection:
Moisture levels above 0.1% can cause surface defects in battery components. Use laminated bags with a 100-micron polyethylene lining for protection.
UV Protection:
Sunlight can degrade sensitive additives. Store in enclosed areas using opaque bags to maintain quality.
Organized Stacking:
Stack up to 5 bags per pallet with 50 cm spacing for proper ventilation, preventing heat buildup.
Periodic Checks:
Regularly monitor temperature, humidity, and bag condition. Using the FIFO (First In, First Out) principle ensures older stock is used first, maintaining quality.
Safe packaging and transportation are critical to preserving the quality of polypropylene black PP granule:
Robust Packaging:
25 kg laminated bags or 500-1000 kg big bags with polyethylene lining protect against moisture and contamination. For example, big bags are ideal for large-scale deliveries to battery manufacturing plants.
Clear Labeling:
Durable labels with safety instructions (e.g., “Keep away from sunlight”) and technical details (grade, MFI, production date) per ISO 780 standards.
Safe Transport:
Use clean, ventilated vehicles with temperatures below 30°C to prevent degradation, especially in warm seasons. Refrigerated containers are recommended for hot climates.
Load Stability:
Symmetrical stacking with secure straps on standard pallets (1000 kg capacity) prevents shifting during transport.
Regulatory Compliance:
Transport per ADR regulations, providing Material Safety Data Sheets (MSDS) and quality certificates to ensure compliance with international standards.
Manufacturing with polypropylene black PP granule may encounter challenges, which can be managed with the following measures:
Sticking in Processing:
High viscosity in some grades can cause sticking to molds. Using lubricants and adjusting mold temperature (200-250°C) reduces this issue. For example, in battery casing production, lubricants improve cycle times.
Moisture Absorption:
Moisture above 0.1% causes bubbles or surface defects. Dry granules at 80°C for 2 hours before injection.
Poor Additive Dispersion:
Inadequate filler dispersion can reduce strength or cause visual defects. High-speed mixers resolve this issue.
Unexpected Shrinkage:
In thick parts, uneven cooling causes shrinkage and deformation. Mold designs with uniform cooling channels reduce this issue.
Thermal Degradation:
Processing above 250°C can degrade the polymer, reducing mechanical properties. Maintain recommended temperatures of 200-250°C.
Selecting high-quality polypropylene black PP granule is crucial for producing durable, safe batteries:
Grade Selection:
Choose a grade that matches the application, such as acid-resistant for lead-acid battery enclosures.
Mechanical Properties:
Verify tensile strength (minimum 25 MPa) and MFI with technical data sheets from the supplier.
Chemical Resistance:
For acid-exposed applications, ensure acid-resistant grades are tested per standards.
Moisture Content:
Granules should have moisture below 0.1% to prevent defects. Request moisture test reports.
Melt Flow Index (MFI):
An MFI of 8-15 g/10 min ensures proper processability. Higher MFI grades are better for thin parts.
Safety Certifications:
For sensitive applications, confirm compliance with UL 94 or REACH standards.
Additive Quality:
Uniform dispersion of fillers and additives is critical for product quality. Testing small samples before bulk purchase is recommended.
Similarities:
Both are used in producing plastic components via molding processes.
Differences:
Polypropylene black PP granule offers higher chemical and thermal resistance, while PE is more flexible and cheaper.
Advantage:
Better chemical resistance and strength for batteries.
Limitation:
Less flexibility than PE.
Similarities:
Both are thermoplastics with similar processability, used in producing plastic components.
Differences:
Polypropylene black PP granule is optimized with additives for chemical resistance and electrical insulation, while general PP has broader applications.
Advantage:
Superior chemical resistance and insulation for battery components.
Limitation:
Higher cost than standard PP for non-specialized applications.
Similarities:
Both polypropylene black PP granule and polycarbonate are robust polymers used in battery component production via injection molding. Both are suitable for industrial applications like battery parts.
Differences:
Polycarbonate offers higher impact resistance and is suitable for advanced batteries like lithium-ion, while polypropylene black PP granule is designed for lead-acid batteries with high chemical resistance to sulfuric acid.
Advantage of Polypropylene Black PP Granule:
Polypropylene black PP granule provides lower costs (up to 15% cheaper) and excellent chemical resistance for acid-based batteries, making it ideal for mass production of automotive and industrial batteries.
Limitation of Polypropylene Black PP Granule:
Lower impact resistance and limited heat resistance (up to 80°C in general grades) compared to polycarbonate, which is better for high-temperature environments.
Similarities:
Both are used for producing durable components like battery casings.
Differences:
ABS offers better strength and surface quality but is more expensive and has lower chemical resistance to acids.
Advantage:
Lower cost and better chemical resistance than ABS.
Limitation:
Lower heat resistance than ABS in high-temperature applications.
It’s a polypropylene-based polymer enhanced with additives like fillers and flame retardants, designed for producing battery casings and components.
Polypropylene black PP granule has enhanced chemical resistance, electrical insulation, and strength tailored for battery applications.
Automotive (car batteries), industrial (UPS batteries), household (inverters), and motorcycle (small batteries).
Yes, heat-resistant grades withstand up to 120°C, ideal for car batteries in tropical regions.
Check tensile strength, MFI, moisture content (<0.1%), and certifications like UL 94 or REACH. Request test samples.
Yes, but additives make recycling more complex, requiring specialized processes.
Store at 15-25°C with moisture below 0.1% in opaque, laminated bags to maintain quality.
Each grade is designed for specific applications (e.g., automotive or industrial batteries), and choosing the wrong grade can reduce product quality and safety.