Blow-grade polyethylene compound is a thermoplastic polymer based on polyethylene, specifically engineered for blow molding processes. Renowned for its high strength, suitable flexibility, and resistance to environmental conditions, this material is an ideal choice for manufacturers producing hollow parts such as bottles, jerry cans, and tanks. Enhanced with specialized additives, the mechanical, chemical, and aesthetic properties of this compound are optimized, making it perfect for crafting durable, high-quality products.
Tolymer Manufacturing & Trading Group offers blow-grade polyethylene compounds 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 lightweight, robust, and cost-effective products that stand out in competitive markets.
Blow-grade polyethylene compound is highly valued for its mechanical strength, chemical resistance, and ability to produce hollow containers with uniform wall thickness. It serves as a cost-effective alternative to more expensive polymers like PET in numerous applications, allowing manufacturers to deliver high-quality products with lower production costs.
Key Applications:
Food and Chemical Packaging: Durable bottles and jerry cans for edible liquids, detergents, and chemicals.
Agricultural Industry: Water and liquid fertilizer tanks for use in farms and greenhouses.
Automotive Industry: Fuel tanks and hollow automotive components like coolant reservoirs.
Consumer Goods: Household plastic containers such as water bottles and cosmetic packaging.
Medical Industry: Sterile containers for packaging pharmaceutical liquids and medical equipment.
This compound enhances product durability while reducing manufacturing costs, making it a reliable choice for bulk buyers seeking high-quality, economical raw materials.
Base Polymer:
Polyethylene (HDPE or MDPE), providing strength, rigidity, and excellent processability.
Core Additives:
Antioxidants and thermal stabilizers to prevent degradation during blow molding and ensure long-term performance.
Fillers:
Calcium carbonate or talc (up to 20%) to reduce costs and enhance container wall strength.
UV Stabilizers:
For resistance to sunlight degradation in outdoor applications, such as agricultural tanks.
Pigments:
To create vibrant colors and enhance the aesthetic appeal of bottles and containers.
Flame Retardants:
For safety in applications involving flammable chemicals.
Anti-Static Additives:
To prevent static charge buildup in containers for sensitive materials.
Features:
Tensile strength of 20-30 MPa, melt flow index (MFI) of 0.3-2 g/10 min, suitable for containers with medium wall thickness.
Applications:
Detergent bottles, water containers, and industrial jerry cans. Example: Household detergent bottles.
Features:
High toughness (elongation at break up to 150%), ideal for containers under pressure or impact.
Applications:
Chemical jerry cans, automotive fuel tanks. Example: 20-liter chemical jerry cans.
Features:
Resistance to sunlight for up to 7 years, minimal yellowing, and retention of mechanical properties.
Applications:
Agricultural water tanks, outdoor containers. Example: 1000-liter farm water tanks.
Features:
Free of toxic substances, compliant with REACH and FDA standards for food contact.
Applications:
Drinking water bottles, pharmaceutical containers. Example: 1.5-liter mineral water bottles.
Features:
High resistance to acids, bases, and industrial solvents.
Applications:
Containers for hazardous chemicals, liquid fertilizer jerry cans. Example: Industrial acid packaging containers.
Blow-grade polyethylene compound, due to its ability to produce hollow containers and parts with uniform, durable walls, 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 plastic bottles for edible liquids (such as mineral water and soft drinks) and chemicals (such as detergents and industrial oils). Bottles made with the biocompatible grade are safe for food contact and, with a tensile strength of 20-30 MPa, resist cracking under impact or pressure.
For example,
Water and liquid fertilizer tanks for farms and greenhouses are produced using the UV-resistant grade. These tanks, ranging from 500 to 5000 liters, withstand sunlight and temperature fluctuations (from -30°C to 60°C) for up to 7 years.
For instance,
The compound is used to manufacture fuel tanks, coolant reservoirs, and oil containers for vehicles. The impact-resistant and chemical-resistant grades ensure these tanks withstand internal pressure and exposure to chemicals like gasoline.
For example,
Small bottles and containers for products like shampoo, creams, and lotions are made with this compound. With high-quality pigments, these containers have an attractive, professional appearance, and their suitable MFI (0.3-2 g/10 min) allows for thin, precise walls.
For example,
Sterile containers for packaging pharmaceutical liquids and medical equipment are produced with the biocompatible grade. Compliant with FDA standards, these containers are safe for indirect body contact and resistant to chemical degradation.
For instance,
Blow-grade polyethylene compound 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 20-30 MPa and elongation at break up to 150% in impact-resistant grades, this compound is perfect for containers that must withstand pressure or impact. For example, 20-liter chemical jerry cans resist breaking when dropped from a 1-meter height.
Excellent Processability:
An MFI of 0.3-2 g/10 min enables the production of containers with uniform, precise walls in blow molding processes. This is critical for high-volume production of complex bottles, such as soft drink bottles with unique designs. The processing temperature of 170-200°C also reduces energy consumption.
Chemical Resistance:
The compound resists acids, bases, and industrial chemicals, making it suitable for containers holding detergents or liquid fertilizers. For instance, liquid fertilizer jerry cans maintain their shape and color when exposed to acidic or alkaline contents.
Cost-Effectiveness:
Up to 15% cheaper than PET for similar applications, this compound reduces production costs, particularly in high-volume manufacturing. For example, mineral water bottle producers can offer competitive prices without sacrificing quality.
Versatile Grades:
Available in general-purpose, impact-resistant, UV-resistant, biocompatible, and chemical-resistant grades, this compound allows manufacturers to select the ideal material for specific needs, such as agricultural tanks or food-safe bottles.
Aesthetic Appeal:
High-quality pigments ensure smooth, glossy surfaces and vibrant colors, making the compound ideal for containers requiring visual appeal, like cosmetic bottles or beverage containers. For example, brightly colored shampoo bottles attract customers on store shelves.
Despite its many advantages, this compound has limitations that manufacturers should consider:
Limited Heat Resistance:
The material softens at temperatures above 85°C, making it unsuitable for containers holding hot liquids (above 80°C). For example, using it for bottles containing hot beverages like tea may cause deformation.
Sensitivity to Specific Solvents:
It has low resistance to certain organic solvents like gasoline, limiting its use in specific fuel tanks unless specialized grades are used.
Cost of Specialized Grades:
UV-resistant or biocompatible grades can be up to 15% more expensive, which may challenge budget-conscious projects. For instance, producing food-safe water bottles increases costs compared to general-purpose grades.
Flammability:
Without flame-retardant additives, the compound is flammable, requiring modifications for fire-sensitive applications.
Limited Wall Thickness:
In containers with very thin walls, high viscosity may reduce wall uniformity, requiring precise process adjustments.
Complex Recycling:
Due to additives, recycling this compound is more challenging than standard polyethylene, requiring specialized processes.
Proper storage of blow-grade polyethylene compound is essential to maintain its 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 bubbles or surface defects in containers. Use laminated bags with a 100-micron polyethylene lining for protection.
UV Protection:
Sunlight can degrade sensitive additives like UV stabilizers. 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 the compound:
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 bottle 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 blow-grade polyethylene compound may encounter challenges, which can be managed with the following measures:
Wall Thickness Non-Uniformity:
High viscosity in some grades can cause uneven wall thickness. Precise temperature control (170-200°C) and pressure adjustments mitigate this issue. For example, in producing thin bottles, precise pressure settings are critical.
Moisture Absorption:
Moisture above 0.1% causes bubbles or surface defects. Dry granules at 60°C for 2 hours before processing.
Poor Additive Dispersion:
Inconsistent filler dispersion can reduce strength or cause visual defects. High-speed mixers ensure uniformity.
Thermal Degradation:
Processing above 200°C can degrade the polymer, reducing mechanical properties. Maintain recommended temperatures of 170-200°C.
Container Leaks:
Poor mold design or inadequate cooling can cause leaks in containers. High-quality molds and precise cooling control resolve this issue.
Selecting high-quality blow-grade polyethylene compound is crucial for producing durable, competitive products:
– Grade Selection: Choose a grade that matches the application, such as biocompatible for water bottles or impact-resistant for chemical jerry cans.
– Mechanical Properties: Verify tensile strength (minimum 20 MPa) and elongation at break with technical data sheets from the supplier.
– Environmental Resistance: For outdoor applications, ensure UV-resistant grades are tested per ASTM G154 to confirm durability against sunlight.
– Moisture Content: Granules should have moisture below 0.1% to prevent defects. Request moisture test reports from the supplier.
– Melt Flow Index (MFI): An MFI of 0.3-2 g/10 min ensures proper processability. Lower MFI grades are better for larger containers.
– Safety Certifications: For sensitive applications like food packaging, confirm compliance with FDA 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 thermoplastics with similar processability, used in container and packaging production.
Differences:
Blow-grade polyethylene compound offers higher strength and chemical resistance due to additives, while standard PE is cheaper.
Advantage:
Superior strength and processability for complex hollow containers like fuel tanks.
Limitation:
Higher cost compared to standard PE for general applications.
Similarities:
Both are used for producing beverage bottles and packaging containers.
Differences:
PET offers better clarity and heat resistance, but blow-grade polyethylene compound is more cost-effective and impact-resistant.
Advantage:
Lower cost and better impact resistance for larger bottles.
Limitation:
Lower clarity than PET for premium beverage bottles.
Similarities:
Both are used in container and plastic part production with molding processes.
Differences:
PP offers better heat and chemical resistance, but blow-grade polyethylene compound is more flexible and suitable for hollow containers.
Advantage:
Better processability for blow-molded containers and lower cost.
Limitation:
Lower heat resistance for high-temperature applications.
It’s a polyethylene-based polymer enhanced with additives like fillers and stabilizers, designed for blow molding to produce hollow containers.
این کامپاند به دلیل افزودنیها، استحکام، مقاومت شیمیایی، و فرآیندپذیری بهتری نسبت به پلیاتیلن معمولی دارد و برای ظروف پیچیده مناسبتر است.
Packaging (water bottles, detergents), agriculture (water tanks), automotive (fuel tanks), and medical (sterile containers).
Yes, UV-resistant grades withstand sunlight for up to 7 years, ideal for agricultural tanks.
Check tensile strength, MFI, moisture content (<0.1%), and certifications like REACH or FDA. Request test samples.
Yes, but additives make recycling more complex than standard PE, 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., food bottles or chemical tanks), and choosing the wrong grade can reduce product quality.