Premium HDPE Powder for Plastic Manufacturing and Distribution

• Customization: Available
• Feature: Plastic, Paper
• CAS No.: 9002-88-4
• Model NO.: HDPE
• Formula: C2h4n
• EINECS: 618-339-3
• Material: Polyethylene/PE
• Usage: General Plastics, Engineering Plastics, Specialty Plastics
• Plastic Properties After Heated: Thermoplastic Plastics
• Plastic Forming Method: Film Pressure
• Color: White
• Transport Package: 25kg/Bag
• Specification: HDPE
• Trademark: Mingyi
• Origin: Shanghai
• HS Code: 3901100090
• Production Capacity: 50000mt

Product Description

Product Description

High Density Polyethylene (HDPE): Comprehensive Analysis

I. Basic Definition and Structure

• Chemical Structure: Linear polymer chains (virtually no branching), molecular formula: (C2H4)n
• Density: 0.941-0.965 g/cm³ (higher than LDPE's 0.910-0.925 g/cm³)
• Crystallinity: 60-80% (high crystallinity imparts strength and rigidity)
• Classification: A primary category of polyethylene (PE), alongside LDPE (Low Density) and LLDPE (Linear Low Density).

II. Core Properties

Property	Specific Performance
Mechanical	High rigidity (modulus 700-1500 MPa), high strength (tensile strength 20-35 MPa), excellent wear resistance
Heat Resistance	Melting point 120-130ºC (superior to LDPE's 105-115ºC), long-term use temperature ≤80ºC
Chemical Resistance	Resistant to acids, alkalis, salt solutions; moderate resistance to organic solvents (e.g., hydrocarbons, esters)
Environmental Stress Cracking Resistance	Moderate (improved via copolymerization, e.g., HDPE/LLDPE blends)
Barrier Properties	Low water vapor permeability (suitable for moisture-proof packaging); higher oxygen permeability (requires barrier layers)
Processability	Thermoplastic (reversible melting), moderate flowability, compatible with diverse molding processes

III. Molding Processes and Principles

1. Injection Molding
   • Applications: Daily necessities (buckets, basins), industrial parts (gears, bearings)
   • Principle: HDPE pellets heated to melt → injected into molds → cooled and solidified → demolded
   • Case: An injection molding plant in Shanghai produces HDPE turnover boxes, leveraging high strength for reusable logistics.
2. Blow Molding
   • Applications: Hollow containers (milk bottles, shampoo bottles), fuel tanks
   • Principle: Melted HDPE parison → inflated to mold walls → cooled and shaped
   • Data: HDPE blow-molded products accounted for 32% of China's PE applications in 2024 (dominant in packaging).
3. Extrusion Molding
   • Applications: Pipes (water supply, gas), sheets, films
   • Case: HDPE corrugated pipes produced by a Shanghai Free Trade Zone enterprise for underground drainage systems, with corrosion resistance extending service life to 50 years.
4. Rotational Molding
   • Applications: Large containers (water tanks, chemical storage tanks)
   • Principle: HDPE powder heated and rotated in a mold → melted and coated on inner walls → cooled and demolded
   • Advantage: Seamless, uniform wall thickness, suitable for customized large products (e.g., 50m³ storage tanks).

IV. Typical Application Scenarios

Industry	Specific Products	Property Match
Packaging	Milk bottles, detergent bottles, medicine bottles	Chemical resistance, high rigidity, food safety (FDA certified)
Industry	Chemical storage tanks, pipes, corrosion-resistant linings	Acid/alkali resistance, high pressure tolerance (pipe pressure 0.6-1.6 MPa)
Daily Use	Trash cans, storage boxes, plastic chairs	High strength, impact resistance, weatherability (UV stabilizer added)
Medical	Syringes, blood storage bags, pharmaceutical packaging	Sterility, transparency (improved via blending)
Agriculture	Drip irrigation pipes, fertilizer containers	Weather resistance, soil corrosion resistance
Environmental	Recycled plastic wood (HDPE + wood flour), waste sorting bins	Recyclability (resin code: chasing arrows #2)

V. Performance Comparison with LDPE

Property	HDPE	LDPE
Density	High (0.941-0.965)	Low (0.910-0.925)
Crystallinity	High (60-80%)	Low (40-50%)
Tensile Strength	20-35 MPa	8-12 MPa
Elongation at Break	200-1000% (moderate)	>500% (high elasticity)
Heat Resistance	Excellent (≤80ºC)	Good (≤60ºC)
Transparency	Translucent	Transparent
Typical Uses	Rigid packaging, pipes	Plastic bags, films

VI. Recycling and Sustainability

1. Resin Code: #2 (Chasing Arrows)
2. Recycling Process:
   • Sorting (AI-based in Shanghai Laogang Recycling Park) → washing → shredding → melt pelletizing → recycled products
3. Recycled Products:
   • Low-grade: Plastic pallets, trash cans, agricultural pipes
   • High-grade: Chemical recycling to fuels/monomers (50,000 tons/year pilot project in Shanghai, 2025)
4. Environmental Impact:
   • 1 ton of recycled HDPE saves 2 tons of oil and reduces CO2 emissions by 1.5 tons (China Plastics Association, 2024).
   • Shanghai's HDPE recycling rate reached 38% in 2024 (top in China, driven by waste sorting policies).

VII. Modification Technologies and Innovations

1. Copolymerization:
   • HDPE/α-olefin copolymer (e.g., hexene, octene) → improved impact resistance (e.g., automotive fuel tanks).
2. Filler Modification:
   • Calcium carbonate, talc addition → cost reduction, increased rigidity (e.g., HDPE calcium-plastic boxes).
3. Crosslinking:
   • Radiation-crosslinked HDPE (XLPE) → thermoset, high temperature (150ºC) and pressure resistance (cable insulation).
   • Note: Crosslinked HDPE is a specialty grade; standard HDPE remains thermoplastic.
4. Nanocomposites:
   • Montmorillonite/HDPE nanocomposites → 50% improved barrier properties (food packaging upgrade).

VIII. Industry Data and Trends

• Global Production: HDPE accounted for 45% of PE output in 2024 (≈54 million tons).
• China Market: 18 million tons consumed in 2024, 6% annual growth (driven by packaging and infrastructure).
• Technological Trends:
  • Ultra-high molecular weight HDPE (UHMWPE): 10x higher wear resistance than standard HDPE (mechanical parts, ballistic materials).
  • Bio-based HDPE: Sugarcane bagasse-derived (first 1,000-ton production line in Guangxi, 2025).

IX. Summary: Core Value of HDPE

Dimension	Value Proposition
Performance	Balanced rigidity and toughness, outstanding chemical resistance for harsh environments (chemical, infrastructure)
Economics	Lower cost than engineering plastics (e.g., PA, PC), high molding efficiency (injection cycle: 10-30 seconds)
Sustainability	Strong recyclability, mature recycling system, aligns with circular economy (key material in Shanghai's "Zero Waste City" initiative)
Application Breadth	Covers packaging (50%), industry (25%), daily use (15%), medical (5%), etc.

 

Detailed Photos

Product Parameters

Product name:	High Density Polyethylene
Appearance:	white powder
CAS No.:	9002-88-4
EINECS No.:	618-339-3
Molecular formula:	(C2H4)n
Monomer molecular weight:	28.05
Density:	0.962g/mLat 25°C
Melting point:	92°C
Boiling point:	48-110 °C(Press: 9 Torr)
Flash point:	270°C
water-solublility:	Soluble in acetone and benzene. Insoluble in water.

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