Polyethylene Sheet[2]
Overview
Polyethylene (PE) sheets are engineered thermoplastic panels derived from ethylene polymerization. With exceptional corrosion resistance, they are ideal for environments exposed to acids, alkalis, and solvents. Grades range from flexible LDPE (low-density) to rigid UHMWPE (ultra-high molecular weight), each optimized for specific load-bearing and wear conditions. These sheets are manufactured through extrusion or compression molding, allowing precise control over thickness (1–100 mm) and surface finish. Their lightweight nature (15% the weight of steel) simplifies installation while maintaining structural integrity in applications like chemical processing and food handling.
Physical and Chemical Properties
PE sheets exhibit low moisture absorption (<0.01%), preventing swelling or degradation in wet environments. Their dielectric strength (≥20 kV/mm) makes them suitable for electrical insulation. Thermal conductivity ranges 0.33–0.51 W/m·K, while the coefficient of friction (0.1–0.3) enables smooth material flow in conveyor systems. Chemically, PE resists hydrochloric acid (20%), sulfuric acid (50%), and most organic solvents at room temperature. However, oxidizing agents like nitric acid may cause degradation. Antioxidant additives enhance UV stability for outdoor use, though prolonged sunlight exposure can reduce mechanical properties by up to 30% over 5 years.
Main Applications
In industrial settings, PE sheets line chemical storage tanks, protecting against leaks and contamination. Their FDA-compliance allows food-grade use for cutting boards and processing tables. Mining industries utilize their abrasion resistance for chute liners, reducing maintenance downtime by 40–60% compared to metal. Construction applications include waterproof membranes and temporary road plates. UHMWPE sheets serve in high-wear scenarios like dump truck bed liners, lasting 3× longer than carbon steel. Anti-static variants prevent sparking in electronic manufacturing cleanrooms.
Safety and Storage
While PE is non-toxic under normal use, overheating (>200°C) releases flammable vapors requiring proper ventilation. Dust from machining operations poses inhalation risks—use local exhaust and OSHA-approved respirators. Store sheets flat on pallets to prevent warping, away from heat sources and direct sunlight. Optimal conditions are <40°C at 30–50% relative humidity. Stack height should not exceed 1 meter to avoid deformation. For outdoor storage, cover with UV-blocking tarps and rotate stock every 6 months.
B2B Procurement Guide
Specify material grade: HDPE for rigidity, LDPE for flexibility, or UHMWPE for extreme wear resistance. Critical dimensions include thickness (±10% tolerance) and sheet size (common: 1000×2000 mm to 2000×4000 mm). For corrosive environments, request chemical compatibility charts from suppliers. MoQ typically starts at 500 kg, with lead times of 2–4 weeks for custom colors/thicknesses. Verify supplier certifications like ISO 9001 and RoHS compliance. Sample testing for impact strength (ASTM D256) and tensile properties (ASTM D638) ensures quality consistency.
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