Sinopec hdpe

Selecting the right grade depends on the manufacturing process. For Injection Molding (e.g., crates, toys), choose grades with a High Melt Flow Index (MFI). For Blow Molding (e.g., bottles, jerrycans), prioritize grades with High Environmental Stress Crack Resistance (ESCR). For Pipe Extrusion, ensure the material meets PE100 or PE80 standards to guarantee pressure resistance and longevity.

Buyers must verify the Density (typically 0.941–0.965 g/cm³), which determines stiffness and chemical resistance. The Melt Mass-Flow Rate (MFR) is critical for processing efficiency. Additionally, check the Tensile Strength at Yield and Elongation at Break to ensure the final product can withstand mechanical stress without deformation.

For food-contact applications (packaging), the material must comply with FDA (US) or EU Food Grade regulations. For industrial use, ensure the supplier provides REACH and RoHS certificates to confirm the absence of hazardous substances. Always request a Certificate of Analysis (COA) for every batch to ensure consistency with Sinopec’s factory standards.

HDPE has a high melting point (approx. 130°C). It is essential to confirm the Vicat Softening Temperature if the product will be used in high-heat environments. For outdoor applications, ensure the grade includes UV Stabilizer additives to prevent degradation, brittleness, and discoloration caused by prolonged sunlight exposure.

The biggest risks include Price Volatility linked to crude oil markets and Quality Inconsistency if purchasing from unverified traders. To mitigate this, use Made-in-China.com’s Secured Trading services and only deal with Audited Suppliers who can prove their direct relationship with Sinopec refineries.

HDPE is a commodity; pricing is usually based on Spot Market Rates. Negotiate for Volume-Based Discounts (e.g., full container loads vs. LCL). For long-term projects, try to establish a Formula-Based Pricing agreement tied to industry benchmarks to avoid sudden price spikes.

HDPE is typically shipped in 25kg PP/PE bags on pallets. Ensure the container is Moisture-Proof and Clean to prevent contamination. During transit and storage, the material must be kept in a Cool, Dry, and Well-Ventilated warehouse, away from direct heat sources and oxidizing agents to maintain its chemical properties.

Always use Letters of Credit (L/C) or Telegraphic Transfer (T/T) with a deposit and balance against BL copy. Avoid untraceable payment methods. Utilizing the Escrow services on Made-in-China.com provides an extra layer of protection, ensuring funds are only released once the shipping documents are verified.