Pe sack

Selecting the correct density is critical for performance. LDPE (Low-Density Polyethylene) is ideal for applications requiring high flexibility and puncture resistance, such as heavy-duty industrial liners. HDPE (High-Density Polyethylene) offers superior tensile strength and is more cost-effective for lightweight packaging like grocery or trash bags. For high-performance needs, LLDPE (Linear Low-Density Polyethylene) provides the best balance of strength and stretchability.

Buyers must specify the thickness (measured in microns or mils) to ensure the sack can handle the intended load weight. Tensile strength and elongation at break should be tested according to ASTM D882 standards. Additionally, if the sacks are for outdoor use, ensure they include UV stabilizers to prevent degradation from sunlight exposure.

If the sacks are intended for food contact, they must comply with FDA (U.S. Food and Drug Administration) regulations or EU Regulation No 10/2011. Ensure the supplier provides a Declaration of Compliance (DoC) and third-party migration test reports to guarantee no harmful chemicals leach into the food products.

The bottom and side seals are the most common points of failure. Request heat seal strength tests to ensure the seams can withstand the maximum rated pressure. For heavy-duty industrial sacks, double-sealed bottoms are recommended to prevent leakage of powders or granular materials.

The most common risk is the use of recycled scrap material instead of 100% virgin resin, which reduces clarity and strength. Always request a pre-shipment inspection (PSI) and use platforms like Made-in-China.com to select Audited Suppliers who have verified production capabilities and material certifications.

Since PE is a petroleum-based product, prices fluctuate with global oil and resin market indices. Negotiate a formula-based pricing model tied to current resin spot prices. Additionally, increasing your order volume to reach Full Container Load (FCL) quantities can reduce unit costs by 15-20% due to logistics efficiencies.

Many countries are implementing Plastic Taxes or bans on single-use plastics. Check if your destination country requires a minimum percentage of Post-Consumer Recycled (PCR) content or if the sacks must be biodegradable/compostable (EN 13432 standard) to avoid heavy customs fines or import blocks.

Utilize Secured Trading Services provided by Made-in-China.com to ensure your payment is only released to the supplier once you have confirmed receipt of goods that meet your specifications. Avoid direct wire transfers to unknown accounts without a formal Proforma Invoice (PI) and a verified business license.