The quality of polyethylene liners directly affects their service life and performance. When selecting them, it is important to evaluate multiple factors such as material, properties, and manufacturing process.
1. Material Composition and Molecular Weight
Molecular Weight Selection: High-molecular-weight polyethylene (HMWPE) features a molecular weight exceeding 3 million. It offers superior wear resistance, making it suitable for high-load scenarios. Standard high-density polyethylene (HDPE) has a molecular weight range of 500,000 to 1 million. Its lower cost makes it appropriate for general protective requirements.
Raw Material Purity: Prioritize plates manufactured from virgin material to avoid performance degradation caused by recycled material, such as embrittlement and cracking.
2. Performance Metric Verification
Abrasion Resistance Test: Refer to the Akron abrasion volume (≤0.05 cm³/1.61 km) or Taber abrasion index (≤50 mg/1000 r). Lower values indicate superior abrasion resistance.
Impact Strength: Cantilever notch impact strength should be ≥20 kJ/m² to ensure impact resistance.
Friction Coefficient: Dynamic friction coefficient ≤0.15 (self-lubricating type), suitable for low-friction applications.
3. Processing Techniques and Dimensional Accuracy
Forming Process: Molding produces uniformly dense sheets with stable properties. Extrusion is suitable for large-sized sheets, but requires attention to anisotropy caused by molecular chain orientation.
Dimensional Tolerance: Select tolerance grades (e.g., ±1mm or ±0.5mm) based on application scenarios; higher precision is required for precision equipment integration.
4. Certifications and Environmental Standards
Industry Certifications: Food applications require compliance with FDA or GB4806.7 standards. Industrial applications necessitate ISO9001 quality system certification.
Environmental Testing: Test for heavy metals (e.g., lead, cadmium) and phthalate content to mitigate contamination risks.
5. Suppliers and After-Sales Service
Case References: Require suppliers to provide similar industry application cases to validate product reliability.
Technical Support: Select suppliers of ultra-high molecular weight polyethylene sheets that offer customized processing (e.g., cutting, drilling) and installation guidance to reduce follow-up costs.
Henan Okay Plastic Industry Co., Ltd. has experienced design, production and construction teams, which can provide customers with on-site design, construction and after-sales service.If you would like to know more about the panels or are interested in purchasing, please send an email to: okay@chinaupe.com. We will contact you as soon as we see your request.
