Overview
Polyethylene blend liners are engineered materials combining polyethylene (PE) with other polymers such as EVA, PP, or elastomers to optimize performance. These blends enhance properties like tear resistance, flexibility, and environmental stress crack resistance compared to pure PE. They are commonly extruded into sheets or films for barrier applications. The development of PE blends addresses industry demands for materials that balance cost, processability, and durability. By adjusting the polymer ratios, manufacturers can tailor liners for specific conditions, such as extreme temperatures or chemical exposure.
Physical and Chemical Properties
PE blend liners exhibit a density range of 0.92–0.96 g/cm³, with melting points varying by composition (typically 105–135°C). Their low moisture permeability (<0.5 g/m²/day) and resistance to acids, alkalis, and oils make them ideal for protective applications. Mechanical properties include tensile strengths of 20–35 MPa and elongation at break exceeding 500%, ensuring durability under stress. Additives like UV stabilizers or anti-static agents can further customize performance for outdoor or hazardous environments.
Main Applications
In industrial packaging, PE blend liners are used for bulk container liners, protecting goods from moisture and contamination. Construction applications include vapor barriers in foundations and roofing membranes due to their waterproofing capabilities. The automotive sector employs these liners as underbody coatings or sound dampeners, leveraging their vibration absorption. Agricultural films made from PE blends optimize light diffusion and durability for greenhouse covers or silage protection.
Safety and Storage
PE blend liners are generally non-toxic and compliant with FDA and EU food-contact regulations when formulated without hazardous additives. However, processing at high temperatures may release volatile compounds, requiring adequate ventilation. Storage recommendations include keeping rolls or sheets in a cool (<30°C), dry environment away from direct sunlight to prevent premature degradation. Pallets should be stacked horizontally to avoid deformation.
B2B Procurement Guide
Buyers should specify technical parameters such as thickness (commonly 0.1–2.0 mm), blend type (e.g., PE/EVA for flexibility), and additive packages. MOQs for industrial orders typically start at 1 ton, with prices varying by volume and customization. Supplier audits are advised to verify quality control measures like ISO 9001 certification. Sample testing for tensile strength and chemical resistance is recommended before large-scale procurement.
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