Product Overview

This blue cross-linked polyethylene (PE) heat shrink tube is engineered for 21700 and 26650 large-format cylindrical battery cell sleeve insulation. Cross-linked PE delivers superior chemical resistance, mechanical strength, and thermal stability compared to standard PVC tubing. The 50mm flat width accommodates larger cell diameters while the 2:1 shrink ratio ensures tight, wrinkle-free conformity after 80℃ heat activation. Blue color provides professional appearance and easy visual identification in multi-format battery production environments.

• Cross-Linked PE Material: Superior chemical resistance and mechanical strength compared to PVC, with 120℃ short-term temperature resistance for demanding battery manufacturing environments
• 2:1 Shrink Ratio: Consistent 50% transverse shrinkage ensures tight, uniform coverage over 21700 and 26650 cell casings without wrinkles or air pockets after 80℃ activation
• 50mm Flat Width: Optimized for 21700 (21mm diameter) and 26650 (26mm diameter) cells, providing full circumferential coverage with minimal material overlap
• 100m Continuous Roll: Extended roll length reduces changeover frequency on automated sleeving lines, improving production throughput
• 40%-50% Transverse Shrinkage: Reliable, consistent shrinkage within specification ensures predictable post-shrink dimensions for quality-controlled cell assembly

• 21700 cylindrical cell PVC-free sleeve insulation for EV battery packs
• 26650 large-format cell casing insulation for energy storage systems
• High-temperature battery assembly lines requiring 120℃ rated sleeving material
• Compatible with automated heat shrink tube applicators and hot-air shrinking tunnels operating at 80℃

• Factory Direct Supply: Direct manufacturer pricing on battery insulation materials with no middleman markups, competitive rates for volume production orders.
• Consistent Quality Control: Every batch undergoes shrink ratio verification at 80℃ activation temperature and 120℃ thermal endurance testing, with ISO 9001:2015 certified production processes.
• Fast Global Delivery: 5-8 working days processing with export-grade moisture-proof packaging. Worldwide shipping to battery manufacturers via reliable logistics partners.
• Flexible Order Quantity: Minimum 1 roll for sample testing and process validation. Volume pricing for bulk orders with 10,000 rolls monthly supply capacity.
• Technical Support: Application engineering team provides shrink tunnel parameter recommendations and integration guidance for automated battery production lines.
• Certified Materials: All products meet international battery manufacturing standards with full traceability and material certification documentation available upon request.