Products and Services PET Product SeriesPET Heat Shrink Tubing for Batteries

PET Heat Shrink Tubing for Batteries

PET heat shrink tubing for batteries is an automotive-grade high-performance polyester insulating protective material, specially engineered for cylindrical lithium-ion cells and battery packs.<br>Upon heating, it shrinks evenly to tightly wrap cells and modules, forming a high-strength insulating protective layer. It integrates core properties including electrical isolation, short-circuit prevention, corrosion resistance and aging resistance, serving as the critical safety shell for new energy battery protection.

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Core Features

Electrical insulation & short-circuit prevention

It forms a reliable insulating barrier between cells to eliminate short-circuit risks caused by shell contact

Electrical insulation & short-circuit prevention
Durable environmental protection

Resists vibration, extreme temperature, humidity and electrolyte corrosion to ensure long-term stable operation of batteries

Durable environmental protection
Compliant quality assurance

Halogen-free and eco-friendly, certified to automotive-grade standards, compatible with production requirements of high-end batteries

Compliant quality assurance

Features

Automotive-grade stable & reliable performance

Resists deformation and loosening under temperature cycling, withstands electrolyte corrosion, featuring high mechanical strength and impact resistance
Safe, eco-friendly & fully compliant

Manufactured under IATF 16949 certification; halogen-free, fully meets RoHS and REACH requirements for green and safe application
Full-range sizes & customizable solutions

Covers mainstream diameters from Φ9.5 mm to Φ63.5 mm, customizable in color, printing and automatic packaging process

Performance Indicators

Project Item	Testing method	Standard
Thermal properties
melting point Melting point	DSC	≥220℃
Mechanical properties
Tensile strength Tensile strength	ASTM D638	≥20MPa
Elongation at break Elongation at break	ASTM D638	≥200%
Electrical properties
Voltage resistance Voltage resistance	GB/T7113.2	AC 1.5 kV, 1 min No breakdown
dielectric breakdown strength Insulation failure strength	GB/T7113.2	≥4kV/0.1mm
Volume resistivity Volume resistivity	GB/T 1410	≥1.0×10¹² Ω·cm
Surface resistivity Surface resistivity	GB/T 1410	≥1.0×10⁹ Ω·cm
Other characteristics
Density	GB/T1033-86	1.2~1.4g/cm³

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Key Technology Performance Overview

project	Performance Description
Core Material	Polyethylene Terephthalate (PET)
Core Process	Heat shrinkage (tightly wraps after heating)
Key Certification	IATF 16949 system certification, halogen‑free, compliant with RoHS and REACH
Electrical Safety	Dielectric breakdown strength ≥ 4kV/0.1mm, ultra‑high volume resistivity (≥1.0×10¹² Ω·cm)
Mechanical properties	Tensile strength ≥20MPa, flexible and impact‑resistant
Environmental stability	Resists deformation during high‑low temperature cycling and withstands corrosion impact
Adaptation Specifications	Φ9.5mm ~ Φ63.5mm (covers mainstream battery sizes, customization supported)
Shrinkage performance	The transverse shrinkage rate is approximately 44‑52%, the longitudinal shrinkage rate is approximately 5‑11%, with high flatness.

Product Specifications

Specifications	(mm)Folding width	(mm)Thickness	(%)Longitudinal shrinkable ratio	(%)Lateral shrinkable ratio
Φ9.5	16.0 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ10	17.0 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ13.5	22.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ14	23.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ16	26.7 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ17.5	29.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ18	29.8 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ21	34.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ21.5	35.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ22	36.2 ± 0.3	0.08 ± 0.02	48 ± 4	8 ± 3
Φ25.3	42.5 ± 0.3	0.08 ± 0.02	48 ± 4	8 ± 3
Φ25.4	43.0 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ32	52.0 ± 0.5	0.10 ± 0.02	46 ± 4	8 ± 3
Φ32.5	52.5 ± 0.5	0.10 ± 0.02	46 ± 4	8 ± 3
Φ33	53.0 ± 0.5	0.12 ± 0.025	46 ± 4	8 ± 3
Φ40	65.0 ± 0.5	0.12 ± 0.025	46 ± 4	12 ± 3
Φ46.4	74.5 ± 0.5	0.12 ± 0.03	46 ± 4	12 ± 3
Φ60	96.0 ± 1.0	0.12 ± 0.03	46 ± 4	12 ± 3
Φ63.5	105.0 ± 1.0	0.12 ± 0.03	46 ± 4	12 ± 3

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Application Areas

Cylindrical lithium-ion batteries

Insulation wrapping for consumer and power cells such as 18650, 21700, 46800, 60138
Battery PACK modules

Cell isolation inside modules and integral protection for small-sized modules
Cylindrical energy devices

Other cylindrical energy storage components requiring high-level insulation protection

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