Products and Services PET Product SeriesPET Heat Shrink Tubing for Capacitors

PET Heat Shrink Tubing for Capacitors

PET heat shrink tubing for capacitors is a high-performance eco-friendly polyester insulating protective material, specially designed for electrolytic capacitors and supercapacitors.It shrinks uniformly upon heating to tightly wrap the capacitor body, integrating insulation, moisture resistance, dust resistance, mechanical protection and appearance marking in one product. It delivers reliable full-lifecycle protection for precision electronic components, and greatly improves their stability and service life under harsh working environments.

Want to learn more about the solutions? Want to see the complete case study?

Core Features

Electrical Insulation Protection

Forms a reliable insulating barrier to prevent external short circuits and guarantee circuit safety

Electrical Insulation Protection
Environmental Isolation Protection

Resists erosion from moisture, dust and chemical gases to avoid electrochemical corrosion

Environmental Isolation Protection
Mechanical & Appearance Protection

Prevents bumps and scratches; supports color coding and printed marking for easy classification and management

Mechanical & Appearance Protection

Features

Extra-long durability & stability

Resists high temperature & high humidity, thermal shock; maintains long-term integrity without cracking or peeling under harsh working conditions
Eco-friendly & compliant safety

Halogen-free formulation, compliant with RoHS and REACH standards, ideal for high-end export applications
Full-size range & customizable

Full coverage of sizes from Φ3 mm to Φ89 mm, flexible custom colors and printing, compatible with automated production lines

Performance Indicators

Item	Testing method	Standard
Thermal properties
熔点 Melting point	DSC	≥210℃
Mechanical properties
Tensile strength	ASTM D638	≥20MPa
Elongation at break	ASTM D638	≥200%
Electrical properties
Voltage resistance	GB/T7113.2	AC 2kV，1min No breakdown
Insulation failure strength	GB/T7113.2	≥2kV/0.1mm
Volume resistivity	GB/T 1410	≥1.0×10¹² Ω·cm
Surface resistivity	GB/T 1410	≥1.0×10⁹ Ω·cm
High-temperature-tolerance character
Temperature 85℃ / Humidity 85%	GB/T 5170.5	≥500H
High temperature storage at 120℃	GB/T 7141	≥2000H

Swipe Left or Right to View the Full Table

Key Technology Performance Overview

Project	Performance Description
Core Material	Environment‑friendly Polyester (PET)
Core Process	Heat shrinkage (uniform and tight wrapping upon heating)
Environmental certification	Halogen‑free, compliant with RoHS and REACH
Electrical Safety	Withstand voltage ≥ AC 2kV/min, high dielectric strength
High temperature and high humidity resistance	85℃/85%RH ≥ 500 hours
High‑temperature aging resistance	125℃ ≥ 2000 hours
Mechanical properties	Tensile strength ≥20MPa, flexible and sturdy
Specification Range	Φ3mm ~ Φ89mm (full‑range and custom specifications supported)
Shrinkage performance	The transverse shrinkage rate is approximately 45‑52%, and the longitudinal shrinkage rate is approximately 5‑11%.

Product Specifications

Specifications	(mm)Folding width	(mm)Thickness	(%) Longitudinal shrinkable ratio	(%)Lateral shrinkable ratio
Φ3	5.5 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ4	7.1 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ5	9.0 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ6	10.6 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ6.3	11.0 ± 0.2	0.08 ± 0.02	48 ± 4	8 ± 3
Φ8	14.0 ± 0.2	0.10 ± 0.02	48 ± 4	8 ± 3
Φ10	17.0 ± 0.2	0.10 ± 0.02	48 ± 4	8 ± 3
Φ10.2	17.3 ± 0.2	0.10 ± 0.02	48 ± 4	8 ± 3
Φ12	20.4 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ12.5	21.5 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ13	21.7 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ13.5	22.5 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ14.5	24.5 ± 0.3	0.10 ± 0.02	48 ± 4	8 ± 3
Φ16	26.7 ± 0.3	0.11 ± 0.025	46 ± 4	8 ± 3
Φ18	29.8 ± 0.3	0.11 ± 0.025	46 ± 4	8 ± 3
Φ20	32.9 ± 0.3	0.11 ± 0.025	46 ± 4	8 ± 3
Φ22	36.2 ± 0.3	0.11 ± 0.025	46 ± 4	8 ± 3
Φ25	41.1 ± 0.5	0.12 ± 0.03	46 ± 4	8 ± 3
Φ30	49.1 ± 0.5	0.12 ± 0.03	46 ± 4	8 ± 3
Φ35	56.7 ± 0.5	0.12 ± 0.03	46 ± 4	8 ± 3
Φ40	65.0 ± 1.0	0.12 ± 0.03	45 ± 5	12 ± 5
Φ45	72.0 ± 1.0	0.12 ± 0.03	45 ± 5	12 ± 5
Φ50	85.0 ± 1.5	0.12 ± 0.03	45 ± 5	12 ± 5
Φ52	88.5 ± 1.5	0.12 ± 0.03	45 ± 5	12 ± 5
Φ60	96.0 ± 1.5	0.12 ± 0.03	45 ± 5	12 ± 5
Φ63.5	105.0 ± 1.5	0.13 ± 0.04	45 ± 5	12 ± 5
Φ76	126.0 ± 2.0	0.15 ± 0.04	45 ± 5	12 ± 5
Φ89	145.0 ± 2.0	0.15 ± 0.04	45 ± 5	12 ± 5

Swipe Left or Right to View the Full Table

Application Areas

Electrolytic Capacitors

Insulation wrapping for switching power supplies, inverters, lighting electronics
Supercapacitors

Protective covering for new energy vehicles, energy storage systems
Cylindrical Components

All types of cylindrical electronic components requiring insulation protection

Want to Learn More About These Application Scenarios?

Get Quotation

Manager Zhang

Consult Now for Customized Solutions

Our professional team provides 24/7 support for you.

I confirm that I have read, understood and agree to Terms of Service，and agree to Privacy Policy.