High-Quality electrical Single Wall Heat Shrink Tube
Heat shrink tubeThis exceptional product, also known as heat shrinkable tubing, is meticulously engineered from cutting-edge polymer materials. Its hallmark feature is its remarkable capability to snugly contract around encased objects upon exposure to heat. At Dongguan Zhonghe Electronics Co., Ltd, our heat shrink tubes are expertly crafted using premium polyolefin, fluoroplastic, silicone rubber, and polyester. Each material endows the tubing with unique and impressive attributes, enabling our heat shrink tubes to meet the varied and stringent demands across multiple industries.
Table 1: Performance characteristics of HF Flame Retardant Heat Shrink Tube
Property |
Testing Method |
Performance index |
Physical property |
Tensile strength/MPa |
GB/T1040 |
≥10.4 |
|
Elongation at break/% |
GB/T1040 |
≥200 |
|
Tensile strength after thermal aging/MPa |
UL224;158ºC×168hr |
≥7.3 |
|
Elongation at break after thermal aging/% |
UL224;158ºC×168hr |
≥100 |
|
Heat shock resistance |
UL224;250ºC×4hr |
Not sticky, non-cracked |
|
Cold bending resistance |
UL224;-30ºC×1hr |
non-cracked |
|
Electrical performance |
Withstand voltage |
300V |
UL224 |
1500V,1min no breakdown |
|
600V |
UL224 |
2500V,1min no breakdown |
|
Breakdown strength/KV/mm |
GB/T1408 |
≥15 |
|
Volume resistivity/Ω•cm |
GB/T1410 |
≥1×1014 |
|
Chemical property |
Copper stability |
UL224;158ºC×168hr |
PASS |
|
Corrosion resistance |
UL224;158ºC×168hr |
PASS |
|
Flame retardancy |
UL224 |
☆ |
|
Important Note: ☆ signifies that the flame retardant performance in yellow and white requires enhancement, and the transparent heat shrink tube is non-flame retardant.
Table 2: Product Dimensions of H-CB Tube
(HF Flame Retardant Thin Wall Heat Shrinkable Tube)
Size (mm) |
Preshrink Size(mm) |
Size after Shrinkag(mm) |
Pack |
Range of Application (mm) |
Inter Diameter |
Wall Thickness |
Inter Diameter |
Wall Thickness |
Φ0.6CB |
0.9±0.2 |
0.13±0.05 |
≤0.40 |
0.20±0.10 |
200 |
0.4~0.7 |
Φ0.8CB |
1.1±0.2 |
0.13±0.05 |
≤0.50 |
0.20±0.10 |
200 |
0.6~0.8 |
Φ1.0CB |
1.40±0.2 |
0.13±0.05 |
≤0.65 |
0.20±0.10 |
200 |
0.7~1.0 |
Φ1.5CB |
1.90±0.2 |
0.13±0.05 |
≤0.85 |
0.20±0.10 |
200 |
0.9~1.4 |
Φ2.0CB |
2.40±0.2 |
0.13±0.05 |
≤1.00 |
0.22±0.10 |
200 |
1.1~1.8 |
Φ2.5CB |
2.90±0.2 |
0.13±0.05 |
≤1.30 |
0.25±0.10 |
200 |
1.4~2.3 |
Φ3.0CB |
3.40±0.2 |
0.13±0.05 |
≤1.50 |
0.28±0.10 |
200 |
1.6~2.7 |
Φ3.5CB |
3.90±0.2 |
0.13±0.05 |
≤1.80 |
0.28±0.10 |
200 |
1.9~3.2 |
Φ4.0CB |
4.40±0.2 |
0.15±0.05 |
≤2.00 |
0.30±0.10 |
200 |
2.1~3.6 |
Φ4.5CB |
4.90±0.2 |
0.15±0.05 |
≤2.30 |
0.30±0.10 |
100 |
2.4~4.0 |
Φ5.0CB |
5.50±0.2 |
0.15±0.05 |
≤2.5 |
0.32±0.10 |
100 |
2.6~4.5 |
Φ6.0CB |
6.50±0.2 |
0.15±0.05 |
≤3.0 |
0.32±0.10 |
100 |
3.1~5.4 |
Φ7CB |
7.50±0.3 |
0.15±0.05 |
≤3.5 |
0.32±0.10 |
200 |
3.7~6.3 |
Φ8CB |
8.50±0.3 |
0.15±0.05 |
≤4.0 |
0.32±0.10 |
200 |
4.2~7.2 |
Φ9CB |
9.50±0.3 |
0.15±0.05 |
≤4.5 |
0.35±0.10 |
200 |
4.7~8.0 |
Φ10CB |
10.5±0.3 |
0.15±0.05 |
≤5.0 |
0.35±0.10 |
200 |
5.2~9.0 |
Φ11CB |
11.5±0.3 |
0.18±0.05 |
≤5.5 |
0.40±0.10 |
200 |
5.7~10.0 |
Φ12CB |
12.5±0.3 |
0.20±0.05 |
≤6.0 |
0.40±0.10 |
200 |
6.2~11.0 |
Φ13CB |
13.5±0.3 |
0.20±0.05 |
≤6.5 |
0.40±0.10 |
200 |
6.7~12.0 |
Φ14CB |
14.5±0.3 |
0.20±0.05 |
≤7.0 |
0.40±0.10 |
200 |
7.3~13.0 |
Φ15CB |
15.5±0.4 |
0.20±0.05 |
≤7.5 |
0.40±0.10 |
200 |
7.8~14.0 |
Φ16CB |
16.5±0.4 |
0.22±0.05 |
≤8.0 |
0.40±0.10 |
200 |
8.3~15.0 |
Φ17CB |
17.5±0.4 |
0.22±0.05 |
≤8.5 |
0.40±0.10 |
200 |
8.8~16.0 |
Φ18CB |
18.5±0.4 |
0.22±0.05 |
≤9.0 |
0.42±0.10 |
200 |
9.3~17.0 |
Φ20CB |
20.5±0.5 |
0.25±0.05 |
≤10.0 |
0.45±0.10 |
200 |
10.5~19.0 |
Φ22CB |
22.5±0.5 |
0.25±0.05 |
≤11.0 |
0.45±0.10 |
200 |
11.5~20.5 |
Φ25CB |
25.5±0.5 |
0.25±0.05 |
≤12.5 |
0.45±0.10 |
100 |
13.0~24.0 |
Φ28CB |
28.5±0.5 |
0.30±0.08 |
≤14.0 |
0.60±0.10 |
100 |
14.5~27.0 |
Table 3 Product Dimensions Applicable for H tube (HF Flame Retardant Heat Shrink Tube)
Size (mm) |
Preshrink Size (mm) |
Size after Shrinkag(mm) |
Old packaging |
New packaging |
Range of Application (mm) |
Inter Diameter |
Wall Thickness |
Max Inter Diameter |
Wall Thickness |
Meter/Roll |
Φ0.5 |
0.8±0.2 |
0.18±0.05 |
≤0.30 |
0.33±0.10 |
400 |
400 |
0.3~0.6 |
Φ0.6 |
0.9±0.2 |
0.18±0.05 |
≤0.40 |
0.33±0.10 |
200 |
400 |
0.4~0.7 |
Φ0.8 |
1.1±0.2 |
0.18±0.05 |
≤0.50 |
0.33±0.10 |
200 |
400 |
0.6~0.8 |
Φ1.0 |
1.5±0.2 |
0.20±0.05 |
≤0.65 |
0.36±0.10 |
200 |
400 |
0.75~0.9 |
Φ1.5 |
2.0±0.2 |
0.20±0.05 |
≤0.85 |
0.36±0.10 |
200 |
400 |
0.95~1.4 |
Φ2.0 |
2.5±0.2 |
0.20±0.05 |
≤1.00 |
0.45±0.10 |
200 |
400 |
1.1~1.8 |
Φ2.5 |
3.0±0.2 |
0.20±0.05 |
≤1.30 |
0.45±0.10 |
200 |
400 |
1.35~2.3 |
Φ3.0 |
3.5±0.2 |
0.20±0.05 |
≤1.50 |
0.45±0.10 |
200 |
400 |
1.6~2.7 |
Φ3.5 |
4.0±0.2 |
0.23±0.05 |
≤1.80 |
0.45±0.10 |
200 |
400 |
1.85~3.2 |
Φ4.0 |
4.7±0.2 |
0.25±0.05 |
≤2.00 |
0.45±0.10 |
200 |
400 |
2.1~3.6 |
Φ4.5 |
5.0±0.2 |
0.28±0.05 |
≤2.30 |
0.56±0.10 |
100 |
200 |
2.35~4.0 |
Φ5.0 |
5.5±0.2 |
0.28±0.05 |
≤2.50 |
0.56±0.10 |
100 |
200 |
2.6~4.5 |
Φ5.5 |
6.0±0.2 |
0.28±0.05 |
≤2.80 |
0.56±0.10 |
100 |
200 |
2.9~5.0 |
Φ6.0 |
6.5±0.2 |
0.28±0.05 |
≤3.00 |
0.56±0.10 |
100 |
200 |
3.1~5.4 |
Φ7.0 |
7.5±0.3 |
0.30±0.05 |
≤3.50 |
0.56±0.10 |
100 |
100 |
3.7~6.3 |
Φ8.0 |
8.5±0.3 |
0.30±0.05 |
≤4.00 |
0.56±0.10 |
100 |
100 |
4.2~7.2 |
Φ9.0 |
9.5±0.3 |
0.30±0.08 |
≤4.50 |
0.56±0.10 |
100 |
100 |
4.7~8.0 |
Φ10 |
10.5±0.3 |
0.30±0.08 |
≤5.00 |
0.56±0.10 |
100 |
100 |
5.2~9.0 |
Φ11 |
11.5±0.3 |
0.30±0.08 |
≤5.50 |
0.56±0.10 |
100 |
100 |
5.7~10 |
Φ12 |
12.5±0.3 |
0.30±0.08 |
≤6.00 |
0.56±0.10 |
100 |
100 |
6.2~11 |
Φ13 |
13.5±0.3 |
0.35±0.10 |
≤6.50 |
0.56±0.10 |
100 |
100 |
6.7~12 |
Φ14 |
14.5±0.3 |
0.35±0.10 |
≤7.00 |
0.70±0.10 |
100 |
100 |
7.3~13 |
Φ15 |
15.5±0.4 |
0.35±0.10 |
≤7.50 |
0.70±0.10 |
100 |
100 |
7.8~14 |
Φ16 |
16.5±0.4 |
0.35±0.10 |
≤8.00 |
0.70±0.10 |
100 |
100 |
8.3~15 |
Φ17 |
17.5±0.4 |
0.35±0.10 |
≤8.50 |
0.70±0.10 |
100 |
100 |
8.8~16 |
Φ18 |
19.0±0.5 |
0.35±0.10 |
≤9.00 |
0.70±0.10 |
100 |
100 |
9.3~17 |
Φ20 |
22.0±0.5 |
0.40±0.12 |
≤10.00 |
0.83±0.15 |
100 |
100 |
10.4~19 |
Φ22 |
24.0±0.5 |
0.40±0.12 |
≤11.00 |
0.83±0.15 |
100 |
100 |
11.4~21 |
Φ25 |
26.0±0.5 |
0.45±0.12 |
≤12.50 |
0.90±0.15 |
50 |
50 |
12.8~24 |
Φ28 |
29.0±0.5 |
0.45±0.12 |
≤14.00 |
0.90±0.15 |
50 |
50 |
14.4~29 |
Φ30 |
31.5±1.0 |
0.45±0.12 |
≤15.00 |
1.00±0.15 |
50 |
50 |
16~29 |
Φ35 |
36.5±1.0 |
0.45±0.12 |
≤17.50 |
1.00±0.15 |
50 |
50 |
18~34 |
Φ40 |
41.5±1.0 |
0.50±0.15 |
≤20.00 |
1.00±0.15 |
50 |
50 |
21~39 |
Φ45 |
46.5±1.0 |
0.50±0.15 |
≤22.5 |
1.00±0.20 |
25 |
25 |
23.5~44 |
Φ50 |
≥50 |
0.50±0.15 |
≤25.0 |
1.00±0.20 |
25 |
25 |
26~49 |
Φ60 |
≥60 |
0.60±0.15 |
≤30.0 |
1.30±0.25 |
25 |
25 |
35-55 |
Φ70 |
≥70 |
0.65±0.15 |
≤36.0 |
1.30±0.25 |
25 |
25 |
40-65 |
Φ80 |
≥80 |
0.70±0.18 |
≤41.0 |
1.46±0.30 |
25 |
25 |
45-75 |
Φ90 |
≥90 |
0.70±0.18 |
≤46.0 |
1.46±0.30 |
25 |
25 |
50-88 |
Note: Φ30 and above specification products default to G tube, meeting the environmental performance standards in compliance with EU RoHS2.0 (2011/65/EU standard).
1. Operating Conditions
1.1 Continuous use in ambient temperatures ranging from a brisk -55°C to a toasty 125°C.
1.2 Exceptionally robust for prolonged use in both acidic and alkaline environments.
1.3 Engineered for sustained use under rigorous environmental protection guidelines.
2. Appearance Requirements
2.1 The product surface must be pristine, devoid of noticeable scratches, uneven textures, or bamboo-joint-like imperfections.
2.2 The exterior finish is expected to be flawlessly smooth, devoid of oil stains and free from dust accumulation.
2.3 Impeccable printing quality is ensured with no ghosting, excess ink, incomplete prints, or slippage.
3. Heat Shrinkage Performance
3.1 Commencing shrinkage kicks in at 70°C; complete shrinkage is achieved at 125°C.
Conforming to UL224 standards, full-shrinkage temperature is set at 200°C, accomplished within 3 minutes.
3.2 The rate of longitudinal shrinkage remains within a precise ±5%.
4. Performance Characteristics of Materials
The materials' physical and chemical properties are strictly aligned with the stipulations in Table 1.
The dimensions for halogen-free, flame-retardant, thin-wall heat-shrinkable sleeves adhere precisely to the specifications outlined in Table 2.
The dimensions for halogen-free, flame-retardant heat-shrinkable sleeves faithfully follow the guidelines specified in Table 3.
Standard colors available include black, red, blue, yellow, green, and white. Customization is possible for other colors such as purple, gray, brown, etc., tailored to customer preferences.
When utilizing our premium heat-shrinkable sleeve, precision is paramount to ensure complete shrinkage. To achieve the best performance, we recommend using a forced-air constant-temperature oven, meticulously setting the shrinkage temperature at 125°C. Be mindful that upon inserting the heat-shrinkable sleeve into the oven, there might be an initial temperature dip. Patiently allow the oven to return to the designated temperature. During this phase, the sleeve will gradually reach its optimal shrinkage temperature, aided by the circulating hot air within the oven. The sleeve will attain full shrinkage once the oven consistently maintains the target temperature for a steadfast duration of three minutes.
8. Application Field
8.1 Our high-quality sleeve provides exceptional insulation protection for the delicate and intricate internal wiring of sophisticated electronics.
8.2 Insulation protection for electronics internal wiring
8.3 Guarantee communication cables remain waterproof and dust-proof, ensuring longevity and reliability even in challenging environments.
8.4 Offers dependable protection for household wire connections, safeguarding against potential hazards.
8.5 Boasting versatility, the materials are perfect for DIY jewelry making, allowing for creative and unique designs.
Company Profile
Dongguan Zhonghe Electronics Co., Ltd. is a pioneering leader in the world of technology-driven enterprises, celebrated for its groundbreaking prowess in the development, manufacture, and marketing of polymer-modified protective materials. With an unwavering commitment to providing all-encompassing one-stop solutions, the company was founded in 2010 and is strategically nestled in the vibrant heart of innovation in Qingxi Town, Dongguan City. Demonstrating its ever-expanding reach and dedication to technological excellence, a cutting-edge branch factory was launched in Jiangsu in 2020. This factory, sprawling over a remarkable 15,000 square meters, embodies the company's relentless growth and commitment to pushing the boundaries of technology.
Driven by a business philosophy that perfectly aligns with its distinguished name, Dongguan Zhonghe Electronics Co., Ltd. upholds the ideals of unity and mutually rewarding cooperation. Every member of the team is passionately committed to the mission of 'escorting the Internet of Things,' working tirelessly to create value and bring delight to our cherished customers. We extend a warm invitation and eagerly anticipate the opportunity to welcome both domestic and international clients to our facilities for productive negotiations and enriching collaborations!
Currently, the company takes immense pride in offering its exceptional services to an impressive clientele spanning 102 countries worldwide, boasting a robust customer base surpassing 3,000. Each year, the protective sleeves we produce are enough to circle the Earth three times, with an astounding 60 million meters specifically dedicated to the automotive industry. Our unwavering dedication to excellence has solidified our reputation as a trusted long-term supplier to numerous automotive OEMs and globally renowned enterprises.
Certifications
Zhonghe Electronics proudly boasts an impressive array of certifications, including the esteemed ISO9001, IATF16949 quality management system, and the rigorous ISO14001 environmental management system certification. Our state-of-the-art production management integrates an advanced MES system, ensuring unparalleled product uniformity and reducing losses by an impressive 5% compared to industry standards. Our commitment to innovation is reflected in our dedicated professional R&D team and cutting-edge laboratory, housing 5 prestigious invention patents and 18 utility model patents. Every year, we introduce 3 to 5 groundbreaking new products, meticulously crafted to exceed customer expectations and meet their evolving needs.
Exhibition & Our Partners

Packaging & Shipping
01 : Why choose us?
A:1. With over 15 years of unmatched expertise in the electronics industry, we guarantee you top-of-the-line quality and unparalleled service!
2. Our state-of-the-art research and development team specializes in creating tailored solutions that perfectly align with the unique needs of our clientele!
3. Our committed and professional sales team is dedicated to providing you with outstanding service every step of the way!
02 : What's the MOQ for your production?
A: No matter the size of your order, we are adaptable and eager to meet your needs. Feel free to contact us for more information.
03: Can I expect to get the sample?How long can I expect to get it?
A: Certainly, we offer free samples for testing purposes. Expect delivery within approximately 4-6 days.
Shipment times depend on the distance and the courier service chosen.
04 : Can you do the design for us?
A: Indeed, as a leading manufacturer, we possess the full capabilities to fulfill your design requirements and realize your creative vision.
05 : What's your payment term?
A: Our payment terms require a 30% T/T deposit, with the remaining balance settled before shipment.
06 : What's the list of certificates you hold?
A: We proudly hold IATF16949, RoHS, CE, EN45545 Test Report, and ELV Test report credentials, ensuring top-tier compliance and quality assurance.