custom polyolefin Single Wall heat shrink tubing
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.
Experience the superior performance of our premium Single Wall Heat Shrink Tube. To achieve impeccable full shrinkage, careful attention and precision are key. Utilize a forced-air constant-temperature oven, meticulously setting the shrinkage temperature to an exact 125°C. Initially, you may observe a temperature dip when the heat-shrinkable sleeve is introduced to the oven. Patience is essential as the oven stabilizes and reaches the ideal temperature. This calculated process ensures the sleeve reaches its ultimate shrinkage temperature, aided by the efficient circulation of hot air within the oven. To achieve optimal results, maintain the oven's actual temperature at the set point for a consistent 3-minute period, ensuring the sleeve attains its perfect shrinkage form.
8. Application Field
8.1 Insulation protection tailored for the complex internal wiring of electronic devices
8.2 Insulation protection for electronics internal wiring
8.3 Safeguard your communication cables, ensuring they remain waterproof and dust-proof, maintaining reliability under diverse conditions
8.4 Dependable protection for household wire connections, offering peace of mind and safety
8.5 Versatile materials perfect for creative DIY jewelry making projects, combining practicality with artful expression
Company Profile
Dongguan Zhonghe Electronics Co., Ltd. stands as a beacon of innovation and technological excellence, renowned globally for its profound expertise in polymer modified protective materials. Since its inception in 2010, this trailblazing enterprise has been dedicated to crafting and marketing cutting-edge solutions from its strategic headquarters in the vibrant innovation hub of Qingxi Town, Dongguan City. The company's unwavering commitment to growth and technological prowess is embodied in the launch of a state-of-the-art branch in Jiangsu in 2020, spanning 15,000 square meters, a testament to its relentless pursuit of advancement.
Embodying a philosophy that harmonizes unity and mutually rewarding cooperation, Dongguan Zhonghe Electronics Co., Ltd. dedicates itself to 'escorting the Internet of Things' through crafting unparalleled value and delivering joy to cherished customers. We extend a warm invitation to both domestic and international clients to experience our facilities firsthand and embark on mutually beneficial negotiations and collaborations that promise success and innovation!
Currently, our company boasts an extensive service reach across 102 countries, catering to a diverse and robust clientele of over 3,000 esteemed customers. Our exceptional manufacturing capabilities allow us to produce protective sleeves annually that stretch far enough to encircle the Earth three times, with an impressive 60 million meters specifically tailored for the automotive industry. This unwavering commitment to quality and excellence has positioned us as a trusted long-term partner to numerous automobile OEMs and globally renowned corporations.
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 field, Dongguan Zhonghe Electronics Co., Ltd. is your trusted partner, delivering superior quality and unparalleled service!
2. Our state-of-the-art research and development team specializes in designing customized solutions, perfectly suited to fulfill the distinct requirements of each customer, ensuring satisfaction and innovation!
3. Committed to excellence, our dedicated professional sales team ensures you receive outstanding service, guiding you through every step with expertise and care!
02 : What's the MOQ for your production?
A: From large-scale orders to smaller requests, our flexible production line caters to all needs. Contact us to discuss your specific requirements and we will accommodate with ease.
03: Can I expect to get the sample?How long can I expect to get it?
A: Absolutely! We offer complimentary samples to ensure satisfaction and meet your testing requirements. Expect delivery within an efficient 4-6 days.
Shipment times may vary depending on your location and chosen courier service, ensuring timely arrival.
04 : Can you do the design for us?
A: Yes, indeed! As a professional manufacturer, we possess the capability and expertise to fulfill your design requirements, turning your creative visions into reality with precision and elegance.
05 : What's your payment term?
A: We operate with a straightforward payment structure of a 30% T/T deposit, with the remaining balance due before shipment, ensuring a smooth and secure transaction.
06 : What's the list of certificates you hold?
A: We proudly hold an array of prestigious certificates including IATF16949, RoHS, CE, EN45545 Test Report, and ELV Test report, assuring you of our commitment to compliance and the highest quality standards.