| Application: | Insulators |
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| Type: | Insulation Sleeve |
| Chemistry: | Organic Insulation |
| Samples: |
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| Customization: |
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Shipping Cost:
Estimated freight per unit. |
about shipping cost and estimated delivery time. |
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| Payment Method: |
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| Initial Payment Full Payment |
| Currency: | US$ |
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| Return&refunds: | You can apply for a refund up to 30 days after receipt of the products. |
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Suppliers with verified business licenses
Audited Supplier 
Operating Temperature: -55ºC to 125ºC
Minimum Shrink Temperature: 70ºC
Minimum Fully Recovery Temperature: 120ºC
Shrink Ratio: 2:1
This product is widely used in electronics, subways, buildings, public facilities, and other industries where reliable insulation and protection are required.
For more information, please contact Shanghai Wellco International Limited.
| Test Items | Test Methods | Performance |
| Temperature Rating | UL224 | 125ºC |
| Length Rate Of Change | ASTM D2671 | -5ºC~+5ºC |
| Tensile Strength | ASTM D638 | ≥10.4MPa |
| Breaking Elongation | ASTM D638 | ≥200% |
| Hot Air Aging Test | 158.0ºC/168h | - |
| Thermal Aging Tensile Strength | ASTM D638 | ≥7.3MPa |
| Heat Aging Breaking Elongation | ASTM D638 | ≥100% |
| Voltage Level | UL224 | 300V/600V |
| Volume Resistivity | ASTM D2671 | ≥1.0x1012cm |
| Breakdown Voltage | UL224 | 2500V(60s) No Breakdown |
| Thermal Stock | UL224/250ºC±3ºC/4h | Does not drip, Does not flow, Does not crack |
| With heart | ASTM D2671 | ≥70% |
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Size
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Dimension before shrinkage(mm)
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Dimension After shrinked(mm)
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Diameter(D)
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Wall Thickness(T)
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Diameter(d)
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Wall Thickness(t)
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2.0
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2.5+0.2/-0.1
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0.20±0.05
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≤1.00
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0.42±0.08
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2.5
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3.0+0.2/-0.1
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0.22±0.05
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≤1.25
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0.46±0.08
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3.0
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3.5+0.2/-0.1
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0.22±0.05
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≤1.50
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0.46±0.08
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3.5
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4.0+0.2/-0.1
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0.22±0.05
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≤1.75
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0.46±0.08
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4.0
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4.6+0.2/-0.1
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0.22±0.05
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≤2.00
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0.46±0.08
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4.5
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5.0+0.2/-0.1
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0.23±0.05
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≤2.25
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0.46±0.08
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5.0
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5.5+0.2/-0.1
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0.25±0.05
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≤2.50
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0.50±0.08
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5.5
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6.0+0.2/-0.1
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0.25±0.05
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≤2.75
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0.50±0.08
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6.0
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6.5+0.2/-0.1
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0.25±0.05
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≤3.00
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0.55±0.10
|
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6.5
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6.9+0.2/-0.1
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0.25±0.05
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≤3.25
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0.55±0.10
|
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7.0
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7.5+0.2/-0.1
|
0.25±0.05
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≤3.50
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0.55±0.10
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8.0
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8.5+0.3/-0.1
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0.28±0.06
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≤4.00
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0.58±0.10
|
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9.0
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9.5+0.2/-0.1
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0.28±0.06
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≤4.50
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0.58±0.10
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10
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10.5+0.3/-0.1
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0.28±0.06
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≤5.00
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0.58±0.10
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11
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11.5+0.3/-0.1
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0.28±0.06
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≤5.50
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0.58±0.10
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12
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12.5+0.3/-0.1
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0.28±0.06
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≤6.00
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0.58±0.10
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13
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13.5+0.3/-0.1
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0.28±0.06
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≤6.50
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0.58±0.10
|
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14
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14.5+0.3/-0.1
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0.28±0.06
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≤7.00
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0.58±0.10
|
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15
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15.5+0.3/-0.1
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0.28±0.06
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≤7.50
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0.58±0.10
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16
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16.5+0.3/-0.1
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0.28±0.06
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≤8.00
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0.58±0.10
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17
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17.5+0.3/-0.1
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0.28±0.06
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≤8.50
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0.58±0.10
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18
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18.5+0.3/-0.1
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0.32±0.08
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≤9.00
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0.68±0.10
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20
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20.6+0.5/-0.2
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0.32±0.08
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≤10.0
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0.68±0.10
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22
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22.6+0.7/-0.2
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0.35±0.08
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≤11.0
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0.72±0.12
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25
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25.6+0.7/-0.2
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0.40±0.10
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≤12.5
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0.78±0.12
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28
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28.6+0.7/-0.2
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0.40±0.10
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≤14.0
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0.78±0.12
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30
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30.6+0.7/-0.2
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0.40±0.10
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≤15.0
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0.82±0.12
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35
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35.6+0.7/-0.2
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0.45±0.10
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≤17.5
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0.92±0.12
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Note: Other sizes and colors can be available upon request
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Shanghai Wellco International Limited is a professional team with 18 years of experience in R&D, production, and sales of special heat shrink tubes and other radiation crosslinking materials. We specialize in providing a wide range of products and solutions for insulation, connection, waterproofing, high temperature resistance, chemical resistance, EMI protection, and mechanical protection for wires and cables.
With strong technical force and advanced production equipment, we offer heat shrink tubes and insulation tubes made from various materials such as modified PE, PVDF, FEP, EPDM, Silicone, FKM, FEP, PTFE, and more. Our products find extensive applications in electronic communication, automobile, high-speed rail, electric motor, aviation, medical, and other industries. They provide insulation, water-proofing, electrostatic shielding, oil resistance, chemical resistance, and high-temperature protection. Our products have passed UL certification, RoHS, and REACH.
We also specialize in producing customized products and developing products with special requirements based on customer needs. Our production processes adhere to ISO9001 and IATF16949 quality management system standards, ensuring the stability and reliability of product quality.
Shanghai Wellco International Limited is a professional manufacturer of special heat shrink tubes and other radiation crosslinking insulation materials. With over 20 years of experience in insulation, we are based in Shanghai, China and have been serving customers since 2017. Our office consists of a dedicated team of 5-10 people.
We prioritize quality and ensure it through various measures:
At Shanghai Wellco International Limited, we offer a range of high-quality products:
There are several reasons why you should buy from us:
We offer the following services:
Suppliers with verified business licenses
Audited Supplier 
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