| 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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| 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 
| Property | Unit | Performance requirements | Testing method | |
| Operating Temperature Range | ºC | -40~125 | UL224 | |
| Longitudinal change | % | 0~10 | ASTM D2671 /U224 | |
| Tensile strength | Mpa | ≥10.4 | ASTM D2671 | |
| Breakage elongation | % | ≥200 | ASTM D2671 | |
| Cold impact : 4H, -40±2°C | \ | No crack | UL224 | |
| Heat Shock : 4 H, 250±3°C (only jacket) | \ | No drip, no flow, no crack | UL224 | |
| Heat aging (only jacket) 168H, 175±2°C |
Tensile strength | Mpa | ≥7.3 | UL224 |
| Breakage elongation | % | ≥100 | UL224 | |
| Volume resistivity | Ohm-cm | ≥1 x 1012 | ASTM D2671 | |
| Copper corrosion | / | 158ºC,168h,Pass | UL224 | |
| water absorption | % | ≤1.0% | ASDM D570 | |
Size |
Length(mm) | As supplied (mm) | After unrestricted shrinkage (mm) | ||
| ID MIN (C) |
Preshrink seal length MIN(F) | ID MAX (D) |
total thickness (W) | ||
| 3.2 | 25 | 3.2 | 4.0 | ≤1.00 | 1.00±0.10 |
| 5.75 | 40 | 5.75 | 4.0 | ≤1.27 | 1.50±0.15 |
| 7.4 | 35 | 7.4 | 5.0 | ≤1.65 | 1.80±0.20 |
| 10.8 | 45 | 10.8 | 5.0 | ≤2.40 | 2.10±0.30 |
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 a 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, and PTFE. 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 standards.
In addition to our standard product range, we also offer customization and development of products with special requirements according to customer needs. Our production adheres to ISO9001 and IATF16949 quality management system standards, ensuring the stability and reliability of product quality.
Shanghai Wellco International Limited is a professional manufacturer based in Shanghai, China. Since 2017, we have been specializing in the production and sales of special heat shrink tubes and other radiation crosslinking insulation materials. With over 20 years of experience in insulation, our founder has established a reputation for delivering high-quality products.
We prioritize quality and ensure that every product meets our standards. Before mass production, we always provide a pre-production sample for approval. Additionally, a final inspection is conducted before shipment to guarantee the quality of our products.
At Shanghai Wellco International Limited, we offer a wide range of products including heat shrink tubes, heat shrink mould parts, marking sleeves, and cold shrink tubes. Our products are designed to provide efficient insulation and meet various industry requirements.
When it comes to purchasing insulation materials, there are several reasons why you should choose us over other suppliers. Our company has a strong focus on research and development, ensuring that our products are innovative and of the highest quality. With our extensive experience in the industry, we have gained the trust of customers worldwide.
We are committed to providing excellent services to our customers. We accept various delivery terms, including FOB, CFR, CIF, EXW, CIP, FCA, DDP, DDU, and express delivery. Our accepted payment currencies are USD, EUR, and CNY, and we offer flexible payment options such as T/T, L/C, MoneyGram, PayPal, and Western Union. Our team is fluent in English, Chinese, and Japanese, ensuring effective communication throughout the buying process.
Suppliers with verified business licenses
Audited Supplier 
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