Dual Wall Heat Shrink Tubes
- CCMT
- CHANGCHUN,CHINA
- Based on the order quantity
- 5 million meters per month
1. The adhesive-lined heat shrink tube has a two-layer construction that results in an extremely strong seal layer when heated and offers waterproof, waterproof, insulation and corrosion-resistant advantages.
2. Heat shrink tube with glue can form a bond with different materials like plastic, rubber as well as metal that would ensure a reliable sealing and a mechanical protection of the cables connected to each other.
3. Dual wall adhesive heat shrink is suitable for temperatures ranging from - 45℃ to 125℃ and is a good fit for various automotive, electric, electronic and industrial equipment application scenarios.
When it comes to protecting wire cables connections from wear and tear, heat shrink tubing normally gives sufficient insulation, however, sometimes it is not sufficient to ensure a complete sealing of the connections. If devices or parts get in touch with environments like humidity, high-temperature, dusty, salt-spray, or oily for long times, water or aggressive agents like those mentioned earlier might pass the gaps and cause wire corruption and also reduce the isolation properties or worse short circuits, breakdowns, and higher repair or maintenance costs.
Professional Solution:
Double layer heat shrinking pipe with glue is a perfect combination of cross linked polyolefin in the outer layer, and a highly elastic hot melt adhesive on the inner side. When heat is applied, the hot melt adhesive inside the pipe becomes very fluid and can flow into and fill all the crevices or gaps in between the cable and connector which results in a very strong bond. The outer covering which is a reliable insulating, waterproof, moisture-proof, and mechanical protection layer will prevent intrusion of moisture, dust and corrosive media effectively. We have provided a perfect and safe sealing solution for automotive wirings, power line, electronic devices and factory connections.
Product Parameters:
Property | Test Method | Standard |
Tensile Strength(MPa) | ASTM D2671 | ≥10.4MPa |
Elongation(%) | ASTM D2671 | ≥300% |
Tensile Strength after Aging (MPa) | UL224 158℃X168hr | ≥7.3MPa |
Elongation after Aging(%) | UL224 158℃X168hr | ≥200% |
Dielectric Strength(kV/mm) | IEC243 | ≥15kV/mm |
Volume Resistivity(Ω.cm) | ASTM D876 | ≥1X1014Ω.cm |
Product Advantages:
1. Excellent sealing performance, effectively resisting external environmental corrosion.
The system comprises both outer heat shrinkable polyolefin tubing and inner hot melt adhesive layers. When heat is applied, the outer heat shrink layer gets shrunk close fitting, and at the same time the inner adhesive layer gets entirely molten to occupy the spaces, making a solid bonding between the cables and the connectors, hence completely blocking the possible moisture, dust, corrosive substances coming into contact with the cables and causing damage.
2. Strong adhesion, suitable for various materials.
The layer of hot melt adhesive that forms a thick inner lining demonstrates remarkable capacity for sticking, capable of creating an inseparable bond to various materials including plastic, rubber, and metal substrates. Its versatility extends to meeting sealing requirements for different cables and connection points, offering, not only, securing fixation and protection but, also, effective insulation which in turn leads to strengthening of the connection’s stability.
3. Excellent insulation protection, enhancing cable reliability.
The outer polyethylene (PE) heat shrink tubing possesses excellent electrical insulation and mechanical protection capabilities, with a dielectric strength ≥15kV/mm (IEC243) and a volume resistivity ≥1×10¹⁴Ω·cm (ASTM D876). Covers the conductor and insulating cables with a layer that prevents them from rubbing, colliding, and being exposed to harmful external factors. The outer layer also acts as glue with which it makes a sealed layer that doubles the protection and ensures that the electrical characteristics of the cable installation remain unchanged over a very long period.
4. Excellent shrinkage performance, convenient installation, and wide applicability.
The 3:1 shrink ratio of the double-wall heat shrink makes it highly versatile, enabling it to be used with different sizes of wires, cables, connectors, and terminals, etc. The shrink begins to occur at 70℃ and is completely finished at 125℃, making it very heat effective and easy to handle. It is a fast way to perform sealing and insulation works; hence it increases work productivity and lowers the expenditure related to the installation.
5. Stable temperature resistance, adaptable to various application environments.
The adhesive-lined heat shrink tuber works well in a range of -45℃ to 125℃, keeping the sealed property, insulation as well as stickiness unchanged even under complicated conditions like extreme temperatures and humidity. After an aging test (UL224) at 158℃ for 168 hours, its tensile strength is still ≥516MPa and elongation ≥1400%, indicating excellent long-term reliability. It can be used in automotive wiring harnesses, power cables, communication equipment and electronic appliances.
Product Application Scenarios:
Automotive and New Energy Vehicles – Used for insulation, waterproofing, and sealing protection of automotive wiring harnesses, battery systems, sensors, and connectors.
Industrial Equipment and Power Systems – Suitable for cable joints, control cabinets, hydraulic and pneumatic systems, providing reliable insulation, sealing, and mechanical protection.
Marine, Communication, and Outdoor Facilities – Employed in ships, offshore platforms, communication equipment as well as outdoor electrical engineering, these products offer long-term resistance to weather conditions, protection of moistures and protection against corrosion for the cable connections.
CCMT – Your Preferred Choice for Cable Accessories.
Established in 1986, we have spent the past almost forty years devoted to the research and development and to the manufacturing of cable accessories. We have gained extensive experience in product development and have developed well-advanced manufacturing capabilities, which have allowed us to supply consistent and dependable cable accessory solutions to customers across the globe.
Our production facilities are modern with a production area of over 10,000 square meters, more than 200 trained and skilled employees, as well as over 40 production machineries.We have the following lines and are only engaged in the production of heat shrink tubing:13 plastic extrusion lines, 10 oil expansion lines and 5 air expansion lines.Through the integrated production system, our monthly production capacity for heat shrink tubing is now 5 million meters and our overall monthly production capacity also exceeds one million meters, meeting bulk purchasing requirements of both domestic and international customers.
In terms of technological R&D, we rely on the technical support of the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, to continuously optimize product performance and production processes. We have established a complete ISO 9001:2015 quality management system (No. 00123Q36311R5M/2200). Our products have obtained international certifications such as CE, SGS, and IEC, and comply with environmental regulations such as RoHS and REACH. We can also provide relevant testing reports according to customer needs, assisting customers in completing product certification and market access.
Quality control measures are embedded in the whole product manufacturing cycle. Every product type is subject to third-party tests to confirm its quality and conformity. The professional quality inspection division performs thorough quality-checking of raw material, production operations and shipping processes, delivers product test reports at each delivery point, guaranteeing consistently good performance, dependable quality, and compliance with global standards.
In addition to standard products, we can also provide OEM and customized services based on customer technical requirements, drawings, or application scenarios, offering more flexible product solutions for different markets and projects.
Global Cooperation and Export Experience:
We have developed long-term cooperation with customers from numerous countries of the world. Our products are exported to the Middle East, Southeast Asia, South America, Europe, and other international markets. We provide RAYCHEM with more than 100,000 meters of super thick three-layer co-extruded heat-shrinkable composite tubing as well as about a million meters to ABB of low-pressure heat-shrinkable tubing. This shows the company's great capabilities in terms of quality assurance, customization and development, and ability to deliver in large quantities.
International Exhibitions and Market Expansion.
In recent years, we have actively expanded into overseas markets, participating in international industry exhibitions such as the Hannover Messe in Germany, the Dubai Power & Energy Exhibition in the Middle East, and the Mexico Power Exhibition.
We got to speak in great detail with many of our customers around the world and this led to product certification system, testing capabilities, and the manufacturing strength getting recognition of our overseas suppliers. We have discussed several cooperation proposals on testing samples, OEM collaboration, and placing mass orders that will strengthen our company' s brand image within the international cable accessories market.
FAQ:
1. Is double wall heat shrink suitable for automotive wiring harness applications?
Yes. Double wall heat shrink provides reliable insulation, waterproofing, and mechanical protection for automotive wiring harnesses, sensors, battery cables, and connectors.
2. What is the function of the hot melt adhesive layer after heating?
When heated, hot melt adhesive completely flows out, fills the joint gaps, and makes a strong bond with the substrate. In this way, it attains sealing, moisture protection, and cushioning protection.
