What are the requirements for high-temperature adhesive tapes used in new energy industries?

High-temperature adhesive tapes widely used in new energy industries generally have the following requirements:

Temperature resistance

High-temperature stability: Many application scenarios in the new energy industry will face high temperatures, such as the automobile engine compartment, the drying process in the production of lithium batteries, and the hot-pressing bonding of photovoltaic modules. It is required that the high-temperature adhesive tape can maintain stable performance in these high-temperature environments without deformation, melting and embrittlement, so as to ensure that its functions of bonding, fixing or insulating components are not affected. For example, the photovoltaic high-temperature positioning tape needs to provide a good fixing effect for photovoltaic cells and prevent the displacement of the cells when the hot pressing temperature is as high as 210℃.

Wide temperature range: different new energy application parts or production processes have different temperature conditions. Therefore, the high-temperature adhesive tape needs to have a wide temperature range to meet the diverse use needs. Generally speaking, the high-temperature adhesive tape used in new energy industry should be able to maintain reliable performance in the temperature range of-40℃ to 200℃ or even higher, which can not only adapt to the use in cold environment, but also withstand the test of high-temperature environment.

Bonding performance

High viscosity: High-temperature adhesive tape needs excellent viscosity and can firmly bond various materials, such as metal, plastic, glass, etc., so as to ensure that the bonded parts will not be loose, displaced or fall off during the long-term operation or production of new energy equipment. For example, in the bonding between batteries of new energy vehicles, EPT tape of Crown New Materials has strong adhesiveness, which can realize the firm bonding between batteries and guarantee the safe operation of batteries.

Balance between initial tack and holding tack: Good initial tack enables the adhesive tape to quickly and firmly adhere to the surface of the object at the moment of pasting, while excellent holding tack ensures that the adhesive tape can still remain sticky after long-term use or high-temperature environment without degumming. For some new energy components that need to be assembled quickly, such as automatic assembly of batteries, tapes with high initial viscosity and no curing time, such as EPT tapes of Crown New Materials, can effectively improve the assembly efficiency and stability.

insulating property

Electrical insulation: It is very important to prevent current leakage and short circuit in the electrical system of new energy vehicles, lithium batteries and photovoltaic power stations. When high-temperature adhesive tape is used as insulation material, it must have good electrical insulation performance, which can effectively isolate circuits under high voltage and high current environment and ensure the safety of equipment and personnel. For example, pack high-temperature adhesive tape for lithium battery is used for edge sealing, bottom insulation protection and binding fixation of steel and aluminum cases of lithium battery, which requires reliable electrical insulation performance to prevent short circuit inside the battery.

Corona resistance: In some high-voltage electrical equipment, such as driving motors and charging piles of new energy vehicles, high-temperature adhesive tapes also need corona resistance. Corona discharge will produce local high temperature and strong electric field, which will easily lead to aging and damage of insulation materials. However, high-temperature adhesive tape with good corona resistance can work stably in this harsh environment for a long time and maintain good insulation effect.

chemical stability

Corrosion resistance of electrolyte: Lithium battery contains electrolyte. When the high-temperature adhesive tape comes into contact with electrolyte, it must have good corrosion resistance, no chemical reaction and no corrosion by electrolyte to ensure the performance and safety of the battery. For example, the single-sided hot-melt lithium battery tape can resist the corrosion of lithium battery electrolyte and does not react with electrolyte, thus ensuring the stability of lithium battery performance.

Chemical solvent resistance: in the production process of new energy equipment, various chemical solvents are often used for cleaning and degreasing. High-temperature adhesive tape needs to be able to withstand the corrosion of these chemical solvents, without dissolution, expansion, discoloration and other phenomena, so as to ensure its performance is not affected.

mechanical character

High strength and toughness: new energy equipment may be subjected to mechanical forces such as vibration and impact during operation, and high temperature adhesive tape needs to have sufficient strength and toughness to withstand these external forces without breaking and tearing. For example, fiber adhesive tape has high tensile strength and deformation resistance, which can be used for binding protection of small power batteries, and can resist the influence of external mechanical forces while ensuring the battery to be fixed.

Flexibility and elasticity: For some new energy components with complex shapes or curved surfaces, such as the curved parts of automobile body and the edges of photovoltaic modules, the high-temperature adhesive tape needs to have good flexibility and elasticity, and can closely adhere to the surface of the components to achieve seamless bonding, avoid bubbles, wrinkles and other defects, and ensure good sealing and fixing effects.

Safety and environmental protection performance

Flame retardancy: The safety of new energy equipment is very important. The high-temperature adhesive tape should have certain flame retardancy, which can slow down the burning speed when encountering open flame or high temperature, reduce the fire risk, and gain time for personnel evacuation and equipment protection. For example, the high-temperature adhesive tape used in the bonding of automobile interior parts can effectively prevent the fire from spreading in the car and improve the overall safety of the car.

Low volatile organic compounds: In order to reduce environmental pollution and harm to human health, high temperature adhesive tape should minimize the release of volatile organic compounds (VOCs). In the enclosed space of new energy vehicles and in the production workshop and other environments, the high-temperature adhesive tape with low VOCs emission can provide a cleaner and healthier use and working environment.

Other requirements

Dimensional stability: High-temperature adhesive tape should maintain good dimensional stability under different temperature conditions without obvious shrinkage or expansion, so as to ensure its accuracy and reliability in bonding, fixing or insulation applications. For example, in the production of photovoltaic modules, if the size of the high-temperature positioning tape is unstable, it may lead to the position deviation of the battery and affect the performance of photovoltaic modules.

Ease of operation: High-temperature adhesive tape should have good operability, such as easy cutting, bonding and die cutting, which can meet the needs of mass production and automatic assembly in new energy industry. For example, EPT tape of Crown New Material has the characteristics of excellent die cutting and simple operation process, which can be widely used in automobile exterior decoration, interior decoration bonding and new energy battery bonding to improve production efficiency and product quality.

Traceability: With the increasing demand for product quality and safety in the new energy industry, high-temperature adhesive tapes used in some key parts need to be traceable, and their production process, raw material information, quality inspection data, etc. can be traced through product identification, batch records, etc., so as to quickly and accurately find out the reasons and take measures when problems occur.