Key Features
Class 180°C insulation for nickel strip wrapping
Mr.Bond® Polyimide tape is used to wrap nickel strips in the battery pack; its silicone adhesive secures and shields the nickel strips during demanding tasks. This tape provides high thermal resistance (Class 180°C) and flexibility, making it perfect for insulating nickel strips in battery packs without increasing overall weight. The product is flame-retardant (FR) grade, with outstanding dielectric strength and effective thermal resistance.
Manufactured under an ISO 9001:2015-certified quality management system.
Mr.Bond® Polyimide Tape is a polyimide film tape with a silicone adhesive, used to wrap the nickel strips inside an EV battery pack. It carries a Class 180°C thermal rating and is supplied in flame-retardant (FR) grade with outstanding dielectric strength and effective thermal resistance. The film is thin and flexible, so it conforms around narrow strips and tight radii and insulates them without increasing the overall weight of the pack. The silicone adhesive secures and shields the nickel strips during demanding tasks, which is why battery pack assemblers and e-mobility manufacturers specify it for cell-to-cell interconnects and for general high-temperature electrical insulation. Mr.Bond® Polyimide Tape is manufactured by Lalit Jain Industries Pvt. Ltd. (LJIPL), an ISO 9001:2015 certified adhesive tape manufacturer founded in 1987, at its units in Rai, Sonipat (Haryana) and Bawana, Delhi NCR, India. Send your width, length and grade requirement for a quote.
Mr.Bond® Polyimide Tape is used to wrap the nickel strips that link cells inside a battery pack. The silicone adhesive holds the film tight against the strip so the conductor stays secured and shielded during demanding tasks, while the polyimide film acts as the dielectric barrier between that strip and anything it must not touch.
Polyimide film is picked for this job because it is thin, flexible and thermally stable. (The product is listed by some buyers as polymide tape; polyimide is the correct spelling of the film, and both spellings refer to the same tape.) It wraps narrow strips and tight radii without lifting, and it insulates without increasing the overall weight of the pack: a real consideration where every gram in an EV pack is accounted for.
The tape is an FR-grade product with outstanding dielectric strength and effective thermal resistance. Buyers usually order it alongside other pack-level materials from the same group; the wider portfolio, including tapes made for the EV battery industry, is listed at Lalit Jain Industries Pvt. Ltd. (LJIPL), the parent company behind the Mr.Bond®, PTK® and LKJ® brands.
A thermal class describes the temperature an electrical insulation material is rated to work at. Class 180°C is one of the higher classes in common use, and it is the class quoted for Mr.Bond® Polyimide Tape.
In practice it means the tape is specified for places that get hot and stay hot, not only for room-temperature wrapping. The same 180°C class (Class H) appears on our PTFE-coated fiberglass heat sealing tape, which is used on heat-sealing equipment and high-temperature electrical work.
When you enquire, state the operating temperature, the width and the roll length you need so the correct grade is quoted against your drawing. Where a lower-temperature or component-level film would do the job instead, our comparison of polyimide, PVC and polyester insulation tapes sets out which carrier belongs on which job.
Flame retardant, shortened to FR, means the material is formulated to resist ignition and to avoid feeding a flame. On an insulation tape that sits directly against live conductors inside a sealed enclosure, that behaviour matters as much as the dielectric strength does.
Mr.Bond® Polyimide Tape is supplied as an FR-grade product, so one tape covers both requirements: electrical isolation and flame-retardant behaviour. Where a flame rating has to be evidenced on other materials in the same assembly, the Mr.Bond® range also includes UL 94V0 approved thermal pads for use between cells and casing.
For the other materials that go into the same assembly, the EV battery tapes hub walks a pack job by job, from nickel-strip insulation through to shielding, bundling and sealing.
Polyimide tape has high performance, reliability and durability, and the reason is that it brings a unique combination of electrical, thermal, chemical and mechanical properties together in one thin film. Most tapes are good at one of those; polyimide is specified where a single layer has to be good at all four.
That combination is what allows it to withstand extreme temperature, vibration and other demanding environments: the conditions found inside a battery pack, an engine bay or a reflow process rather than in a workshop. Its published properties include heat resistance, high voltage insulation, acid and alkali resistance and low voltage electrolytic behaviour.
Mechanically it is a tape you can work with: it is residue free on removal, it suits sublimation printing, and it handles insulation of coil and wave soldering protection alongside general electrical insulation and high temperature resistance. For the lower-temperature, general-purpose wiring work that sits around it, see PVC insulation tape.
The classic use is masking. Polyimide tape is generally used to protect the golden finger when a PCB is in the soldering tin furnace: the gold-plated edge connector contacts that must come out of the process clean, unsoldered and unoxidised. A tape that softens, shrinks or leaves adhesive behind at solder temperature would create more rework than it saved.
Because the film takes that heat, the same tape is used for wave soldering protection more generally, and for insulation of coil work where a thin dielectric has to survive a hot winding. It comes off residue free, which is the other half of the requirement on a board that then goes to test.
Beyond the board, polyimide tape is used on the printed circuit board itself and in IC chip packing heat construction. Electronics assemblers sourcing the surrounding materials will find the shielding, Class H and coil-wrapping options on the electronics industry page.
Nickel strips carry current between cells and must be isolated from the casing and from neighbouring strips. Mr.Bond® Polyimide Tape wraps the strip and stays in place, with a silicone adhesive that secures and shields it during demanding tasks. The flexible film follows the strip profile instead of tenting over it.
Pack designers have a weight budget and insulation is one of the places it gets spent. Because the polyimide film is thin and light, it insulates nickel strips without increasing the overall weight of the pack, which is one of the main reasons it is specified in place of thicker sleeving.
Outside the battery pack, the same Class 180°C rating and outstanding dielectric strength make the tape useful wherever a thin insulating barrier has to survive heat. It is an FR-grade tape, so it can be used in assemblies where flame-retardant materials are called for.
Polyimide tape is generally used to protect the golden finger when a PCB is in the soldering tin furnace, and for wave soldering protection on the same boards. It is residue free on removal, so the gold contacts go to test clean. It is also used on the printed circuit board itself and in IC chip packing heat construction.
LED module and board bonding is a published application. The same tape also provides an efficient heat transfer path between heat-generating components and heat sinks, fans, heat spreaders and heat pipes, so one material covers both the bonding and the thermal path on an LED assembly.
Polyimide tape is used in automotive electronic thermal management, including engine control units, ABS systems and gear control units. These are assemblies that see extreme temperature and constant vibration, which is exactly the combination of electrical, thermal, chemical and mechanical properties the film is specified for.
It is used to wrap nickel strips in an EV battery pack. The silicone adhesive secures and shields the nickel strips during demanding tasks, and the polyimide film provides electrical insulation between the strip and surrounding parts. Its flexibility also makes it suitable for insulating other tight, high-temperature electrical assemblies where a thin dielectric barrier is needed.
Mr.Bond® Polyimide Tape carries a Class 180°C thermal rating. That is a high thermal class for an insulation tape and it is why the product is used in battery packs and other assemblies that run hot. State the actual working temperature of your application when you enquire so the correct grade is supplied.
Yes. The product is supplied in flame-retardant (FR) grade. Alongside the FR grade it offers outstanding dielectric strength and effective thermal resistance, which is the combination battery pack assemblers look for in a tape that sits against live nickel strips inside a closed enclosure.
No meaningful weight. One of the reasons polyimide film is chosen for nickel strip insulation is that it does the job without increasing the overall weight of the pack. The film is thin and flexible, so it wraps the strip closely rather than bulking it out the way thicker insulation would.
A silicone adhesive. Silicone is used because it holds on the film and on the strip while the assembly is being worked on, securing and shielding the nickel strips during demanding tasks. Combined with the Class 180°C polyimide backing, it gives a tape that stays put in a hot, tightly packed assembly.
Published applications are LED module and board bonding, the printed circuit board itself, and IC chip packing heat construction. It is also used to protect the golden finger when a PCB is in the soldering tin furnace, for wave soldering protection, for insulation of coil and for sublimation printing.
Yes. It is used to provide an efficient heat transfer path between heat-generating components and heat sinks, fans, heat spreaders and heat pipes. If the job is filling a measured gap between a cell and its casing rather than taping a component to a heat sink, a thermal pad is the better form, see the thermal interface materials page.
Yes. It is used in automotive electronic thermal management, including engine control units, ABS systems and gear control units. Those assemblies combine heat, vibration and electrical isolation requirements, which is why a film with electrical, thermal, chemical and mechanical properties in one layer is specified for them.
It offers acid and alkali resistance alongside heat resistance, high voltage insulation and low voltage electrolytic behaviour. That chemical resistance is part of the reason the tape survives soldering and plating processes, and it is removed residue free. Tell us the process chemistry and temperature in your enquiry so the correct grade is quoted.
It is manufactured by Lalit Jain Industries Pvt. Ltd. (LJIPL), founded in 1987 by Late Mr. Lalit Kumar Jain and now led by directors Mr. Prateek Jain and Mr. Shikhar Jain. The company is ISO 9001:2015 certified and produces from two units, at Rai, Sonipat in Haryana and Bawana in Delhi, India.
