In recent years, the rapid development and popularity of smart phones have greatly facilitated the communication between people. Smart phones have more and more functions, with the screen size and processor capacity constantly increasing. The power consumption and capacity of mobile phone batteries are also increasing. Accordingly, the safety of mobile phone batteries has gradually attracted people's attention. It is particularly important to provide a fireproof and flame-retardant polyimide PI film material for lithium batteries.

      Through unremitting efforts in half a year, Cheermo launched a truly fireproof and flame-retardant PI serious stickers.  Let’s have a close look at its specific features.

The PI film used complies with the UL 94 VTM-0 flame retardant certification requirements. Moreover, the high-adhesion and flame-retardant adhesive is used for fire prevention and flame retardant.

Basic product features

Ultra-high heat resistance, instant heat resistance to 280℃

 Insulation impedance of 40MΩ or more within any 40mm

The PI film has super-high resistance to puncture and voltage, so it is widely applied in lithium battery or lug wrapping of mobile phones.

Illustration on the application of Cheermo’s products in mobile phone parts and auxiliary die cutting materials