Developing a high-performance, flame-retardant material for battery connectors with component supplier SMK.


When a global cell phone supplier wanted products that are safer for consumers, they turned to SMK with a request: help us develop a battery connector that is flame retardant. SMK in turn looked to DuPont for a material that could stand up to the extreme conditions of the reflow soldering process.

260°C soldering temperatures

Our challenges included:

High temperature resistance

Most flame-retardant, high-temperature polyamides pose problems when exposed to high temperatures. Specifically, they create excessive out-gassing during the molding process and blister during reflow soldering causing poor appearance and potentially decreasing product reliability and performance.


To address environmental issues, SMK was also looking for non-halogenated and bio-based materials that would meet those parameters.


Our Japan sales team joined forces with the SMK design team in Japan to initiate the project and to do the material recommendation. Technical teams from SMK and DuPont China then collaborated to run the trial at the SMK facility in China. The onsite technical support from DuPont China’s technical team also optimized the processing for the cell phone battery connector.

CO2 emissions

The great team collaboration helped ensure the mass production of the component.

Our partnership with SMK delivered:

  • Cross regional collaboration

  • Process optimization


Our high-performance material, Zytel® HTN flame-retardant and non-halogenated grade, proved to be a superior material for overcoming out-gassing during the production of the battery connector and blistering during the reflow soldering process.

As a non-halogenated, flame-retardant material, Zytel® HTN FR NH is certain to become a solution for connector applications across the electrical industry as manufacturers seek to protect consumers and comply with safety and environmental regulations.

Key solution benefits included:

  • Low environmental impact

  • Increased productivity

  • Easy moldability

  • Lower outgassing

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