Toray develops recycled PBT resin grade

1 min read

Yazaki Corporation and Toray Industries have developed a recycled polybutylene terephthalate (PBT) resin grade that uses scrap materials from manufacturing processes to make connectors for automotive wire harnesses.

Automotive Wire Harness Connectors
Automotive Wire Harness Connectors - (Image credit: Toray)

According to Toray, this resin can lower connector production-derived carbon dioxide emissions while offering the same performance properties as virgin materials.

Toray offers Ecouse Toraycon, a chemically recycled PBT resin made by depolymerising and repolymerising scrap from manufacturing processes. The downsides of recycling resins include contamination from foreign substances and degraded material quality. Through chemical recycling, the company provides recycled PBT resin that matches the quality of virgin material. This process includes quality control from depolymerisation to compounding.

One challenge for Yazaki has been to stabilise the quality of recycled materials in functional parts, such as automotive wire harness connectors. It addressed this by optimising the material properties and moldability of Toray’s chemically recycled PBT resin. It collaborated with Toray to develop a recycled PBT resin grade for connectors that matches the quality stability of existing PBT resin grades.

Through this joint effort, Yazaki and Toray will contribute to realising a carbon-neutral, circular economy in the automotive industry.