The Mitsubishi Chemical Group (MCG Group) has developed the ZR Series of NOVADURAN™ polybutylene terephthalate (PBT) resin, a foaming grade with ultra-low specific gravity. The company began sample work in January 2024.

Mainly, the ZR Series is a new grade and was developed by combining the MCG Group’s formulation and proprietary manufacturing technologies. It has foaming properties while at the same time a highly rigid fiber-reinforced engineering plastic. These features make the ZR Series unique in itself.

There is wide recognition of foam injection molding as a technology for reducing the weight of components. However, foaming using chemical foaming agents has problems with decomposition residues and workability. Moreover, physical foaming with supercritical fluids has limitations, such as the need for special molding equipment. Specifically, the ZR Series is a ground-breaking grade that solves these issues. It enables the production of molded products with ultra-low specific gravity below 1.0 without the need for complicated work or special molding machines.

Also, the ZR Series delivers the high chemical resistance and heat resistance of PBT resin. It perfectly applies to the automotive field. Recently, there has been a strong demand for reduced weight to achieve better fuel efficiency, lower CO₂ emissions, and better driving performance. Additionally, it suits a wide range of other fields including industrial materials, electricity and electronics.

The MCG Group commits to further enhancing the functionality of NOVADURAN™. It will develop technologies for compound products to offer high-value-added performance products and contribute to the realization of sustainable societies.