Toray's new PBT reduces dielectric loss without compromising dimensional stability and plasticity

Toray Industries of Japan has developed a high-performance PBT with 40% lower dielectric loss than conventional PBT in the high-frequency millimeter waveband without compromising dimensional stability or moldability
.
Toray said the material will significantly improve the performance of high-speed transmission connectors, communication modules, millimeter-wave radars and other equipment for 5G base stations and autonomous driving systems
.
The material's balance of dimensional stability, strength, and other performance characteristics, as well as its processability, has a wide range of applications in the production of automotive, electrical, and electronic parts
.

Toray noted that the growing need to reduce the dielectric loss of high-frequency components in automatic drive systems and other applications is driving the use of polymer alloys and fillers
.
However, these resins also suffer from degraded heat resistance and mechanical properties, which compromise their potential to reduce dielectric loss
.

Toray says its PBT has a loss tangent of 0.
006 in the ultra-wide 79-GHz millimeter-wave band
.
The loss caused by this factor is about 40% lower than that of conventional PBT resins, while retaining its essential properties
.
This is achieved by constraining the molecular motion of polymers in the high frequency range through polymerization techniques
.

In the 5G communication frequency band, from below 6GHz to the high frequency millimeter wave frequency band, the dielectric loss is very low, and the dielectric stability is also guaranteed in high temperature and humid environments
.
Toray said the new PBT reduces transmission loss and enables wide-area sensing, which can be a problem when designing high-frequency components
.

Toray said it has been a challenge to shrink the product size without changing the circuit and connector resistance
.
The low dielectric loss of the new resin makes it possible to keep resistance constant, which should help shrink products, reduce weight and improve performance
.