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Toray's new polymer with high rigidity and durability

27 Jan '21

2 min read

Pic: Toray

Toray Industries has developed a new polymer that retains the outstanding thermal resistance, rigidity, and strength of polyamide 6 (PA6) while offering a bending fatigue limit that is 15-fold that of conventional polymers. Prospective application areas for the new polymer with exceptional durability include automobiles, appliances, and sporting goods.

Toray plans to initiate full-fledged sample work in fiscal year 2021 while cultivating applications in diverse industrial materials fields.

PA6 is an engineering plastic whose diverse uses include automobile engine compartments and appliance housings. PA6 resin incorporates a flexible elastomer to resist fatigue and optimise the lifespan. The tradeoff, however, is that this lowers PA6’s thermal resistance, rigidity, and strength. The challenge for many years has thus been to develop a new material that offers all of these desirable properties.

Toray focused on polyrotaxane, which has a sliding molecular bond, as a polymer whose structure moves in response to external forces. The company endeavoured to balance the inherent attributes of PA6 and fatigue resistance by finely dispersing polyrotaxane in the resin.

Toray drew on proprietary Nanoalloy microstructure control technology to maximise the effectiveness of polyrotaxane by dispersing it in the 10 nanometre crystals of PA6. The resulting flexible stress-dispersion mechanism led to creation of the new polymer. Tests at the SPring-8 synchrotron radiation facility in Japan confirmed that the new polymer suppresses changes in the crystal structure of PA6 when subjected to external forces.

Fibre2Fashion News Desk (SV)