Teijin develops ‘world first’ PC-resin pillar-less windscreens

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Tommykaira ZZ with Polycarbonate-resin pillar-less windscreen

Teijin Ltd has developed what it describes as “the world’s first polycarbonate (PC)-resin pillar-less automotive front window” which will be used in the Tommykaira ZZ, a sporty electric vehicle (EV) produced by Kyoto University’s EV manufacturer GLM Co.

The Japanese reinforcement manufacturer announced 19 June that the its PC resins are the first to meet Japanese standards for use in cars’ windscreens, due to its high resistance to abrasion and weather.

GLM expects to acquire “street-ready certification” for the Tommykaira ZZ which offers the window as an option by autumn 2017.

Teijin also announced that it would market the product to car makers in the US and the EU.

Teijin is working towards becoming a key supplier to the automotive industry in medium term, leveraging its lightweight, strong, high-performance materials and integrated composite technologies to achieve the position. 

For this product, Teijin has thickened the perimeter of its PC-resin window and as a result eliminating the need for the A-pillar, or vertical support that divides the windshield and front window. 

The integrated pillar-less window, claims Teijin, is 36% lighter in weight than a conventional front window with an A-pillar.

Teijin already provides PC-resin solutions for plastic glazing, including for train windows, automotive panoramic roofs and quarter windows.

GLM has been mass-producing the Tommykaira ZZ since October 2015 and unveiled the model fitted with Teijin’s PC-resin window at Automotive Engineering Exposition 2017 Nagoya late June.

Japan’s new automotive safety standards will require plastics-glazed windows in models released from July to offer enhanced resistance to abrasion and weather.


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