Fibre business Invista has moved to acquire Ashburn Hill, owner of the Tecgen flame-resistant brands, for an undisclosed sum.

Invista, which already held a minority interest in the company, gains the Tecgen Select and Tecgen Extreme brands, plus a manufacturing operation in Texas.

Jon Heard, who left Invista in 2008 to become chief executive of Ashburn Hill, will continue to lead the business, with the Tecgen brands falling under Invista’s Performance Materials business unit.

“The Tecgen flame-resistant brands have quickly gained trust in the marketplace, and by coupling that expertise with Invista’s existing global workwear capabilities, we have high expectations for the specialised garment segment,” said Jeff Brown, executive vice president at Invista Performance Materials.