Johns Manville Introduces High-Performance Fibers for PA66

Johns Manville (JM), a market-leading manufacturer of glass fiber products and a Berkshire Hathaway company, announced today at the annual JEC Composites Show the introduction of a new chopped strand glass fiber for high-performance polyamide (PA66) designed for automotive applications requiring combined hydrolysis performance and reduced weight.

“Lightweight and long-term performance are important drivers for automotive engineers who are designing cost-effective solutions for next generation automotive components with engineered thermoplastic polymers,” said Brian Sapp, Global Fibers Business Director for JM Engineered Products.

Johns Manville’s new ThermoFlow® 675 provides improved mechanical properties in tensile strength after 1,000 hours aging test by 10 percent and improved impact performance by 15 percent versus standard short-glass fiber chopped strands. ThermoFlow® 675 maintains the exceptional high flow feeding performance of current ThermoFlow® chopped strands with low fuzz and less downtime to the benefit of customers using large extruders, even with high glass load.

“Our commitment to continuously innovate and replace metal with short- and long-glass fibers engineered thermoplastics will support our global customers who are seeking new solutions and materials to support their growth,” Sapp said.

About Johns Manville
Johns Manville, a Berkshire Hathaway company (NYSE: BRK.A, BRK.B), is a leading manufacturer and marketer of premium-quality products for building insulation, mechanical insulation, commercial roofing, and roof insulation, as well as fibers and nonwovens for commercial, industrial and residential applications. JM serves markets that include aerospace, automotive and transportation, air handling, appliance, HVAC, pipe and equipment, filtration, waterproofing, building, flooring, interiors and wind energy. In business since 1858, the Denver-based company has annual sales of approximately $2.6 billion and holds leadership positions in all of the key markets that it serves.  JM employs approximately 7,000 people and operates 44 manufacturing facilities in North America, Europe and China.  Additional information can be found at