UNDER THE HOOD | AUTOMOTIVE
tronics, and automotive products.” Jason Zhang, Vice President, Performance
Polymers, and General Manager, China for DSM Engineering Materials, says: “Our new production line in Jiangyin is a key milestone for DSM, under- lining our commitment to supporting our custom- ers, enabling sustainable living, and seizing growth opportunities in China. Together with our custom- ers, we are ready to take the next important steps in our sustainability journey, drive the shift to a low-carbon, circular economy, and create brighter lives for all.” Polyamide producer DuPont has agreed with
Celanese to divest a substantial portion of its Mobility & Materials segment – predominantly those in the engineering polymers and perfor- mance resins lines of business – as well as its stake in the DuPont Teijin Films joint venture. The product lines DuPont is to divest include Zytel, Delrin, Hytrel, Crastin, Vamac and Tedlar. Combined, these businesses represent approximately $4.2bn in revenue and about $1.0bn of operating EBITDA based on full year 2021 estimates. The sale of DuPont’s Mobility & Materials
portfolio is expected to close in Q4 2022, and will see Celanese take control of a global production network of 29 sites, including compounding and polymerisation facilities, along with other assets and 5,000 highly-skilled employees. “The acquisition of the M&M business is an
important strategic step forward and establishes Celanese as the pre-eminent global specialty materials company,” said Lori Ryerkerk, Celanese Chairman and CEO. SABIC has introduced Noryl GTX 9500 resin, a new addition to its range of unfilled Noryl GTX resin grades which, it claims, delivers excellent dimensional stability under hot and humid condi- tions, addressing the challenge for highly demand- ing automotive applications. Noryl GTX blends PA with modified polyphenylene ether polymer (PPE). The company says the new resin retains a better balance of mechanical properties when exposed to the heat and humidity typical of automotive under-hood environments, than PA66 or PA6, as well as comparable high flow and high-tempera- ture performance. Its dimensional stability and mechanical property retention under a wider range of temperatures and humidity – together with high flow performance – can create opportunities for thin-wall designs that reduce weight. Target applications for Noryl GTX 9500 resins include vehicle junction boxes, connectors and other applications requiring dimensional stability. “Our global development teams excel in
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formulating thermoplastics with targeted proper- ties that resolve longstanding customer challenges such as the propensity of nylon to soften under exposure to moisture,” says Darpan Parikh, Global Product Management Leader, Resins and Com- pounds, in SABIC’s specialties business. “We designed Noryl GTX 9500 resin to give our customers innovative new material options for applications that must retain their shape and performance in hot, humid environments. The launch of this new grade demonstrates our leadership in materials innovation and our focus on continuously improving and expanding our portfolio,” said Shinsuke Nakamoto, Senior Busi- ness Manager, Noryl portfolio, Asia Pacific, SABIC’s specialties business. The strong tendency of PA resins to absorb
moisture and water, exacerbated at elevated temperatures, may cause softening, loss of stiffness and warpage. SABIC says Noryl GTX 9500 resin offers significantly lower water and moisture uptake than conventional PA, even under high heat conditions, up to 150°C. In fact, Sabic testing demonstrated that Noryl GTX 9500 resin absorbed 21% less moisture at equilibrium than PA66, and 58% less than PA6. In the company’s tests, with moisture absorption
at equilibrium, Sabic’s Noryl GTX 9500 material surpassed conventional PA in dimensional stability. Noryl GTX 9500 resin had a total dimensional change (flow direction and crossflow direction) at equilibrium of 0.29%, while PA66 has a total change of 84% and PA6 had a total change of 165% higher than Noryl GTX 9500 resin. This improved dimen- sional stability offers benefits for moisture-sensitive applications, including reducing warpage to minimise scrap rates and enabling designs with thinner walls to support lightweighting. The company says that Noryl GTX 9500 also demonstrates exceptional retention of mechanical properties – flexural modulus, tensile modulus and
Below: Noryl GTX 9500 from SABIC has
been designed specifically for hot and humid under the hood applications
May 2022 | INJECTION WORLD 53
IMAGE: SABIC
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