vor 3 Jahren

Issue 01/2015

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  • Bioplastics
  • Biobased
  • Plastics
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  • Renewable
  • Automotive
  • Environmental
  • Polymers

Automotive Fig. 4:

Automotive Fig. 4: Biodiesel fuel lines made of DuPont Zytel RS PA1010 nylon provide superior thermal heat aging performance and chemical resistance to biodiesel than petroleum based PA12 Fig. 5: Extruded fuel line tubing of Zytel RS PA610 offers improved flexibility, toughness and stress crack resistance, and a costeffective alternative to PA12. Enhanced performance Zytel RS renewably sourced nylon resins can provide enhanced performance and potential cost savings in replacement of PA11, PA12, PA612, and metal tubing for fluids. Sorona and Hytrel RS may provide cost savings versus PBT, PET polyesters, and thermoplastic elastomers (TPEs). Tests to determine the aging performance of a resin based on Zytel RS PA1010 after 1,000 hours aging in biodiesel B30 at 125 °C, clearly show better retention of elongation at break than petroleum based PA11 and PA12 in the same conditions (see Fig. 2). Zytel RS grades have been widely adopted for hot underhood applications because they maintain excellent long-term mechanical strength at high temperatures, and do not become brittle. Data from notched charpy air oven aging tests to determine impact strength retention at different temperatures showed that a resin based on Zytel RS PA610 maintained toughness after 2,000 hours at 110 °C, while PA12 lost impact strength and became brittle (see Fig. 3). Commercial applications DuPont has multiple commercial grades of renewably sourced engineering polymers that can be considered as replacements for petroleum-based plastics, depending on the automotive part required. Among the most in demand are extrusion applications in automotive fluid management. For example, Zytel RS PA1010 has been widely specified in diesel fuel lines in replacement of PA11 and PA12 because of its excellent retention of mechanical properties in hot biodiesel fuel. It also meets fuel-aging requirements for flex fuels in convoluted fuel lines. Mono and multi-layer vapor lines of Zytel RS PA610 can provide a cost-efficient alternative to PA12 and better adhesion to EVOH (ethylene vinyl alcohol copolymer) barrier layers. In another commercial example, an extruded fuel line tubing of Zytel RS PA610 uses new technology to improve flexibility, toughness and stress crack resistance while providing a cost-effective alternative to PA12. The tubing meets all North American specifications for monolayer vapor lines and multi-layer low permeable constructions, including resistance to zinc chloride and calcium chloride, burst pressure and -40 °C impact resistance, and multi-layer adhesion. It also provides a lower CO 2 footprint than PA12. Zytel RS PA1010 has been selected for air brake tubes, in replacement of PA12, because of its higher temperature and burst performance. The biopolymer can also offer superior chemical and ozone resistance in servo and vacuum brake tubes. Global resources DuPont has committed global resources to work closely with customers to help identify sustainable material solutions and provide technical support in PA11, PA12, PA612, PBT, PET, TPE, and metals substitution. Help understanding which DuPont renewably sourced materials can work in an application, and more technical information can be found on the website. 14 bioplastics MAGAZINE [01/15] Vol. 10

io CAR CALL FOR PAPERS NOW OPEN Biobased materials for automotive applications conference September 2015 Stuttgart, Germany » The amount of plastics in modern cars is constantly increasing. » Plastics and composites help achieving light-weighting targets. » Plastics offer enormous design opportunities. » Plastics are important for the touch-and-feel and the safety of cars. BUT: consumers, suppliers in the automotive industry and OEMs are more and more looking for biobased alternatives to petroleum based materials. That‘s why bioplastics MAGAZINE is organizing this new conference on biobased materials for the automotive industry.

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