MATERIALS | ENGINEERING THERMOPLASTICS
as the base resin in carbon fibre-reinforced thermoplastic composites used in structural and body components, and for applications in the industrial, aerospace and marine markets. Noryl GTX 9500 resin offers significantly lower
water and moisture uptake than PA 6 and 66, even under high heat conditions, up to 150°C. SABIC testing demonstrated that Noryl GTX 9500 resin absorbed 21% less moisture at equilibrium than PA 66, and 58% less than PA 6. It had a total dimen- sional change (flow direction and crossflow direction) at equilibrium of 0.29%; the total change for PA 66 was 84% higher, while for PA 6 it was 165% higher. Noryl GTX 9500 resin also demon- strates higher retention of mechanical properties (flexural modulus, tensile modulus and flexural strength) under wet conditions.
Domo database Polyamides specialist Domo’s Engineering Materials BU, which supplies the Technyl and Domamid lines, says 12% of its sales now consist of (principally post-industrial) recycled materials, marketed as Technyl 4earth and Econamid. Domo also says it is using its considerable materials know-how to help customers be more efficient in their use of polyamides. It has a material database covering more than 50 grades of PA 6 and PA 66. The database, which Domo describes as the
Below: The DuPont stand at Fakuma 2021, once again an
in-person event after the “virtual” Fakuma 2020
premier advanced mechanical modelling data resource, is integrated in its MMI Technyl Design predictive platform. This is a multiscale modelling, mechanical calculation, and injection moulding simulation technology built around Digimat (which was developed by e-Xstream engineering). The technology enables accurate analysis of the behav- iour of Domo’s glass-reinforced polyamide materials. There are over 42,000 files in the MMI reposi-
tory. These material cards cover not only static load and failure, but also tests on a wide scope of dynamic parameters. These include impact, crash, vibration, modal frequency analysis, NVH, damp- ing, fatigue, thermal dilation and warpage, and effects of moisture and glycols. The files can be used by Domo customers who have access to Digimat MX, and Domo can also perform simula- tion support in-house on their behalf. Materials and properties are measured under a
wide range of conditions, including different strain rates, temperatures and humidity levels. An in-house methodology for identifying polyamide matrix parameters is employed based on various glass fibre measurements, including orientation and fibre length distribution. Machine learning improves the efficiency of the various models. Domo says it also provides up to 15% greater accuracy than standard reverse engineering. “OEMs and tier parts suppliers looking for metal
replacement solutions can rely on MMI Technyl Design’s advanced predictive simulation tool to ensure optimal design integrity before moving to production,” says Domo. It cites one case study, in which diecast aluminium could be replaced with Technyl MAX for an automotive motor mount application, resulting in a 40% weight reduction of the final part with tensile strength values similar to the die cast version, and up to 100 times better acoustic damping. Meanwhile, Ascend Performance Materials, the world’s largest fully integrated producer of PA 66, earlier this year acquired French compounder Eurostar Engineering Plastics, which has a broad portfolio of flame-retardant engineered plastics. “Eurostar’s experience in compounded polyamides fits well within our own portfolio and manufacturing capabilities,” says John Saunders, Ascend’s Vice President for Europe. “Their Starflam materials are enabling the transitions to clean energy and transportation, and smarter devices.” Last year, Ascend acquired the Italian firms
Poliblend and Esseti Plast, as well as a compound- ing facility in China. At the Fakuma trade show in Germany in
October, DuPont highlighted inroads it has made in developments for automotive electrification, another important route to carbon footprint reduction. Company experts say many of those have been focused on supporting EV battery and thermal management optimisation, e-motor and power electronic efficiencies, safety, lightweighting, and durability, and connectivity and infrastructure. “Polymer-based solutions that exhibit excellent mechanical properties and can resist heat, chemi-
18 INJECTION WORLD | November/December 2021
www.injectionworld.com
IMAGE: DUPONT
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52
