Tepex dynalite continuous fiber reinforced thermoplastic composites have excellent flame retardant properties even without the addition of flame retardants due to their special semi-finished structure. This is the result of a comprehensive investigation and testing of typical Tepex dynalite applications and installations. "The tests also show that our composite materials are very suitable for structural and housing components of high-voltage batteries for electric vehicles. For safety reasons, these components need to have excellent flame retardancy," said the R & D supervisor. "The material used here is aluminum Lightweight alternatives. They provide cost-effective component solutions thanks to cost-effective functional integration and simple processing in the hybrid molding method, without the need for rework later on. "
The flammability tests conducted included the testing of the combustion characteristics of automotive interior materials by the US FMVSS302 (Federal Motor Vehicle Safety Standard). This test studies the burning rate. The non-flame retardant Tepex dynalite variant has performed well in tests. They did ignite, but the flames barely spread during the specified test time.
According to the provisions of Article 6.2.4 of the UN Regulation No. 180, the non-flame-retardant Tepex dynalite variant was also tested in the fire tray test. The test sample was laid flat on a barrel of burning fuel, exposed directly to the fire for 70 seconds, and then not directly exposed to the fire for 60 seconds. The test is a true reflection of the fire conditions Tepex may face in typical applications, such as underbody panel assemblies. Relevant person in charge: "There are no holes in the composite material, and the fiber will not burn in both tests. The plastic will not drip and burn, and the test sample will extinguish itself. The reason for these flame retardant properties is the content of flame-resistant continuous fibers High, while the proportion of flammable plastics is relatively low. "
The investigation also showed that UL 94 testing did not provide any reliable results for Tepex's actual fire behavior. The reason is that the vertically fixed test specimen is exposed to the flame from the edge. "This method does not match the typical Tepex dynalite installation situation." "Our composite materials are usually overmolded and reverse-injected, which prevents flames from reaching the fiber end." For applications where V-0 classification is required , Adhesive laminates offer halogen-free flame retardant Tepex based on polyamide, polycarbonate and polyphenylene sulfide. For example, for test samples with thicknesses between 0.4 mm and 2.2 mm, the polycarbonate product type is listed as V-0 on the UL Yellow Card.
Due to the main potential application of Tepex dynalite in the powertrain of electric vehicles, Bond laminates have used their own test equipment to conduct a comprehensive study of the combustion performance of overmolded polyamide-6-based Tepex. "HiAnt vector" was used. This is a U-shaped profile made of Tepex, the interior of which is reinforced by transverse stiffeners made of different types of polyamide 6 (such as Durethan). This actual test sample was exposed to 6 positions in a flame at 900 ° C for 30 seconds to 5 minutes.
Non-flame-resistant Tepex dynalite has again confirmed its inherent excellent flame retardancy in this test. This is because the molded ribs only burn after 5 minutes of flame treatment, and only when they are not equipped with a special flame retardant. In contrast, if the rib arches and overmolded areas made of flame-resistant polyamide pass the test, the flames do not spread from the flame-treated location, but extinguish when the burner is removed. "Therefore, the use of non-flame-resistant Tepex dynalite and flame-resistant injection-molded materials provides a considerable safety margin for the design of flame-retardant components. We see this material combined in high-voltage battery components such as housings and separators as well as inductive There is great potential for battery charging systems on the floor. "