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Envalior is introducing Durethan FLX-RTM, a new impact-modified PA6 material that delivers excellent low‑temperature mechanical performance and is specifically engineered for rotational molding of tank liners, delivering excellent melt flow for complex geometries and exceptional mechanical performance.
New easy flowing, impact‑modified PA6 designed for rotational molding of tank liners offers superior low‑temperature mechanical performance.
Envalior and Elkamet offer manufacturers integrated design, processing, and manufacturing support by leveraging extensive experience in plastic liners for high‑pressure tanks of varying sizes and configurations.
The application showcased at the Envalior booth P39, Hall 5, during JEC World 2026, highlights the design and processing advantages of Durethan® FLX-RTM for rotationally molded tank liners.
Envalior is introducing Durethan® FLX-RTM, a new impact-modified PA6 material that delivers excellent low‑temperature mechanical performance and is specifically engineered for rotational molding of tank liners, delivering excellent melt flow for complex geometries and exceptional mechanical performance. With rotational-molding specialist Elkamet, Dautphetal, Germany, the material has already been successfully processed into prototype tank liners.
Rotational molding without pinch-off and weld seams
By complimenting Envalior’s established materials for various liner‑production processes, Durethan® FLX‑RTM addresses the growing importance of rotational molding in tank manufacturing. Rotational molding offers a highly economical single‑stage process that produces homogeneous components—eliminating pinch‑off seams typical of extrusion blow‑molded liners and weld seams required in multi-part injection‑molded designs.
Our heat‑stabilized compound offers high melt flowability for rotational molding, enabling precise formation of filigree screw‑thread areas or the integration of metal or aluminum boss parts. It also retains the strengths that characterize our Durethan® PA6 compounds for injection molding and extrusion blow molding,” explains Keestra.
Engineered for demanding hydrogen applications
Durethan® FLX‑RTM is a heat‑stabilized, impact‑modified, easy‑flow PA6 compound based on low‑molecular‑weight polyamide 6 with excellent flow properties. It maintains strong mechanical performance thanks to best‑in‑class impact‑modification systems and heat‑stabilization packages.
Key performance attributes include:
-Low hydrogen permeability, providing a high barrier against small gas molecules
-Compatibility with liquid fuels, including CE10 gasoline and other apolar liquids
-Exceptional toughness at temperatures down to –40 °C
High elongation and ductility
Combined, these properties support safe, durable liner solutions across a range of storage media and environmental conditions.
From material development to prototypes
Together with Elkamet, a leading specialist in technical plastics with decades of experience in rotational molding, blow molding, and extrusion, Envalior has produced several prototype parts using electrically heated molds, vacuum assistance, and nitrogen purging to translate the material’s intrinsic properties into outstanding part performance.
Elkamet brings decades of experience in taking prototypes to series production and has deep expertise in hydrogen‑storage vessel manufacturing. The company supports customers in improving part design and optimizing mold construction for fast and efficient production.
Integrated customer support across the entire development process
Envalior and Elkamet support manufacturers with a comprehensive range of services throughout all stages of component development. This includes design, processing, and manufacturing expertise built over many years in plastic liners for high‑pressure tanks of various sizes, designs, and media.
A distinct advantage is Envalior’s comprehensive hydrogen‑permeation data, which few material suppliers provide.
“With this data, customers can understand how permeation depends on pressure, temperature, and wall thickness, and optimize their liner design accordingly,” says Keestra.
Envalior also provides detailed material data on mechanical behavior and processing properties and offers on‑site support for process optimization and series‑production startup.
About Envalior
Envalior is a global leader in Engineering Materials with over 4,000 employees worldwide. It was established in 2023 through the merger of Lanxess Performance Materials and DSM Engineering Materials. With a long track record of customer-driven innovation, Envalior specializes in developing Sustainable and High-Performance Engineering Materials, including PA6, PA66, PBT, PA46, PPS, TPC (TPE-E), PET, PA4T, PA410, and Thermoplastic Composites. Focus markets include Mobility, Electronics & Electrical, and Consumer Goods.
About Elkamet
Elkamet is a leading specialist in technical plastics with decades of experience in rotational molding, blow molding, and extrusion. Founded in 1955 in Germany, the company develops and manufactures high‑quality tanks, liners, profiles, and lighting components for demanding industries. With around 1,140 employees at six locations worldwide and long‑standing expertise in producing liners through both rotational molding and blow molding, Elkamet delivers reliable, customer‑focused solutions supported by strong material and process know‑how.
Note: This story has not been edited by The Polymerupdate Editorial team and is auto-generated from a syndicated feed.
