Glass Fiber-Reinforced Polyamide Grilamid TRV
Warp-Free and Dimensionally Stable
Until now, low-warpage parts with first-class surface quality have only been available with unreinforced polyamides. Semicrystalline thermoplastics with glass fiber-reinforcement always had drawbacks in the surface quality (visible glass fibers), sink marks at ribs and a pronounced tendency to warp. Such materials would not really be useful for designer parts. For applications in vehicle interiors, the automotive industry requires high-strength materials with good surface quality.
The glass fiber-reinforced polyamide Grilamid TRV from Ems-Chemie AG, Domat/Ems, Switzerland, is based on Grilamid TR, an amorphous transparent polymer that is very well known in the market. The product allows warpage-free, extremely dimensionally stable parts to be produced without sink marks, and additionally offers high surface quality. Thanks to glass fiber reinforcement, the material also has high stiffness and strength. Even with high glass fiber content, the parts can be easily laser marked or pigmented.
The main applications of Grilamid TRV lie in automotive engineering and in the electrical and industrial fields, where, quite literally, every hundredth of a millimeter counts. The material is therefore predestined for housings and structural parts that are very complex and intricate.
One of the first automotive applications for this material was a car key. Developed by Ems-Grivory together with VTS GmbH Kunststoffe, Zimmern, Germany, and their customer, this application emphasizes the outstanding properties of Grilamid TRV. The specifications for the material included low warpage, combined with good bond strength for lamination and good weldability. It was also required to offer easy processing, good flow, low flash, and be readily pigmentable according to requirements. All these demands could be satisfied with Grilamid TRV. It was therefore the material of choice for these applications.
The Grilamid TRV product range has been steadily expanded in recent years. Products with different glass fiber content, as well as impact and flow-optimized grades are available today. One of the latest developments is Grilamid TRV products based on long-fiber technology from Ems Grivory. Thanks to this technology, mechanical properties such as stiffness or notch impact strength are further improved. Ems also offers a high-end solution for particularly challenging projects: Grilamid TRVX. Extremely low warpage and flash and even fewer sink marks: ideal properties for the toughest applications.
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