WEB EXCLUSIVE: Kraiburg TPE Corp., Duluth, Ga., has come out with two new families of styrenic TPEs for overmolding onto rigid engineering thermoplastics for consumer electronics applications. They are said to have excellent haptic (touch) qualities and resistance to hand sweat, skin oils, alcohol cleaners, detergents, UV, and ozone. Both are based on hydrogenated styrenic block copolymers (HSBCs) and are said to overcome the limitations of conventional SBCs with regard to mechanical properties and adhesion to thermoplastic substrates. Both remain flexible down to -40 C/F.
One new family is called COPEC, distinguished by its silky or velvety feel. It’s aimed at computer mice, game consoles, and ear plugs. Its finish is said to be dirt repellent and anti-slip on smooth surfaces without a sticky feel. These TPEs adhere well to ABS, PC, and PC/PBT. Hardness range is 60 to 80 Shore A.
Also new is the For-Tec E series (60 Shore A), designed for excellent adhesion to nylon 66 and semi-aromatic polyamides. It’s aimed at seals or plug-in connections for cellphones and MP3 players, as well as power tools.