Vydyne R220/R228 resins utilize a unique mineral reinforced nylon system developed to satisfy the market need for a high-rigidity thermoplastic as an alternative to certain metals. This mineral system provides two key features:
- isotropic behavior — property development in molded parts is usually independent of flow direction.
- a reduction in the tendency to develop sink marks in heavy cross sections such as molded-in bosses and ribs.
While not sink free, parts made from Vydyne R220/R228 can often permit boss and rib design or wall cross section changes that would not be tolerable in other unreinforced thermoplastic materials. Thus Vydyne R220/R228 resins offer more uniform molded part strength and performance as well as wider latitude in part design.
Vydyne R220/R228 resins are the workhorses for the full line of mineral reinforced nylon resins, providing the best overall balance of properties. Vydyne R220/R228 are heat stabilized and designed to provide increased ductility and reduced melt viscosity vs. unreinforced materials. This ductility improvement results in tougher, more impact-resistant molded parts. The reduction in melt viscosity enhances overall ease of injection molding, resulting in minor reductions in tensile strength, modulus, and heat distortion temperature. Parts from Vydyne R220/R228 have successfully withstood paint bake oven cycles without signifi cant loss of either dimensional stability or part properties.
