Splaying
One common surface defect for injection-molded parts is known as splay, which is often described as splashes or fine lines that vary in color from the bulk of the molded part. Splay is particularly a problem for molded parts with large, thin sections, such as, for example, plastic cases for the back-up batteries used in cell phone relay towers. The undesirable appearance of splay can lead to increased scrap rates and reduced productivity.
(Culligan, US Patent 7,790,791, 9/7/2010)
Recent US Patents
9/7/2010
7,790,791
Injection molded article and method for the manufacture thereof
Culligan of Sabic found that splay often found during injection molding PPE materials can be avoided by adding small amounts of (0.1 to 1 wt%) aryl phosphate.