In free parison blow molding the development of parison shape appears to be the most critical step in proper polymer design. At least three parison shape factors can be related to final bottle properties: wall thickness swell which controls bottle weight; parison diameter swell which controls the amount of flash or trim; parison sagging which leads to nonuniform wall thickness. These parison shape factors must be related to basic rheological measurements that can be done on small samples. This paper presents data from extensional rheometry measurements on small specimens which correlate with these three basic parison parameters.
|Original language||English (US)|
|Pages (from-to)||84, 86|
|State||Published - Jan 1 1981|