| 摘要 |
Granule surface contours include less than 10% concave locations, the remainder being convex, as determined by incident-light interference contrast spectroscopy. Independent claims are included for the following: (1) a method of manufacturing polymer granules comprising forcing a polymer melt through a nozzle into a cutting chamber flooded with coolant and dividing the polymer; (2) a method of manufacturing moldings, film or fibers; and (3) a method of quality control employing incident light interference contrast spectroscopy to measure and control concave inclusions in their surfaces. The interval between emerging from the nozzle and cutting to granules is less than 20 ms. The granules are cooled in liquid coolant to a temperature of 60-130degreesC at a rate of 2-30degreesC/s. Granule/coolant ratio is 0.03:1 to 0.12:1. Coolant is introduced into the chamber at a pressure of 1.1 bar. The quality control method, without consideration of granule surface curvature, determines ring-shaped reflections arising from concave locations, and the surface area they enclose. These areas are expressed as a ratio of the total observed surface area |
