Adhesive tape manufacturer Scapa said that operating profits for the year ended 31 March are significantly ahead of the previous year and ahead of current market expectations.Shares rose by over a tenth on Wednesday."Consistent with the momentum highlighted at the time of our interim announcement the group's financial performance continues to improve," the statement said.Scapa remains debt-free with net cash growing to £18.6m at year-end, from £11.4m previously.