the folienblocken prevent particles with improved dispergierbarkeit in polyolefinfilmen, their method of manufacture and use

摘要

A dispersible, porous particulate anti-block for polyolefin films is prepared by combining porous inorganic oxide, e.g., silica, with a surface active agent, e.g., a polar fatty acid ester, to form a particulate comprising both components. The particulate can be added as an anti-block agent to the polymer used to make the polyolefin film. The particulate has an average particle size in the range of about 1 to 20 microns and a carbon content in the range of about 1 to about 15% by weight of the inorganic oxide and ester. It has been unexpectedly discovered that a particulate prepared in this fashion is more readily dispersed compared to adding anti-block and conventional ester dispersants separately.