METHOD OF MAKING PREFORMED ABSORBENT CORES AND ABSORBENT CORES PRODUCED THEREBY

摘要

A method of forming preformed absorbent cores wherein the absorbent cores have material properties which vary within the body of the core. The cores are formed by controlling the output of forming heads upon an air-laid non­woven apparatus. The forming heads or other particle distribution units distribute the fibers or particles upon the web such that alternating regions of material properties are created across the web. After each fiber disposition step, the web is optionally densified and the web is slit into several smaller web segments. The web is differentially densified and optionally differentially embossed such that the resulting web has a uniform thickness after being layered into a bundle. The uniform thickness of the web allows the finished non-woven web to be bundled for storage or transportation of the web without problems previously associated with layering webs having non-uniform material profiles.