Patent ID: 11905070
Assignee: ILLINOIS TOOL WORKS INC.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C  D  Y | IPC B  C  D

Claim 20:
21. A method of making a repulpable zipper for a re-closeable flexible package, comprising the steps of:
forming at least two first interlocking elements adapted for connection to a first wall of a flexible package using a repulpable material; and
forming at least two opposing second interlocking elements adapted for connection to a second opposing wall of the flexible package using the repulpable material;
the repulpable zipper being movable between a first open position that disengages the at least two first interlocking elements from the at least two opposing second interlocking elements and a second closed position that engages the at least two first interlocking elements to the at least two opposing second interlocking elements;
the repulpable material comprising 10 to 90% by weight of a water-soluble polymer blended with 10 to 90% by weight of fibers of a plant-based cellulose material.