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US 12,246,936 B2Granted
Web-wound rolls with microsphere treated edge and methods of making same
Assignee3M Innovative Properties Company
InventorsYuko Yoshida, Yorinobu Takamatsu
Life of this patent
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Abstract
Web-wound rolls with a web edge treatment with microspheres and processes to make the same are provided. The web-wound rolls include a substrate web having at least two web edges. One or more stripes of coated material are disposed adjacent to one or both of the web edges. The substrate web is wound upon itself in multiple revolutions about a central core, and each revolution is held substantially separate from the next by the one or more stripes of coated material.
Claims13
An article comprising:
- a continuous web comprising a flexible polymeric substrate having a first major side and a second major side opposite to the first major side, and first and second web edges opposite to each other;
- one or more stripes of coated material having a thickness and disposed on one or both of the first and second major sides adjacent to the respective first and second web edges,
- wherein the continuous web is rolled upon itself in multiple revolutions about a central core to form a web-wound roll, and
- wherein each revolution of the web-wound roll is held substantially separate from the next at the respective web edges by the one or more stripes of coated material which comprises an adhesive blend including an adhesive and microspheres to provide a friction at the respective web edges and prevent a relative axial movement between adjacent revolutions, and the microspheres have an average diameter greater than a coating thickness of the adhesive such that at least some of the microspheres protrude beyond an exposed surface of the adhesive to contact the adjacent revolution.
1 more element
A method comprising:
- providing a continuous web comprising a flexible polymeric substrate having a first major side and a second major side opposite to the first major side, and first and second web edges opposite to each other;
- disposing one or more stripes of coated material having a thickness on one or both of the first and second major sides adjacent to the respective first and second web edges;
- and
- winding the continuous web upon itself in multiple revolutions about a central core to form a web-wound roll with a winding tension not greater than about 1 N/cm,
- wherein each revolution of the web-wound roll is held substantially separate from the next at the respective web edges by the one or more stripes of coated material which comprises an adhesive blend including an adhesive and microspheres to provide a friction at the respective web edges and prevent a relative axial movement between adjacent revolutions, and the microspheres have an average diameter greater than a coating thickness of the adhesive such that at least some of the microspheres protrude beyond an exposed surface of the adhesive to contact the adjacent revolution.
2 more elements
Dependencies are inferred from the claim text.