Patent ID: 11890854
Assignee: MAGNUM MAGNETICS CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B  Y | IPC B

Claim 0:
1. A flexible magnetic sheet comprising:
a magnetizable layer comprising at least one magnetizable component and at least one binder, the magnetizable layer is configured to be magnetizable so as to be useful in magnetically adhering the flexible magnetic sheet to a magnetically receptive surface;
an opaque white or colored writeable outer layer located on one side of the flexible magnetic sheet;
a moisture cured adhesive layer destructively bonding the magnetizable layer and the writeable outer layer together, the moisture cured adhesive layer having a thickness of about 0.6 mil to about 1.5 mil and comprising about 95% to about 99% polyurethane and about 1% to about 3% methylene bisphenyl isocyanate,
wherein the cured adhesive layer is formulated to be resistant to transfer from the flexible magnetic sheet to cutting blades during cutting of the flexible magnetic sheet,
wherein the flexible magnetic sheet is constructed to be resistant to delamination on exposure to direct sunlight, and
wherein cured adhesive of the cured adhesive layer is formulated to not be tacky when exposed to a cutting-machine operational temperature of about 110 degrees Fahrenheit or about 43 degrees Celsius, so as to transfer essentially no residue to the cutting blades.