Erasable and reusable marking surface
AssigneeKraton Corporation
InventorsKathryn J. Wright, Bharadwaja Peddinti, Felipe Niada
Life of this patent
Estimating the term…
Abstract
An erasable laminate for marking is disclosed. The laminate comprises a substrate with a marking surface, allowing a user to provide markings on the marking surface using the marking material. The marking surface comprises an outer layer containing a sulfonated block copolymer having an ion exchange capacity (IEC) of >0.5 meq/g. At least 50% of the markings can be erased from the marking surface with a wipe moist with a cleaning fluid (e.g., water, isopropyl alcohol, etc.) after wiping for less than 5 min. The laminate with erasable and reusable marking surface can be used for obtaining writing instruments, e.g., notebooks, artist easels, sketches, etc.
Claims20
A laminate for marking comprising:
- a substrate having a marking surface to facilitate markings with a marking material;
- the marking surface comprises an outer layer containing a sulfonated block copolymer, wherein the sulfonated block copolymer has an ion exchange capacity (IEC) of at least 0.5 meq/g;
- the outer layer containing the sulfonated block copolymer has a thickness of at least 1 μm;
- and
- wherein at least 50% of the markings can be erased from the marking surface with a wipe moist with a cleaning fluid after wiping for less than 5 min.
Dependencies are inferred from the claim text.